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AAC Hodge (BW1069) is a hollow-stemmed, awned and high yielding Canada Western Red Spring (CWRS) wheat cultivar suited to the growing conditions in Western Canada. AAC Hodge was 6% higher yielding than AAC Viewfield, the highest yielding check in the Central Bread Wheat Cooperative (CBWC) registration trials (2017–2019). Within the same test, AAC Hodge was 16% higher yielding than Carberry. AAC Hodge matured 1 d earlier than Carberry and 2 d later than Unity; Unity is the earliest maturing check in the eastern prairie growing conditions. AAC Hodge was 7 cm shorter with better lodging resistance than Unity. The lodging score for AAC Hodge was lower than the mean of the checks. The test weight of AAC Hodge was similar to the mean of the checks. Over the 3 yr of testing (2017–2019), the 1000-kernel weight of AAC Hodge was equal to, or higher than all the checks. The grain protein content of AAC Hodge was equal to that of AAC Viewfield. AAC Hodge was rated moderately resistant to Fusarium head blight (FHB; Fusarium graminearum Schwabe) and resistant to leaf rust (Puccinia triticina Erikss.), stripe rust (Puccinia striiformis Westend), stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. & E. Henn), and common bunt [Tilletia caries (DC) Tul. & C. Tul.]. AAC Hodge ranged from resistant to moderately susceptible for its reaction to the Ug99 family of stem rusts. AAC Hodge was resistant to orange wheat blossom midge (OBWM) (Sitodiplosis mosellana Géhin). AAC Hodge was registered under the CWRS class.

This paper examines the learning process by which farmers come to a decision to use newly introduced seeds which were promoted through demonstration plots in midwestern and eastern regions of Uganda. Framed as social and material interactions, we investigated the learning process of the demonstration plots using data from focus group discussions, interviews and a survey amongst 983 individuals. The results reveal several constraints that impede learning, resulting in an overall low awareness and adoption of the introduced seeds. Some of the most prominent constraints resulted from the selection of location and demonstration plot host, the distance of agro-dealers, at district headquarters, limited interactions amongst farmers and irregular involvement of farmers in the demonstrations. Moreover, the prominent role of agro-dealers at field days suggests that informing farmers about where to buy seeds was considered more important than explaining farmers how to grow these seeds profitably. This commercial focus of field days and demonstrations plots had negative consequences for the social learning. This paper contributes to the learning and adoption literature by showing that interactions amongst actors can improve or reduce the balance between didactic, social and environmental learning.

The critical period for weed control (CPWC) adds value to integrated weed management by identifying the period during which weeds need to be controlled to avoid yield losses exceeding a defined threshold. However, the traditional application of the CPWC does not identify the timing of control needed for weeds that emerge late in the critical period. In this study, CPWC models were developed from field data in high-yielding cotton crops during three summer seasons from 2005 to 2008, using the mimic weed, common sunflower, at densities of two to 20 plants per square meter. Common sunflower plants were introduced at up to 450 growing degree days (GDD) after crop planting and removed at successive 200 GDD intervals after introduction. The CPWC models were described using extended Gompertz and logistic functions that included weed density, time of weed introduction, and time of weed removal (logistic function only) in the relationships. The resulting models defined the CPWC for late-emerging weeds, identifying a period after weed emergence before weed control was required to prevent yield loss exceeding the yield-loss threshold. When weeds emerged in sufficient numbers toward the end of the critical period, the model predicted that crop yield loss resulting from competition by these weeds would not exceed the yield-loss threshold until well after the end of the CPWC. These findings support the traditional practice of ensuring weeds are controlled before crop canopy closure, with later weed control inputs used as required.

A high yielding white seeded sesame culture VS 07 023 was developed at Regional Research Station, Vridhachalam and released as VRI 3 during 2017. It is a cross derivative of SVPR 1 and TKG 87. The culture was evaluated for rabi and the summer seasons. The culture VS 07 023 registered overall grain yield of 995 kg/ha which is 22.74 per cent and 17.33 per cent yield increase over the check SVPR 1 (811kg/ha) and TMV (SV) 7 (848 kg/ha), respectively over 95 locations during rabi season. Similarly, the culture VS 07 023 registered remarkably a higher mean seed yield of 1055 kg/ha against the check SVPR 1 (862 kg/ha) and TMV (SV) 7 (928kg/ha). The per cent increase in the mean seed yield over the check was 22.49 (SVPR 1) and 13.77 per cent (TMV (SV) 7). The culture is moderately resistant to Macrophomina root rot disease. The culture VS 07 023 is white seeded containing 50 per cent oil content and exhibited a profuse branching suitable for rabi and the summer irrigated conditions. In view of stable performance of sesame culture VS 07 023, it was released as a new sesame variety VRI 3 during 2017 by Tamil Nadu Agricultural University, Coimbatore for cultivation in major sesame growing districts of Tamil Nadu during rabi and the summer irrigated conditions. Key wordsSesame, white seeded, new variety,VRI 3

Drought tolerance is a highly complex trait and one of the important components of yield stability in wheat. An experiment was therefore conducted to study the drought tolerance status of 14 high-yielding wheat varieties based on morphological characteristics under a randomized complete block design following factorial arrangement with three replications. Variety × Treatment × Year interactions of wheat genotypes were studied for various morphological traits under normal and drought stress conditions for 2 years in plants grown in pots. Significant differences were observed among the 14 varieties of wheat. Sutlej-86 was found to be highly affected by drought, with maximum reductions in plant height, spike length and number of spikelets/spike. The variety with the maximum tolerance to drought was Bahawalpur-97; this variety also had the lowest reductions in the number of fertile tillers/plant, the number of spikelets/spike, spike weight, the number of grains/spike, 1000-grain weight, grain yield/spike, total biomass and stress susceptibility and tolerance indices. Stronger correlations among the studied attributes under drought stress over normal conditions further highlighted drought stress adversities. The studied traits are thus recognized as drought tolerance indicators for varietal selection, and varieties showing less reduction under drought could be used as a standard check in breeding programmes to identify lineages with drought tolerance and could be recommended for drought-stressed areas.

