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Objective This experiment was conducted in order to assess genetic variation, determine of the best genetic structure and association analysis of safflower to identify markers associated with different agronomic traits. Materials and methods In this study, 17 genotypes of safflower were planted as the randomised complete block design at research farm of Shahid Bahonar University of Kerman in 2016. Traits including seed yield, plant height, number of capitulum per plant, number of seed per capitulum, 1000- seed weight, capitulum diameter, day to 50% flowering and day to maturity were measured. The AFLP Technique was performed by the eight EcoR1/Mse1 primer combinations. Results In total, 147 polymorphic bands were generated with average 81.58 polymorphic percentage. Cluster analysis using UPGMA and Jacard as similarity index discriminated safflower genotypes into two groups. Based on GLM and MLM model, 45 and 39 markers had significant association with the studied traits, respectively. M14/E6-10, M14/E11-16, M14/E11-13, M3/E10-14 and M4/E36-12 markers with seed yield, M3/E10-12, M3/E36-29, M59/E36-21 and M14/E11-10 with capitulum number per plant, M4/E36-8, M59/E36-21, M3/E10-9, M14/E11-14 and M14/E11-13 with number of seed per capitulum, M4/E36-19, M4/E36-12, M14/E11-1 and M4/E10-1 with 1000- seed weight, M4/E10-2, M59/E36-21, M3/E36-30, M4/E10-11 and M4/E36-24 with plant height, M3/E36-24, M3/E36-6, M3/E10-20 and M4/E36-18 with capitulum diameter, M14/E11-10, M3/E36-30 and M59/E36-21 with day to 50% flowering, M14/E11-10 and M59/E36-22 markers with day to maturity in both models. Conclusions Detected AFLP markers with strong effects in this study could be desirable candidates for the marker-assisted selection in breeding programs and conversion into other specific markers.

Introduction One of the most important goals of grapes breeding is to obtain seedless grapes with large berries and good taste. In order to achieve table and raisin grape varieties with good quality, desirable taste and larger berries with various colors, it is necessary to estimate the breeding value of the desired traits. In this study, breeding values of fourteen characters in 45 grape cultivars were predicted using the best linear prediction (BLUP) pediction. The purpose of the study was to estimate the breeding value of the grape cultivars and to identify the superior cultivars. The results of this study can be of great help to breeders in selecting cultivars with favorable market traits and cultivars with better yield. Materials and Methods In this study, 45 grape cultivars in the collection of Agricultural and Natural Resources Research Center of West Azerbaijan Province were used. From each of the cultivars in the first year of research, ten 14-year-old plants were selected and TSS, pH, TA, berry weight, flesh weight, single seed weight, seed number, juice volume, pollen germination, cluster length, cluster width, cluster weight, fruit set in open and under controlled pollination were investigated. The characteristics were measured for three consecutive years. Results and Discussion Based on the results, considering the sum of the breeding values of all the studied traits, Agh Shani, Taifl, Qzl Ouzum, Lal Qermez, Tabarze Qermez, Garmian, Rishbaba Qermez and Qara Shani cultivars had the highest rank. Among the studied seedless cultivars, Rejin cultivar had the highest breeding value in terms of single seed weight, and Keshmeshi Sefid cultivar in terms of seed number. Among the seeded cultivars, Shirazi cultivar showed the highest breeding value in terms of single seed weight and Qara Shani cultivar in terms of seed number. Garmian, Rishbaba Qermez, Keshmeshi Qermez, Tabarze Qermez, Agh Shani and shirazi had positive breeding value for pollen germination, fruit set in open pollination and fruit set under controlled pollination. Sarghola, Gazandaii and Qzl Ouzum cultivars had the high and positive breeding value for berry weight and fresh weight. Lal Qermez, Rishbaba Qermez and Tabarze Qermez cultivars had high and positive breeding value for cluster weight, cluster width and cluster weight. Genotypes with the highest breeding value had the highest ability to transfer their traits to offspring. Therefore, they can be used as a desirable parent to modify these traits in crop breeding programs. Conclusion In this study, breeding values of fourteen characters including total soluble solids, titratable acidity, berry weight, flesh weight, single seed weight, seed number, juice volume, fruit set in open pollination, pollen germination, cluster length, cluster width, cluster weight, fruit set under controlled pollination in 45 grape cultivars were predicted using the best linear prediction (BLUP) prediction. Studied cultivars showed different breeding values for the studied traits. Genotypes with the highest breeding value can be used as a desirable parent to modify these traits in grape breeding programs as these genotypes have the highest ability to transfer their traits to offspring. [ABSTRACT FROM AUTHOR]

