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Powdery mildew (PM) caused by Erysiphe polygoni is an important foliar disease in mungbean (Vigna radiata). A previous study showed that QTL qPMRUM5-2 is a major locus for PM resistance in mungbean accession RUM5 (highly resistant). Bioinformatics analysis revealed that flanking markers of the qPMRUM5-2 covered a region of 1.93 Mb. In this study, we conducted fine mapping for the qPMRUM5-2 using the F2 population of 1156 plants of the cross between Chai Nat 60 (CN60; highly susceptible) and RUM5. PM resistance evaluation was performed under field conditions using F2:3 lines grown in three different environments. QTL analyses consistently located the qPMRUM5-2 to a 0.09 cm interval on linkage group 6 between InDel markers VrLG6-InDel05 and VrLG6-InDel10, which corresponded to a 135.0 kb region on chromosome 8 containing nine predicted genes of which five were NBS-LRR-type genes Recognition of Peronospora parasitica 13-like protein (RPP13L). Whole-genome re-sequencing of RUM5 and CN60 showed polymorphisms in four RPP13L genes predictively cause substantial amino acid changes, rendering them important candidate genes for PM resistance. The InDel markers VrLG6-InDel05 and VrLG6-InDel10 flanking to the qPMRUM5-2 would be useful for marker-assisted breeding of PM resistance in the mungbean. [ABSTRACT FROM AUTHOR]

Jatropha curcas (known as jatropha and physic nut) can be used as an alternative source for biodiesel and biomass production. However, conventional breeding of J. curcas needs time, labor and land for characterization and evaluation of the progenies owing to its perennial growth habit. Quantitative trait loci (QTL) mapping can help identifying marker-trait association and accelerate breeding process of perennial crops through marker-assisted selection. However, the genetic basis for woody biomass improvement in jatropha has not yet been studied. In this manuscript, we report the construction of a SNP-based linkage map and detection of QTLs for woody-biomass-related traits using an F2 population of the interspecific cross between J. curcas and Jatrophaintegerrima. A high-density genetic linkage map containing 2,179 SNPs was constructed. As high as 89.26% of the SNP markers developed from these interspecific progenies expressed significant segregation distortion. Most of the distorted markers showed neither gametophytic nor zygotic selection, except those on linkage groups 3, 5 and 6 which showed gametophytic and zygotic selection. The F2 population showed high variation and transgressive segregation for plant height, canopy width and wood density. QTL analyses detected 5, 8, and 7 loci for plant height, canopy width, and wood density, respectively. The SNPs linked to these QTLs could be incorporated into marker-assisted breeding to maximize the selection gain in jatropha biomass breeding. [ABSTRACT FROM AUTHOR]

Introduction: Lablab (Lablab purpureus (L.) Sweet), an underutilized tropical legume crop, plays a crucial role in global food and nutritional security. To enhance our understanding of its genetic makeup towards developing elite cultivars, we sequenced and assembled a draft genome of L. purpureus accession PK2022T020 using a single tube long fragment read (stLFR) technique. Results and Discussion: The preliminary assembly encompassed 367 Mb with a scaffold N50 of 4.3 Mb. To improve the contiguity of our draft genome, we employed a chromatin contact mapping (Hi-C) approach to obtain a pseudochromosome-level assembly containing 366 Mb with an N50 length of 31.1 Mb. A total of 327.4 Mb had successfully been anchored into 11 pseudomolecules, corresponding to the haploid chromosome number in lablab. Our gene prediction recovered 98.4% of the highly conserved orthologs based on the Benchmarking Universal Single-Copy Orthologs (BUSCO) analysis. Comparative analyses utilizing sequence information from single-copy orthologous genes demonstrated that L. purpureus diverged from the last common ancestor of the Phaseolus/Vigna species approximately 27.7 million years ago. A gene family expansion analysis revealed a significant expansion of genes involved in responses to biotic and abiotic stresses. Our high-quality chromosome-scale reference assembly provides an invaluable genomic resource for lablab genetic improvement and future comparative genomics studies among legume species. [ABSTRACT FROM AUTHOR]

Black gram [Vigna mungo (L.) Hepper] is a highly nutritious grain legume crop, mainly grown in South and Southeast Asia, with the largest area in India, where the crop is challenged by several biotic and abiotic stresses leading to significant yield losses. Improving genetic gains to increase on-farm yields is the primary goal of black gram breeding programs. This could be achieved by developing varieties resistant to major diseases like mungbean yellow mosaic disease, urdbean leaf crinkle virus, Cercospora leaf spot, anthracnose, powdery mildew, and insect pests such as whitefly, cowpea aphids, thrips, stem flies, and bruchids. Along with increasing on-farm yields, incorporating market-preferred traits ensures the adoption of improved varieties. Black gram breeding programs rely upon a limited number of parental lines, leading to a narrow genetic base of the developed varieties. For accelerating genetic gain, there is an urgent need to include more diverse genetic material for improving traits for better adaptability and stress resistance in breeding populations. The present review summarizes the importance of black gram, the major biotic and abiotic stresses, available genetic and genomic resources, major traits for potential crop improvement, their inheritance, and the breeding approaches being used in black gram for the development of new varieties. [ABSTRACT FROM AUTHOR]