Moringa oleifera Lam. (common name: drum stick, horseradish tree) belongs to the monogeneric family, Moringaceae. Immature pods, fresh leaves and flowers of M. oleifera are used for culinary purposes. The leaves and young pods are a rich source of minerals and vitamins. In the present study, 23 genotypes of drumstick, which were selected based on superiority of yield/tree from 120 genotypes surveyed in South India were subjected to analysis morphology, yield and quality attributes and found they are substantially varying thus necessitate further analysis. Diversity analysis based on the coefficient of variation (CV), genotypic coefficient of variation (GCV), environmental coefficient of variation (ECV), phenotypic coefficient of variation (PCV) and heritability were determined. Quantitative fruit traits such as fruit length (30.56–127.57 cm), fruit weight (72.22–163.27 g), fruit breadth (3–8 cm), number of fruits/tree (NF/T) (320–1000), and number of seeds/fruit (NS/F) (11–29) varied among the genotypes. Correlation studies revealed that the fruit yield had a significant, positive correlation with the number of fruits per tree, length of fruit and single fruit weight. The estimate of PCV was slightly higher than the GCV for all characters studied, indicating that the apparent variation is not only genetic but also influenced by the growing environment in the expression of the traits. Heritability was greater than 90% for all characters studied. The overall analysis outcome of the study emphasizes that selection of high yielding genotypes should give due weightage to the number of fruits per tree and single fruit weight.

AAC Redstar is an early maturing, high-yielding hard red spring wheat (Triticum aestivum L.) cultivar that is well adapted to the northern Canadian Prairies and eligible for grades of Canada Western Red Spring (CWRS) wheat. Over 3 yr (2016–2018) of testing in the Parkland Wheat Cooperative registration trials, AAC Redstar was 11% higher yielding than AC Splendor, 6% higher than Parata, and 4% higher than Glenn and Carberry. AAC Redstar matured 3 d earlier than Glenn, 2 d earlier than Carberry, and had similar maturity to Parata. AAC Redstar was shorter than all checks except Carberry and had better lodging resistance compared with all the check cultivars in the registration trial. The test weight and thousand-kernel weight of AAC Redstar were similar to Carberry. The grain protein concentration of AAC Redstar was 0.2% lower than Carberry. AAC Redstar was rated moderately resistant to Fusarium head blight, leaf rust, stripe rust, and common bunt. AAC Redstar had resistant reactions to loose smut and stem rust. AAC Redstar was registered under the CWRS market class.

High yielding ruminant livestock require high nutritive value in forage for maintenance, growth and production. Climate change has been documented as impacting on the nutritive value of forage plants. Therefore, the aim of this study was to investigate the impact of increased temperature in combination with CO2-enhancement on the nutritive value of orchard grass (cocksfoot; Dactylis glomerata L.), as a C3 model plant, widespread in mountainous permanent grassland plant communities. Functional traits and forage quality of orchard grass were investigated both under ambient (C0T0) and under simulated, future climate conditions (C2T2) with increased temperature (+3°C) and enhanced CO2 concentration (+300 ppm) under field conditions. Plant samples were taken from each of the three growths over a period of three consecutive years and numerous functional properties and forage quality parameters were determined. Special attention was paid to the determination of water-soluble carbohydrates (WSC), crude protein (CP), non-protein N (NPN) and metabolizable energy (ME) as possible indicators for different climatic conditions. It is hypothesized that (i) functional traits and (ii) forage quality of orchard grass are altered by increased temperature and higher CO2 concentration. The results showed a negative impact of C2T2 compared to C0T0 on tiller height (54.4 v. 70.6 cm) and weight (2.42 v. 3.22 g) as average over cuts and years. The NPN content was lower in C2T2 (312 g/kg CP) compared to C0T0 (339 g/kg CP). In contrast, the WSC content was higher in C2T2 (90.3 g/kg DM) compared to C0T0 (82.5 g/kg DM). Both ME content and digestibility were increased in C2T2 (9.18 ME/kg DM and 68.2%) compared to C0T0 (8.86 ME/kg DM and 65.4%). Concluding, under increased temperature and enhanced CO2, both functional traits and certain nutrients and their fractions appear to change in orchard grass.

In chilli, farmer preferences for fruiting habit traits, namely fruit orientation (pendant erect) and fruits node−1(solitary cluster), vary from region to region. For increased acceptability by farmers/consumers, cultivars should be bred with preferred fruiting habit traits in high green fruit yielding background. An investigation was carried out to study the influence of fruiting habit traits on green fruit yield and its component traits during the 2016 and 2017 rainy seasons. The F2, backcross populations and near-isogenic lines (NILs) derived from crosses involving parents differing for single or both the fruiting habit traits were grouped into fruiting habit classes (single and cluster fruiting; and clustered erect, clustered pendant, single erect and single pendant). Significance of differences in fruit yield and its component traits between/among different fruiting habit trait classes were examined using ‘t’/‘F’ tests. The significance of ‘t’/‘F’ tests was regarded as pieces of evidence for considerable effects of fruiting habit traits on fruit yield and its component traits. While results-based on F2and backcross generations indicated a lack of effects, those based on NILs indicated significant effects of fruiting habit traits on fruit yield and its component traits. The plants bearing pendant fruits (irrespective of whether they are clustered or single) produced a large number of heavier and longer fruits than those bearing erect fruits. The results are discussed about the strategies to develop high yielding cultivars with farmer preferred fruiting habit traits.

The sorghum culture TNS 648 (APK 1 x M35-1) recorded an average grain yield of 2445 kg/ha and fodder yield of 6490 kg/ha with an increase of 10.30 per cent and 10 per cent, respectively over CO 30 under rainfed condition. It also excelled K 12 by recording a 9.17 per cent and 13 per cent increase for grain and fodder yield, respectively. In irrigated situation, TNS 648 recorded an average grain yield of 2911 Kg/ha and fodder yield of 11710 kg/ha with a yield increase of 12 per cent and 10, respectively overruling sorghum variety CO 30. TNS 648 also performed better over K12 by recording an 11.32 per cent and 14 per cent increase for grain and fodder yield, respectively. Under AICRP on Sorghum national level testing, TNS 648 recorded a mean yield of 3100 Kg/ha and fodder yield of 11453 Kg/ha and excelled CSV 17 by recording 6.11 and 29.99 per cent increase of grain and fodder yield, respectively. It matures in 105 - 110 days, Grains are highly acceptable, yellowish white in colour, borne on medium semi-compact ear heads. The sorghum culture TNS 648 is moderately resistant to important shoot pests viz., shoot fly and stem borer. It is moderately resistant to downy mildew and grain mold. It has high protein (11.31-14.66 %) and fiber content (5.8 %) along with better cooking quality traits. Hence, the promising culture TNS 648 has been proposed for new release during 2020 and released as sorghum CO 32 for general cultivation in Tamil Nadu for both under rainfed and irrigated condition.