Objective The aim of this research was to identify marker loci associated with some agronomic traits under drought stress conditions in Common millet. Materials and methods In this study, 30 genotypes of Common millet were planted as augmented design at research farm of Shahid Bahonar University of Kerman in April 2016. In order to induce stress irrigation was stopped at 50% panicling stage. Traits including grain yield, biological yield, 1000- grain weight, number of grain in tiller, number of tiller in plant, panicle length, number of panicle branches, plant height, number of leaf in plant, leaf length, leaf width and harvest index were measured. The AFLP Technique was performed by the six EcoR1/Mse1 primer combinations. Results In total, 246 polymorphic bands were generated and the average percentage polymorphic was 89.13%. Association analysis based on GLM and MLM model indicated that 52 and 64 markers associated to traits under drought stress condition, respectively. Among them, four markers (M4/E10-65, M4/E10-74, M4/E10-67 and M59/E36-105) with grain yield, three markers (M59/E36-84, M10/E1-244 and M10/E1-245) with 1000- grain weight, two markers (M59/E36-106 and M10/E1-224) with number of tiller in plant and five markers (M3/E2-31, M3/E2-35, M3/E2-38, M59/E36-114 and M4/E8-128) with number of grain in tiller showed highly significant and strong relationship under drought stress condition in both models. Conclusions In this study, several common genetic locations for the studied traits were identified. The existence of common markers between different traits may be due to pleiotropic effects or to linked genomic regions affecting several traits.

Since the economic value of a cultivar depends on its different characteristics, thus procedure of selection for several traits to achieve maximum economic value has always been considered by plant breeders. Therefore, accurate knowledge of the behavior and genetic relationship of these traits will help breeders to improve plant genotypes. In this study, 31 retrotransposonbased primers (12 IRAP and 19 REMAP primers) were used to identify molecular markers associated with 21 agronomic, morphological, and physiological traits in 45 different flax (Linum usitatissimum L.) genotypes based on a mixed linear model (MLM). Analysis of population structure by Bayesian method revealed two possible subgroups (K=2) in the population studied. Using MLM, a total of 29 loci associated with the 21 traits studied were identified (P<0.01). The maximum number of associated loci was identified for 100-seed weight and seed yield traits. The existence of common markers among some traits studied, such as the significant relationship between LTR1-UBC808-2 marker with plant height and 100-seed weight, and LTR1-UBC807-4 with main stem weight and the number of capsules per the main stem can be due to pleiotropic effects or linkage between genomic regions involved in these traits. However, findings of the present study can be further strengthened with the inclusion of more markers putatively associated with economically important traits. [ABSTRACT FROM AUTHOR]

Walnut has a high economic value because of the good quality of wood and fruits. So this species has been harvested since many years ago till today and has been introduced as a protected species. The performance of Juglans regia increases in wet years, but reduces in dry years, hence paying attention to physiological and morphological parameters in order to identify the genomic regions related to drought resistant is important for breeding programs in walnut. In this study, genetic diversity by SSR markers has been evaluated. Also, the association of used primers with physiological and morphological traits were analyzed before and after drought stress. 10 SSR primer pairs generated 53 alleles in 62 walnut seedlings. All locies showed significant difference (p≤0.01) from the Hardy-Weinberg. Dendrogram of the Neighbour-Joining method showed that 62 walnut seedlings divided to four main groups. Analyses of population structure by Structure 2.3.1 software identified two sub populations (k=2). Based on association mapping analysis, by using MLM (mixed liner model) method, transpiration, conductance and photosynthesis have been controlled by WGA9 and WGA69 locies in normal condition. In stress condition WGA1 loci showed relationship with CO2 concentration that was covered %75 of variations of this trait. The results of this study can be used in breeding programs of Juglans regia to identify drought resistant varieties.