Mungbean [Vigna radiata (L.) R. Wilczek] is an agro‐economically important legume crop of Thailand. In recent years, mungbean has been gaining attention and popularity from consumers and industries for its dense nutrients. Although farmers, consumers, and processors prefer large‐seeded mungbeans, all mungbean cultivars available in Thailand are medium‐seeded. Therefore, a need was felt to develop new mungbean cultivars with large seed size that would fulfill the needs of farmers, consumers, and processors. In this study, we report the development of two new mungbean cultivars: 'KUML4' (Reg. no. CV‐354, PI 703288) and 'KUML8' (Reg. no. CV‐355, PI 703289). These cultivars were developed by pedigree and bulk‐selection methods. Standard yield trials revealed that KUML4 gave seed yields (SDY) of 1444.75 and 1316.38 kg ha−1, respectively, which was on par with check cultivars. The seed of KUML4 and KUML8 was larger than all of the check cultivars; their 100‐seed weights were 7.25 and 7.84 g, respectively, compared with 6.58 g, the mean of the check cultivars. Further, the genotype main effect plus genotype‐by‐environment analysis showed that KUML4 had good yield stability for its SDY. The yield trials under farmer fields and practices revealed that KUML4 gave SDY similar to the best check cultivar, 'Chai Nat 3' (CN3), whereas KUML8 gave a lower yield than CN3. The yield gap between the experimental research station and farmer field/practice was about 47%. In conclusion, KUML4 and KUML8 have shown high yield, large seed size, and early and uniform maturity. Core Ideas: Two mungbean cultivars with large seeds and high yield stability were developed for Thailand.The seed size of both cultivars is greater than that of all other cultivars.These large‐seeded cultivars will be preferred by farmers, traders, consumers, and processors. [ABSTRACT FROM AUTHOR]

Two bruchid species, Callosobruchus maculatus and Callosobruchus chinensis, are the most significant stored insect pests of tropical legume crops. Previously, we identified a major QTL, qBr6.1, controlling seed resistance to these bruchids in the cultivated zombi pea (Vigna vexillata) accession 'TVNu 240'. In this study, we have narrowed down the qBr6.1 region and identified a candidate gene conferring this resistance. Fine mapping using F2 and F2:3 populations derived from a cross between TVNu 240 and TVNu 1623 (susceptible) revealed the existence of two tightly linked QTLs, designated qBr6.1-A and qBr6.1-B, within the qBr6.1. The QTLs qBr6.1-A and qBr6.1-B explained 37.46% and 10.63% of bruchid resistance variation, respectively. qBr6.1-A was mapped to a 28.24 kb region containing four genes, from which the gene VvTaXI encoding a xylanase inhibitor was selected as a candidate gene responsible for the resistance associated with the qBr6.1-A. Sequencing and sequence alignment of VvTaXI from TVNu 240 and TVNu 1623 revealed a 1-base-pair insertion/deletion and five single-nucleotide polymorphisms (SNPs) in the 5′ UTR and 11 SNPs in the exon. Alignment of the VvTAXI protein sequences showed five amino acid changes between the TVNu 240 and TVNu 1623 sequences. Altogether, these results demonstrated that the VvTaXI encoding xylanase inhibitor is the candidate gene conferring bruchid resistance in the zombi pea accession TVNu 240. The gene VvTaXI will be useful for the molecular breeding of bruchid resistance in the zombi pea. [ABSTRACT FROM AUTHOR]