The success of green revolution depends upon the availability of fertilizers, high yielding variety of seeds, improved agronomical practices and timely availability of water. In the present investigation, experimentation was conducted on plant Cajanas cajan of family papilionaceae. An attempt was made through different parameters like height of plants, number of branches per plants, number of pods per plants, dry seed weight per plants. In the experimentation, the effect of biofertilizer individually, in two (twins), and three (thrice) biofertilizers in combinations were observed. The effect of biofertilizer individually, in two, and three biofertilizers in combinations with NPK fertilizers were observed. The effect of biofertilizer individually, in two, and three biofertilizers in combinations with NPK fertilizers and macronutrients were observed. The effect of biofertilizer individually, in two, and three biofertilizers in combinations with NPK fertilizers, macronutrients and micronutrients were observed. Through these observations it had been observed that, in all parameters, biofertilizer individually, in two, and three biofertilizers in combinations with NPK fertilizers, macronutrients and micronutrients were beneficial for plants in achieving the higher production.

Soybean [Glycine max (L.) Merr.], a quantitative short day crop, readily flowers with a little vegetative biomass under short day conditions and poses a challenge for developing high yielding soybean cultivars for tropical and sub-tropical countries. The long juvenility trait helps in gaining biomass under short days by delaying flowering and has helped to establish soybean as a commercially cultivated crop in these countries. A new soybean long juvenile (LJ) germplasm resource AGS 25 was identified by planting germplasm for 2 years under normal (22 June) and shorter (21 July and 21 August) day lengths. Evaluation of AGS 25 along with 252 germplasm accessions in 2 years at eleven locations (19.2610° N to 29.0222° N) could confirm its latitudinal consistency. Inheritance studies conducted under short day winter conditions identified a single recessive allele controlling long juvenility in four F2 populations. The genomic region for this trait was located at chromosome 16 and it explained 30% of the total phenotypic variation. Evaluation of 13 popular varieties and one hundred twenty seven advanced breeding lines (ABLs) (AGS 25 × three conventional juvenile varieties), during short day winter conditions of lower latitudes (19.2644° N), revealed that AGS 25 took maximum days to first flower (R1) (57 days) and attained good plant height (49.6 cm). Evaluation of ABLs identified high yielding segregants with early maturity (up to 90 days). Identified resource opens the possibility for development of early maturing high yielding long juvenile soybean varieties suitable for delayed as well as winter sown conditions.

Breeding for yield and quality requires the assessment of the seed metrics and vigour traits. This study, therefore, assessed the variability and inter-dependence of grain yield (GY), seed morphometric and vigour traits in hybrid maize. Seeds of 75 early maturing hybrid maize varieties were evaluated for morphometric traits and quality in four replicates. A field trial laid out in a randomised complete block design with three replicates was also conducted in Ibadan, Nigeria, to determine the grain yield of the hybrids. Data collected on the GY, seed dimension and quality were subjected to analysis of variance. The least significant difference was used to separate means. Relationships among the GY, seed morphometric and vigour traits were determined using correlation coefficients, while principal component (PC) analysis was performed for variability among the hybrids. Significant differences (P

The rising demand for guava fruit worldwide is due to its richness in vitamin C, high yielding and two bearing seasons. Given the salt stress threat to guavas and the necessity of protective strate...

While Thailand is a major rice exporting country in the world, the yield is low among Asian countries. In order to identify factors determining the changes in rice productivity in the country for the last 45 years (1974���2018), various data on production statistics from the Office of Agricultural Economics were analysed for two key regions of rainfed lowland-based Northeast Thailand and irrigated lowland-based Central Thailand. Rice yield increase in Thailand was slower in the first 16 years to 1989, but more rapid to 2011 followed by a large fluctuation in more recent time, and this pattern reflected in the pattern of rice production in the country. The changes in rice production were partly associated with the changes in irrigation water availability affecting dry season rice area and grain yield, thus increasing total production up to 2011, but thereafter decreasing production. The changes in production were also associated with other factors such as increased fertiliser application rate in early years, proportion of modern high yielding varieties adopted in Central Thailand in early years, and continuous agronomic improvement in Northeast Thailand throughout the whole period. In Northeast Thailand where the largest rice production takes place in the country, the same varieties of high grain quality but rather limited yield potential have dominated since 1974, indicating the importance of grain quality rather than high varietal yield in determining the total rice production in the country. Government policy has appeared to have affected the production, though it is not quantified in the study.

The present study aimed to evaluate the pomological and phenological traits, as well as kernel antioxidant potential of the dominant Greek pistachio cultivars, ‘Aegina’ and ‘Pontikis’ (Pistacia vera L.). Blooming of ‘Aegina’ cultivar occurred from early to mid of April, and nut maturation at middle to late of August. Production started at 6 to 7 years from grafting and full production observed at year 13. Blooming and nut maturation of ‘Pontikis’ occurred about 1 to 2 days later than ‘Aegina’ and production started 6 to 7 years from grafting, with full production observed in the 14th year. Mean tree yields reached 18.0 ± 1.0 kg and 17.4 ± 1.1 kg of dry nuts, in ‘Aegina’ and ‘Pontikis’ cultivar, respectively. ‘Aegina’ cultivar presented intermediate tree vigour and spreading growth habit, whereas ‘Pontikis’ high tree vigour and semi-erect growth habit. ‘Aegina’ nut had a narrowly cordate shape and the percentage of split nut was found at 78.5 ± 6.5. ‘Pontikis’ nut had ovoid shape and the percentage of split nut was 84.1 ± 6.2. In ‘Aegina’ cultivar 100 nuts weighted 101.0 g and in ‘Pontikis’ 114.4 g. Color of kernel was green externally and green to green-white internally, greener in ‘Pontikis’. The antioxidant potential of pistachio kernel measured by FRAP assay, total polyphenolic substances, flavonoids, flavanols and hydroxycinnamic acids content, did not differ (P > 0.05) between cultivars. Evaluation of ‘Aegina’ and ‘Pontikis’ pistachio cultivars revealed that both are high yielding, with large nut sizes of acceptable appearance and high quality.