Pencil yam (Vigna lanceolata Benth.) (Phaseoleae, Fabaceae) is a herbaceous legume endemic to Australia. A previous morphological study suggested that pencil yam is a complex species of two or more related taxa with seven distinct morphological types (morphotypes) and, thus, taxonomic revision is necessary. In this study, we assessed genetic diversity and determined the genetic structure of a pencil yam collection of 62 accessions from seven morphotypes using 18 microsatellite (simple sequence repeat) markers with the aim to provide information for taxonomic study. In total, 138 alleles were detected with a mean of 7.67 alleles per locus. Polymorphism information content per marker varied between 0.06 and 0.90 with a mean of 0.61, while the overall gene diversity was 0.62. Bayesian clustering, principal coordinate, and neighbor-joining analyses consistently revealed that these accessions are grouped into two subpopulations with difference in number of alleles, allelic richness, and gene diversity. The population structure was not related to either morphotype or geographical origin. Gene diversity of V. lanceolata was higher than that of wild Vigna radiata (L.) Wilczek and wild Vigna umbellata (Thunb.) Ohwi & Ohashi, comparable with that of wild Vigna mungo (L.) Hepper, Vigna exilis Tateishi & Maxted, and Vigna grandiflora (Prain) Tateishi & Maxted, and lower than that of wild Vigna angularis (Willd.) Ohwi & Ohashi. These results indicated that the taxonomy of V. lanceolata should be revised and that its gene diversity was moderate compared with the other wild Vigna species. Key words: Vigna, microsatellite marker, simple sequence repeat, SSR. Vigna lanceolata Benth. (Phaseoleae, Fabaceae) est une legumineuse fourragere endemique de l'Australie. Une etude morphologique anterieure a suggere que V. lanceolata est une espece complexe comprenant au moins deux taxons et sept types morphologiques distincts (morphotypes), ce qui rend necessaire sa revision taxonomique. Dans cette etude, les auteurs ont evalue la diversite genetique et determine la structure genetique d'une collection de V. lanceolata comportant 62 accessions de sept morphotypes a l'aide de 18 marqueurs microsatellites (repetition de sequence simple), dans le but d'obtenir de l'information en vue de l'etude taxonomique. Au total, 138 alleles ont ete detectes, avec une moyenne de 7,67 alleles par locus. Le contenu informationnel du polymorphisme par marqueur variait de 0,06 a 0,90, avec une moyenne de 0,61, alors que la diversite genetique globale etait de 0,62. L'agregation bayesienne, les analyses en coordonnees principales et la methode de NJ ont revele systematiquement que ces accessions sont groupees en deux sous-populations qui different sur le plan du nombre d'alleles, de la richesse allelique et de la diversite genetique. La structure de la population n'etait pas reliee au morphotype ou a l'origine geographique. La diversite genetique de V. lanceolata etait plus grande que celle de Vigna radiata (L.) Wilczek et Vigna umbellata (Thunb.) Ohwi & Ohashi sauvages, comparable a celle de Vigna mungo (L.) Hepper sauvage, Vigna exilis Tateishi & Maxted, et Vigna grandiflora (Prain) Tateishi & Maxted, et plus faible que celle de Vigna angularis (Willd.) Ohwi & Ohashi sauvage. Ces resultats indiquaient que la taxonomie de V. lanceolata devrait etre revisee et que sa diversite genetique etait moderee comparativement a celle d'autres especes de Vigna sauvages. [Traduit par la Redaction] Mots-cles : Vigna, marqueur microsatellite, repetition de sequence simple, SSR., Introduction The genus Vigna (Phaseoleae, Fabaceae) is a large leguminous taxon comprising seven subgenera of 104 herbaceous species distributed in tropical and subtropical regions of Africa, Asia, America, and Australia [...]

Information to aid the selection of suitable cultivated areas remains meager for mung bean, despite it being a socio-economically important legume crop in Thailand. Hence, a user-friendly soil assessment tool is required to help properly choose planting areas. We aimed to provide a decision support system for mung bean cultivation in central Thailand. Soil suitability classes were performed using relevant factors and data essential for mung bean cultivation in 22 provinces in central Thailand. A decision support system was developed as soil map and mobile phone application using data based on soil suitability classes. Information of mung bean growth and yield grown in experimental fields with different soil suitability classes was used for preliminary validation. The main areas were very suitable (S1) and moderately suitable (S3) for mung bean plantation, accounting for 1,319,841 and 1,327,804 ha, respectively. The number of pods per plant and yield per plant of mung bean were higher in S1 areas (12.83–16.65 pods per plant and 8.35–12.43 g/plant, respectively) than in S3 areas. The mung bean yield was also greater in S1 areas (1613.8–2158.7 kg/ha) than in S3 areas (735.8–1138.6 kg/ha). The findings suggest the possibility of using developed decision support system. [ABSTRACT FROM AUTHOR]

Vegetable soybean, popularly known as edamame in Japan and mao dou in China is a specialty soybean. Green pods with physiologically mature beans are harvested, and whole pods or shelled beans are used as a fresh or frozen vegetable. Vegetable soybeans are prepared in diverse ways, and they are highly nutritious, with excellent taste properties. Unlike grain soybeans, it is perishable. In this review, the chronological progression of area, production, export, import, and expansion of vegetable soybeans and potential for further expansion is discussed. Available information on current ongoing research and development activities in various countries around the world are presented, and their relevance is discussed. At present, the production and consumption of vegetable soybeans are mainly in East and Southeast Asia, with Japan as the largest importing country that dictates the global market. However, interest and trend in cultivation of this crop in other regions has increased significantly. Lack of germplasm or suitable varieties is a major constraint in vegetable soybean production and expansion in countries outside East and Southeast Asia. Most of the vegetable soybean varieties are genetically related and are susceptible to biotic and abiotic stresses. Extensive research and breeding of vegetable soybeans are still restricted in a few countries such as China, Japan, Taiwan and the USA. The need for focused research and development activities with concern for the environment, farmers' and processors' profit, consumers' preference, quality, and nutrition are emphasized. [ABSTRACT FROM AUTHOR]