In Bangladesh, maize stands second place after rice; since it faces diverse natural calamities during its highest growing season (rabi/winter), particularly strong storm during the reproductive stage. Sometimes in some regions, this crop is completely damaged by natural disasters. Considering the burning issue, thirteen hybrids, including 10 previously selected short stature hybrids were evaluated against three local and standard checks: ‘BHM-9’, ‘981’ and ‘Sunshine’ in two consecutive years in seven locations of Bangladesh. Combined analysis over locations and seasons instigated that genotypes ‘Sunshine’, ‘981’ and ‘G10’ were the top-high yielders, while genotypes ‘G1’, ‘G2’, ‘BHM-9’ and ‘Sunshine’ were found the most stable. On the other hand, five genotypes such as ‘G3’, ‘G4’, ‘G6’, ‘G8’ and ‘G9’ had the below-average mean yield and the genotypes ‘G6’ and ‘G9’ were the most unstable. Among the seven environments, Jamalpur, Joydebpur and Dinajpur were most discriminating and Ishwardi was the least discriminating; whereas Joydebpur was more representative and Borishal was the least representative of other test environments. In the case of plant and ear height, most of the genotypes showed a lower value than all the checks, which was desirable. But among the top three high yielders, local cross-genotype, the ‘G10’ had the lowest and more stable value for both plant height and ear height. Therefore, considering the plant and ear height, grain yield, and yield stability, the genotype ‘G10’ has been recommended for release as commercial variety and has been released as new maize variety in Bangladesh with the local name of ‘BARI Hybrid Maize-16’ (BHM-16).

Recent advances in rice breeding in tropical Asia led to the release of high-yielding drought-tolerant cultivars. Together with the use of these cultivars, improved nutrient management under drought should further increase rice productivity in rainfed lowland ecosystems. The objectives of this study were to evaluate cultivar differences in the responses of plant growth and grain yield to fertilizer application regimes. We compared 13 drought-tolerant rice cultivars with two irrigated rice cultivars under three nutrient management conditions in irrigated and rainfed lowlands in the Philippines during the wet seasons of 2014 and 2015. Drought stress was mild in both years, with a yield reduction of 11 to 12%, and there was no significant cultivar × nutrient management interaction in yield. The drought-tolerant cultivar NSIC Rc282 proved fertilizer-responsive, and had similar yield to those of the popular high-yielding cultivar NSIC Rc222 under all conditions. An ancillary experiment in 2016 confirmed that NSIC Rc282 was more drought-adapted than NSIC Rc222, with 11% to 37% higher yield under stress. In order to maximize the yield, NSIC Rc282 required N application only when the drought ended, whereas NSIC Rc222 required additional N during the drought. This shows that the details of drought-adaptive nutrient management differ between irrigated and drought-tolerant rice cultivars. We suggest that the introduction of high-yielding drought-tolerant rice cultivars will both improve productivity and increase the nutrient-use efficiency in rainfed environments.

Salinity is one of the major abiotic stress that affects the rice production. A research study was conducted to screen the Saltol introgressed backcross inbred lines viz., BIL33, BIL 44 and BIL 752 of ADT 37 × FL 478 and BIL 1094, BIL 1095 and BIL 1102 of CR 1009 Sub 1 × FL 478 possessing the Saltol QTL for seedling stage salinity tolerance. The confirmation for the presence of Saltol QTL in the lines was analyzed using the foreground SSR marker RM 3412, a linked marker for Saltol QTL. The lines along with the recurrent parents ADT 37 and CR 1009 Sub 1 and donor parent FL 478 were subjected to salt stress under hydroponic condition under two different concentrations of EC viz., 6 dS/m (lower concentration) and 12 dS/m (higher concentration). The salt stress injury scoring, root and shoot length reduction percentage and Na+/K+ ratio were analyzed and measured. Among the lines, BIL 752, BIL 1094 and BIL 1102 showed tolerance to salt stress injury, minimum reduction in root (18.1%) and shoot length (27.4%) percentage and the minimum Na+/K+ ratio in both shoots and roots even under higher concentration while BIL 33, BIL 44 and BIL 1095 showed moderate tolerance to salt stress. The selected saline tolerant lines will be further evaluated in saline areas to observe yield potentiality for developing high yielding saline tolerant varieties and as donor parents in future breeding programs.

Garden pea is an important off-season vegetable in the hills of North Western Himalayas that provides high remuneration to growers. Lack of high yielding wider adaptive varieties restricts its productivity. To identify high yielding stable genotypes across environments, 48 lines were evaluated in Alpha Lattice design over seven diverse environments spreading in five locations from sub-tropical to dry temperate conditions of Himachal Pradesh during winter 2016–2017 (5 environments) and one location each during summer 2017 and winter 2017–2018. The highest mean pod yield over environments was produced by SP-3 (83.35 g) which was 20% higher over check Pb-89 while SP-6 (79.45 g) and SP-22 (76.90 g) got second and third rank with significant increase of 15 and 11% for pod yield over the check, respectively. The joint regression analysis depicted significant G × E (linear) interaction for pods/plant and pod yield/plant. Of the seven genotypes depicting stability for pod yield, SP-6 showed stability (bi = 1 and S2di = 0) for all the traits whereas SP-22 showed the same for seeds/pod and shelling percentage. G + GE biplot described Dhaulakuan as the most representative and discriminating environment for pod yield. In the mean vs. stability GGE biplot, SP-6, SP-22 and SP-17 were highly stable while SP-3 possessed medium stability. ‘Which won where’ polygon view represented SP-3, SP-6 and SP-22 as most stable for yield and pod attributes across environments, constellated into majority of the environments and can be released for commercial cultivation.

Striga hermonthica (Del.) Benth parasitism, low soil N, and nutritional deficiencies of normal‐endosperm maize (Zea mays L.) threaten maize yield and exacerbate nutritional problems in sub‐Sahara Africa (SSA). This study was conducted (a) to evaluate genetic variation among extra‐early maturing maize hybrids with provitamin A and quality protein characteristics, (b) to investigate gene action governing the inheritance of Striga resistance, grain yield, low N tolerance, and other measured traits under low‐N, high‐N, and Striga‐infested environments, and (c) to identify hybrids with high yield and stability across environments. One hundred and fifty hybrids developed using North Carolina Design II were evaluated with six checks under low‐N, high‐N, and Striga‐infested environments in Nigeria. Mean squares for hybrids were highly significant (P

Developing high yielding maize (Zea mays L.) varieties that have relatively high grain protein content under low nitrogen stress is critical to ensure food and nutrition security in sub-Saharan Africa. This study evaluated the efficiency for fertilizer N recovery, grain yield and grain protein content of 10 maize hybrids selected for their contrasting yield performance under low-N stress conditions in the field. The hybrids were grown under 6 N rates (0-10-20-40-80 and 160 kg Ammonium Nitrate ha−1) at 2 sites that differ for residual soil nitrogen (N-NO3). Fertilizer N recovery, estimated using the difference method, decreased with increasing N rates or residual soil N and was significantly higher for the low-N tolerant (LNT) hybrids than low-N sensitive (LNS) hybrids, especially at low N rates. Although there was yield increase with increased N rate, the yield of tolerant hybrids responded more strongly than that of sensitive ones. Under low residual soil N, higher grain yield was associated with lower grain protein content in both low-N tolerant and susceptible hybrids but tolerant ones exhibited a significantly lower decrease in grain protein content compared to susceptible hybrids. In addition, LNT hybrids were able to maintain relatively higher grain protein content at high yield level under depleted soil N conditions as well as under high N level. We concluded that LNT hybrids could contribute to optimizing the use of small N fertilizer rates by resource-poor smallholder farmers to increase the nutritional value and profitability of producing maize.

CS58 is a newly developed, salt-tolerant, high-yielding Indian mustard variety from ICAR- CSSRI, Karnal, India, to harness the yield potential of salt-affected soils of India. It produced 24-25% higher seed yield than the national check varieties CS54 and Kranti and was well received and adopted by farmers in salt-affected areas of the country during on-farm demonstrations.

BackgroundEstimation of genetic trends using historical data is an important parameter to check the success of the breeding programs. The estimated genetic trends can act as a guideline to target the appropriate breeding strategies and optimize the breeding program for improved genetic gains. In this study, 17 years of historical data from IRRI’s rice drought breeding program was used to estimate the genetic trends and assess the success of the breeding program. We also identified top-performing lines based on grain yield breeding values as an elite panel for implementing future population improvement-based breeding schemes.ResultsA two-stage approach of pedigree-based mixed model analysis was used to analyze the data and extract the breeding values and estimate the genetic trends for grain yield under non-stress, drought, and in combined data of non-stress and drought. Lower grain yield values were observed in all the drought trials. Heritability for grain yield estimates ranged between 0.20-0.94 under the drought trials, and 0.43-0.83 under non-stress trials. Under non-stress conditions the genetic gain of 0.44% (21.20 kg/ha/year) for genotypes and 0.17 % (7.90 kg/ha/year) for checks was observed. The genetic trend under the drought conditions exhibited a positive trend with the genetic gain of 0.11% (1.98kg/ha/year) for genotypes and 0.55% (9.52kg/ha/year) for checks. For combined analysis showed a genetic gain of 0.39% (12.13 kg/ha/year) for genotypes and 0.60% (13.69 kg/ha/year) for checks was observed. For elite panel selection, 200 promising lines were selected based on higher breeding values for grain yield and prediction accuracy of >0.40. The breeding values of the 200 genotypes formulating the core panel ranged between 2366.17 and 4622.59 (kg/ha).ConclusionsA positive genetic rate was observed under all the three conditions; however, the rate of increase was lower than the required rate of 1.5% genetic gain. We propose a recurrent selection breeding strategy within the elite population with the integration of modern tools and technologies to boost the genetic gains in IRRI’s drought breeding program. The elite breeding panel identified in this study forms an easily available and highly enriched genetic resource for future recurrent selection programs to boost the genetic gains.

Background: Drought is the most familiar abiotic stress limiting chickpea production. Genotypes may vary in their capacity to tolerate drought stress. Therefore, the study was undertaken to find out suitable genotypes in the drought prone ecosystems. Methods: The experiments were carried out at the Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during 2017 and 2018 with thirty chickpea genotypes and four moisture stresses. Through cluster analysis, genotypes were distinguished in five clusters based on similarity in characters. Result: Among the thirty chickpea genotypes BD-6048 and BD-6045 were found the most droughts tolerant based on field performance. Dendrogram was prepared based on similarity by Euclidean distance among genotypes. Dendrogram showed that members falling in clusters III and IV were more diverse. Data certified that significant genetic variation exists in chickpea genotypes in performance of various attributes in this study and these genotypes can potentially be used for chickpea breeding program.

High-yielding short-duration cultivars are required due to the development of mechanized large-scale double-season rice (i.e. early- and late-season rice) production in China. The objective of this study was to identify whether existing early-season rice cultivars can be used as resources to select high-yielding, short-duration (less than 115 days) cultivars of machine-transplanted late-season rice. Field experiments were conducted in Yongan, Hunan Province, China in the early and late rice-growing seasons in 2015 and 2016. Eight early-season rice cultivars (Liangyou 6, Lingliangyou 211, Lingliangyou 268, Xiangzaoxian 32, Xiangzaoxian 42, Zhongjiazao 17, Zhongzao 39, and Zhuliangyou 819) with growth durations of less than 115 days were used in 2015, and four cultivars (Lingliangyou 268, Zhongjiazao 17, Zhongzao 39, and Zhuliangyou 819) with good yield performance in the late season in 2015 were grown in 2016. All cultivars had a growth duration of less than 110 days when grown in the late season in both years. Zhongjiazao 17 produced the maximum grain yield of 9.61 Mg ha−1 with a daily grain yield of 108 kg ha−1 d−1 in the late season in 2015. Averaged across both years, Lingliangyou 268 had the highest grain yield of 8.57 Mg ha−1 with a daily grain yield of 95 kg ha−1 d−1 in the late season. The good yield performance of the early-season rice cultivars grown in the late season was mainly attributable to higher apparent radiation use efficiency. Growth duration and grain yield of early-season rice cultivars grown in the late season were not significantly related to those grown in the early season. Our study suggests that it is feasible to select high-yielding short-duration cultivars from existing early-season rice cultivars for machine-transplanted late-season rice production. Special tests by growing alternative early-season rice cultivars in the late season should be done to determine their growth duration and grain yield for such selection.

Potato is one the of world’s most important crops. It is grown primarily for human consumption but is also used to feed cattle and to produce alcohol and starch. In modern industry, potatoes are a major source of starch. Unpredictable growing conditions strongly influence the cultivation of starch potatoes. One of the best methods for dealing with unpredictable stresses, including those caused by climate change, is cultivation of stable and high yielding cultivars. In the present work, tuber yield and starch yield from a Polish post-registration series of field trials conducted in the years 2013–2016 were analyzed using three different linear mixed models, which can be associated with three different stability measures. It is shown that cultivar Pokusa was the highest yielding and the most stable cultivar in terms of tuber yield, while cultivar Kuras was the most stable and the highest starch yielding cultivar. Moreover, using mixed model factorial regression, it is shown that temperatures in June and August and total precipitation in August had significant influence on tuber yield in the analyzed series of field trials.

The nature and magnitude of genetic diversity was assessed among 120 genotypes of pigeonpea along with three checks in augmented design during Kharif, 2011-12. The Non-hierarchical Euclidean cluster analysis grouped all the genotypes into twelve distinct non-overlapping clusters indicated existence of high degree of genetic diversity in the materials. The crossings between the members of diverse clusters separated by high inter-cluster distances are likely to throw desirable segregants. In this context, very high inter cluster distances were recorded between cluster VI and XII, cluster V and XII, cluster II and IX, cluster VI and XI, cluster II and VI and cluster V and IX. Considering the mean performance for different characters of genotypes belonging to diverse clusters, the promising genotypes for exploitation as parents in breeding programme were NDAGC 2011-4, NDAGC 2011-42 and NDAGC 2011-2 of cluster II; NDAGC 2011-18, NDAGC 2011-58, NDAGC 2011-34 and NDAGC 2011-27 of cluster V; NDAGC 2011-16, NDAGC 2011-41, NDAGC 2011-88, NDAGC 2011-104 and NDAGC 2011-103 of cluster VI; IC 525504 and Pusa 33 of cluster IX and IC 525456, IC 525408 and IC 525463 of cluster XII. It may be concluded that crosses between diverse genotypes belonging to clusters separated by high inter-cluster distances with desired means are likely to produce transgressive segregants may be advocated for developing high yielding pigeonpea varieties.

The objective of this research was to determine the difference on growth between a rice cultivar with Clearfield® technology (Only Rice 228) and a hybrid (Benja 1); to characterize nutrient uptake,...

Cotton ramulosis caused by Colletotrichum gossypii var. cephalosporioides is the main disease in the cotton growing areas of South America. Commercially available cultivars do not exhibit ramulosis resistance and thus it is necessary to identify sources of resistance. This study evaluated the Colombian LCER collection of advanced breeding lines (ABLs) of Upland cotton for ramulosis resistance. LCER is composed of F6 lines derived from crosses between lines with African and Colombian ancestry (LC collection) and high yielding cultivars from USA, Brazil and Africa adapted to the monsoon and savanna climate of the Colombian Caribbean. Disease development was measured thirteen weeks after planting using a qualitative scale designed for high levels of ramulosis intensity (absence of healthy plants and high proportions of dwarf plants for susceptible cultivars). A ramulosis resistant scale (RSC) was developed from these disease assessments to evaluate the ABLs across environments. Thirteen ABLs exhibited ramulosis resistance. Fourteen ABLs were classed as susceptible cultivars, while the remaining 30 exhibited intermediate levels of resistance. Half of the individuals in susceptible ABLs exhibited dwarfism symptoms while the plant population in resistant cultivars showed lower percentage of dwarfism (

Genetic variation and heritability estimates in early generations are important in identifying superior families that can be targeted for genetic advancement. Early generation selection has been a successful tool to enhance selection efficiency in plant breeding programs. The aim of this study was to select and advance F3 families of wheat relative to their parents for drought tolerance using agronomic traits. Twelve parental lines and 66 newly-developed F3 families were evaluated using a 6 ×x 13 alpha-lattice design under drought-stressed and non-stressed conditions. Considerable genetic and phenotypic variation was observed for days to heading, plant height, spike length, kernels per spike, fresh biomass, and grain yield. Expected genetic gains were high for fresh biomass and grain yield. The families LM02 × LM05, LM02 × LM23, LM09 × LM45, and LM13 × LM45 were high yielding with high biomass values and are recommended for genetic advancement using single seed descent.

Potassium (K) plays an important role in maize yield, but K accumulation characteristics in high yielding maize is still not well documented. A two-year field experiment was conducted to investigat...

The Philippines has recently been aiming to achieve self-sufficiency in rice. Recent programs and policies have been anchored on the development and adoption of high-yielding rice varieties in order to achieve this goal. Thus, this paper aims to identify the factors that significantly affect the farmers’ adoption of high-yielding varieties such as hybrid and certified inbred rice. Using a multinomial logistic model, these factors were estimated. Results show that the age, input assistance, and collective marketing significantly affect the adoption of certified inbred rice over farmers’ recycled seeds. On the other hand, irrigation, farm size, and trainings significantly affect the adoption of hybrid over farmer’s recycled seeds. In general, there was a low adoption rate of hybrid rice. Key informant interviews revealed that several issues arise in the process of seed growing, production, and marketing. Therefore, to increase the farmers’ incentive to adopt hybrid rice, a hybrid variety that produces superior grain quality and resistance to stresses must be developed and distributed at a reasonable price.

The base - population of the controlled cross breeding is one of the important factors to develop a new improved cultivar. Since the incompatible nature of sweet potato remains a barrier for genetic improvement, therefore it requires a lot of crossed pairs. This study aimed to determine the level of incompatibility among crossing line between high yielding and micronutrient content cultivars. The field experiment conducted at Brawijaya University Research Station, Jatikerto-Malang, during February to August 2015. The North Carolina Design II was applied to sixty pairs controlled cross breeding and their sixty reciprocal pairs of six cultivars for micronutrient content enrichment with ten high yielding cultivars. The observations were made to the cross flowers number, capsules, fruit sets, and seeds number. The level of incompatibility between crossed pairs was determined by the level of fruit set. The result showed that most pairs were compatible (fruit set > 20%) and only few were incompatible (fruit set < 10%). Among six parents with micronutrient content enrichment, two of them, have a high compatibility as as female parents, to all the high yielding cultivars, i.e. BIS OP-61 and Cangkuang. Positioning as a female parent can improve the effectiveness of its selection scheme.

Breeding for organic systems may be done as pure line or population breeding. Early vigour, critical to organic systems, was compared for different winter wheat breeding origins in a hydroponic system, as well as in the field. Entries were: the F15 of composite cross populations (CCPs), based on high yielding (Y), high quality (Q) or Y*Q varietal intercrosses after 11 generations evolving under organic management; four organically bred; four conventionally bred baking quality varieties; a hybrid bread wheat and a high yielding variety. Hydroponic traits corresponded well with ground cover and plant height measured in the field. The organically evolved Q and YQ CCPs, organic varieties ‘Poesie’, ‘Butaro’ and ‘Tobias’ and the conventional ‘Capo’ were best suited for organic conditions. Compared to most modern varieties, CCPs had fewer seminal roots, their roots tended to be thicker and their root systems heavier, suggesting specific adaptation to penetration into deeper soil zones. Conventionally bred ‘Capo’ exhibits a diverse combination of root traits adaptive to a variable range of soil and environmental conditions, which may contribute to higher nutrient-use efficiency. Average root diameter of conventional E-varieties (0.28 mm) was significantly lower compared to organic varieties or the Q/YQ CCPs (both 0.30 mm). Specific root length of conventional E-varieties (17.5 cm mg−1) was significantly higher than for organic varieties (15.9 cm mg−1) and both differed from the Q and YQ CCPs (14.3 cm mg−1). Seminal root length and shoot length were identified as reasonable non-destructive predictors for direct selection within segregating materials and populations.

Pigeonpea breeding activities started about a century ago and for decades only late maturing cultivars dominated the global cultivation. Historically, no early maturing cultivar was available for a very long time and breeding of such varieties started in the third quarter of 20th century but at a low key. From these efforts, some pigeonpea varieties maturing in 90–150 days were bred. Information gathered from various sources revealed that the first few early maturing genotypes originated through spontaneous mutations in the late maturing field‐grown landraces. In other cases, transgressive segregation and induced mutations also produced early maturing varieties. At present, the high yielding early maturing cultivars are contributing significantly towards widening the adaption barriers and in the diversification of some age‐old cropping systems. In this paper, the authors, besides discussing the importance of early maturing cultivars in present agricultural systems, also summarize information related to the origin of primary sources of earliness.

The objectives of this study were (a) to compare the effectiveness of the two methods of pedigree selection in barley: the ear-to-row classical pedigree method and the honeycomb method and (b) the evaluation of the selection criteria of the honeycomb methodology. Five F12 lines developed by classical pedigree method were used as checks in order to compare seven lines developed by honeycomb methodology. Five honeycomb pedigree lines were selected by PYI basic selection criterion of honeycomb methodology and two more (rejected by PYI) were selected by YC, a new criterion proposed for improving selection of high yielding plants in honeycomb design. Also, the original local population from which all these lines were derived and two commercial barley cultivars were used as the basic checks. All genotypes selected by classical and honeycomb pedigree method out yielded the original local population. Many of them reached or out yielded the commercial cultivars used as checks and thus both classical and honeycomb pedigree methods were able to promote some homozygous genotypes in order to be used as new cultivars. Yield performance of progeny lines selected by classical pedigree method was better than honeycomb’s. Only when YC was used as selection criterion honeycomb pedigree lines showed high yielding performance. Comparing PYI and YC selection criteria, it seems that the second is better for promoting high yielding and stable lines for next generations to be used as future new cultivars. Grain yield and bulk density are safer traits than 1000-kernel weight, for efficient selection that ensures high and stable yields.

Groundnut TMV 14 is high yielding Spanish bunch genotype. It is the cross derivative of VRI 6 x R 2001-(2) through pedigree method of breeding Groundnut TMV 14 (2124 kg/ha) has given higher pod yield over the check varieties; 11.5 % increase over VRI (Gn) 6 (1904kg/ha); 15.2 % over check variety TMV Gn 13 (1844 kg/ha) during Kharif season. Groundnut TMV 14 (2286 kg/ha) has given higher pod yield over the check varieties; 29.7 % increase over VRI(Gn)6 (1762kg/ha); 32.3 % over check variety TMV Gn 13 (1727kg/ha) during rabi season under irrigated condition.For oil yield during Kharif season (720 kg/ha), variety TMV 14 gave 14.6%(720kg/ha)increase over VRI(Gn)6 (628kg/ha); 10.7 % over TMV Gn 13 (650 kg/ha) during Kharif season. Similarly for oil yield during rabi season under irrigated condition(775 kg/ha), variety TMV 14 gave 33.3% increase over VRI(Gn)6 (581 kg/ha); 27.2 % over TMV Gn 13 (609 kg/ha).For dry haulm yield (3640 kg/ha), variety TMV 14 gave 12.3% increase over VRI(Gn)6 (3240kg/ha); 22.6 % over TMV Gn 13 (2970 kg/ha) during Kharif season. For dry haulm yield (3758 kg/ha) the variety TMV 14 gave 13.02% increase over VRI(Gn)6 (3326kg/ha); 4.03 % over TMV Gn 13 (3604 kg/ha) during rabi under irrigated condition. Shelling turnover of TMV 14 (70.6%) comparable with VRI(Gn)6 (68%). Sound Mature Kernels are more in TMV 14 (93.9%) compared to VRI(Gn)6 (92%). 100 kernel weight are more in TMV 14 (38g) compared to VRI(Gn)6 (35.0) and TMV Gn 13( 34.6).The variety TMV 14 matures early in 95-100days.For Late leaf spot and rust diseases, variety TMV 14 has shown moderated resistance incidence compared to check varieties.TMV 14 has shown tolerance against Spodoptera litura, thrips and Heliathis armigera and leaf miner.

The present investigation was undertaken with a view of expedition of putative restorers for the development of high yielding rabi sorghum hybrids. Three CMS line were tested with ten restorers in line × tester mating design to evaluate seed set per cent and fertility restoration behavior. Restorers AKRB-335-3, Rb-413-1, AKRB-428, AKRB-429, AKRB-430 and AKRB-431 exhibited high fertility restoration ability in the CMS lines and therefore, hybrids viz. AKMS 30A×AKRB-335-3, AKMS 30A×AKRB-428, AKMS 30A×Rb-413-1, AKMS 30A×AKRB-429, AKMS 30A×AKRB-430, AKMS 30A×AKRB-431, AKRMS 45A×AKRB-335-3, AKRMS 45A×AKRB-428 and AKRMS 45A×Rb-413-1 showed high seed set percentage with anther fertility rating (9.0). The inheritance of fertility restoration revealed that observed frequency fits well into Mendelian ration of 3:1 for seed setting indicates that fertility restoration is governed by single dominant gene. Cluster analysis differentiate thirty hybrids in three classes, fully fertile revealed that their corresponding restorers considered to be putative restorers having high potential of fertility restoration, partial fertile hybrids stated that some modifier genes has a vital role in restoration of fertility, whereas, sterile hybrids indicate that their restorers act as maintainer as it maintain the sterility of all three CMS line.

Lack of suitable malt barley varieties that exhibit high yielding, stable performance, and good malting quality is the major factor among several production constraints contributing to low productivity of malt barley in the North Gondar Zone. The present study was done to evaluate and recommend the best performing varieties in the major potential areas of North Gondar. The experiment was conducted at three locations for two consecutive years (2015 and 2016) during the main cropping season using twelve improved varieties. The design was randomized complete block design with three replications. Analysis of variance and GGE [genotype main effect (G) and genotype-by-environment interaction (GE)] biplot analysis were conducted following their respective procedures. Combined analysis of variance revealed a highly significant difference (P < 0.01) among genotypes, environments, and genotype-by-environment interaction for grain yield, most agronomic and malt quality traits. All the varieties had acceptable malt quality traits. The variety IBON-174/03 was found to be the highest yielding and the most stable variety across environments. According to the polygon view of biplot analysis, the varieties were spread across four sections and the test environments spread across two sections. Among the six test environments, D and C were more discriminating and F and B were less discriminating. Test environments F, E, and A were found to be more representative of the mega-environment than D. Considering early maturity, malt quality, grain yield, and stability performance; it is recommended to use the variety IBON-174/03 for production in the study areas and in similar areas.

Tan spot, caused by Pyrenophora tritici-repentis, is a major foliar disease of wheat in Kazakhstan. This study evaluated 103 winter wheat genotypes for tan spot resistance and high-productivity traits in the field in two years. Entries were also characterized using the molecular marker Xfcp623, indicative of Tsn1 gene conferring sensitivity to Ptr ToxA. The proportion of entries insensitive to Ptr ToxA was relatively high (71%). Forty-eight entries with the lowest tan spot severity in the field were confirmed to be insensitivity to Ptr ToxA in the molecular screening. Entries which were resistant under field conditions had similar level of seedling resistance. Principal component analysis biplots showed, that all spike productivity traits were highly correlated. Days to heading (DH) and tan spot severity, as well as the normalized difference vegetation index and DH were strongly correlated. Thousand kernels weight (TKW) and plant height were highly correlated and both were negatively correlated with DH and tan spot severity, indicating that taller cultivars tended to be more resistant. The Xfcp623 negative entries had lower disease severity (by about 40%), flowered up to 2 days later than entries with Tsn1 and had significantly more spikelets per spike, number of grains per spike, TKW and grain weight/spike. The results of the study will be important for increasing the efficiency of breeding based on the elimination of the genotypes with dominant allele Tsn1. Of the 103 entries evaluated, 28 can be directly used in breeding programs to improve tan spot resistance and productivity of winter wheat.

Lodging (stem bending) is a serious problem causing severe yield reduction, poor grain filling, lower harvest index and deterioration in grain quality of chickpea in environments characterized by favorable temperatures and soil moisture conditions. Breeding for lodging resistance is also required to improving adaptation to better agronomy for achieving a breakthrough in its productivity and stability of production. However, no information is available on genetics of lodging resistance in chickpea. The objectives were to (i) characterize the newly identified lodging resistant germplasm FLIP07-183C for important plant characteristics and (ii) study the inheritance of lodging resistance in an inter-varietal cross between lodging susceptible high yielding desi cultivar Pusa 362 and the newly identified lodging resistant kabuli germplasm FLIP07-183C. FLIP07-183C was a tall, erect, late flowering genotype with semi-determinate stem growth habit and large seeds. It contained higher lignin content than the lodging susceptible cultivar, Pusa 362. Lodging resistance was found to be dominant over susceptibility. The segregation patterns in F2 and F3 of the cross Pusa 362 × FLIP07-183C showed that two dominant non-allelic genes with duplicate gene action controlled lodging resistance in FLIP07-183C. The two non-allelic duplicate dominant genes for lodging resistance in FLIP07-183C are designated as Sb1/sb1 and Sb2/sb2. The homozygous recessive for both alleles (sb1sb1sb2sb2) produced a lodging susceptible phenotype. The utilization of genes identified for lodging resistance has the major impact on chickpea breeding for better adaptation to cool climate, high fertility and irrigated environments.

Background: The narrow genetic base and environmental stresses are behind the low rate of faba bean yield in the past two decades. Drought stress is one of the most destructive abiotic stresses. Using induced mutagenesis on locally adapted landrace cultivar is proposed to cope with this problem. Methods: This study was conducted on faba bean landrace cultivar of Saudi Arabia, namely Hassawi 2, treated by 25 and 50 Gray gamma radiation. The genetic diversity assessment of M2 mutant populations was based on seven quantitative traits and nine Amplified Fragment Length Polymorphism (AFLP) primer combinations. Result: A total of 3419 M2 seeds were planted, of which 2782 (81.4%) seeds germinated and 2658 plants survived. A 5 to a 10-fold range of quantitative traits studied among mutant plants compared to control plants showed high variability. The number of pods per plant and seeds per plant was a valid selection criterion for a high-yielding faba bean breeding program. Nine AFLP primer combinations generated 1079 polymorphic alleles from 88 samples that comprised mutant and control plants. Shannon index (I) and expected heterozygosity (He) were 0.337 and 0.206, respectively. The AFLP results validated high variability in M2 populations. These findings will assist faba bean breeders in developing high-yielding cultivars with drought stress tolerance.

Background: The production of pulses recorded a negative growth rate due to stagnation in expansion of pulse growing area and very slow progress in the improvement of productivity of important pulses. Therefore, there is urgent need to increase the area under pulse crops by promoting them into new areas and seasons. Blackgram [Vigna mungo (L.) Hepper] is third most important pulse crop both in acreage and production in India and hence, identification of high yielding dual season (kharif and summer) stable blackgram genotypes is very crucial for horizontal expansion of crop, which in turn leading to increased production. The present study was thus envisaged to identify stable, high yielding dual season (kharif and summer) genotypes. Methods: Twenty-five blackgram genotypes were evaluated at three different locations during kharif and summer seasons to identify high yielding, stable and suitable for dual season. The data obtained from six environments was subjected to stability analysis as per Eberhart and Russell (1966).Result: Analysis of variance for stability revealed that variance due to genotypes, environment and environment + (genotype × environment) were highly significant for all the characters. The genotypes viz., TRCRU-136, BDU-20, BDU-18, AKU-15 and TRCRU-22 were found early maturing with wider adaptability to unfavourable environments. While, BDU-18 and LBG-465 were found stable in expression with high mean performance across the six environments for 100-seed weight. From the present study, six promising stable genotypes viz., BDU-17, TRCRU-22, BDU-18, TRCRU-339, TRCRU-18 and IC 436778 were identified for cultivation during kharif as well as summer seasons.