Pea (Pisum sativum L.) is an important legume crop for both food and feed. Bruchids (Callosobruchus spp.) are destructive insect pests of pea in the field and during storage. In this study, we identified a major quantitative trait locus (QTL) controlling seed resistance to C. chinensis (L.) and C. maculatus (Fab.) in field pea using F2 populations derived from a cross between PWY19 (resistant) and PHM22 (susceptible). QTL analysis in the two F2 populations grown in different environments consistently identified a single major QTL, qPsBr2.1, controlling the resistance to both bruchid species. qPsBr2.1 was mapped onto linkage group 2 between DNA markers 18339 and PSSR202109 and explained 50.91% to 70.94% of the variation in resistance, depending on the environment and bruchid species. Fine mapping narrowed down qPsBr2.1 to a genomic region of 1.07 Mb on chromosome 2 (chr2LG1). Seven annotated genes were found in this region, including Psat2g026280 (designated as PsXI), which encodes a xylanase inhibitor and was considered as a candidate gene for bruchid resistance. PCR amplification and sequence analysis of PsXI suggested the presence of an insertion of unknown length in an intron of PWY19, which causes variation in the open reading frame (ORF) of PsXI. Moreover, the subcellular localization of PsXI differed between PWY19 and PHM22. These results together suggested that PsXI encoding xylanase inhibitor is responsible for the bruchid resistance of the field pea PWY19. [ABSTRACT FROM AUTHOR]

In this study, genetic diversity and structure of 474 cultivated and 19 wild lablab (Lablab purpureus) accessions. were determined using 15 nuclear and 6 chloroplast SSR markers. The overall gene diversity was relatively low (0.3441). Gene diversity in the wild accessions (0.6059) was about two-folds greater than that in the cultivated accessions. In the wild accessions, gene diversity was greatest in the southern Africa, followed by East Africa. In the cultivated accessions, gene diversity was highest in the eastern Africa. The results suggested that South Africa is the center of origin and East Africa is the center of domestication of lablab. Different cluster analyses showed that 2-seeded-pod cultivated accessions (ssp. uncinatus) were clustered with wild accessions and that 4–(6)-seeded-pod cultivated accessions (ssp. purpureus and bengalensis) were intermingled. UPGMA tree suggested that ssp. purpureus and bengalensis were domesticated from 4-seeded-pod wild accessions of southern Africa. Haplotype network analysis based on nuclear SSRs revealed two domestication routes; the ssp. uncinatus is domesticated from 2-seeded-pod wild lablab (wild spp. uncinatus) from East Africa (Ethiopia), while the ssp. purpureus and bengalensis are domesticated from 4-seeded-pod wild lablab from Central Africa (Rwanda). These results are useful for understanding domestication and revising classification of lablab. [ABSTRACT FROM AUTHOR]

Vigna reflexo-pilosa (créole bean) is a wild legume belonging to the subgenus Ceratoropis and is widely distributed in Asia. Créole bean is the only tetraploid species in the genus Vigna , and it has been shown to derive from the hybridization of Vigna hirtella and Vigna trinervia. In this study, we combined the long-read PacBio technology with the chromatin contact mapping (Hi-C) technique to obtain a chromosome-level assembly of V. reflexo-pilosa. The final assembly contained 998,724,903 bases with an N50 length of 42,545,650 bases. Our gene prediction recovered 99.4% of the highly conserved orthologs based on the BUSCO analysis. To investigate homoeolog expression bias and expression level dominance in the tetraploid, we also sequenced and assembled the genomes of its progenitors. Overall, the majority of the homoeolog pairs (72.9%) displayed no expression bias, and among those that exhibited biased expression, 16.3% showed unbalanced homoeolog expression bias toward the V. trinervia subgenome. Moreover, 41.2% and 36.2% of the expressed gene pairs exhibited transgressive expression and expression level dominance, respectively. Interestingly, the genome-wide expression level dominance in the tetraploid was biased toward the V. trinervia subgenome. The analysis of methylation patterns also revealed that the average methylation levels in coding regions were higher in the V. hirtella subgenome than those in the V. trinervia subgenome. The genomic/transcriptomic resources for these three species are useful not only for the development of elite cultivars in Vigna breeding programs but also to researchers studying comparative genomics and investigating genomic/epigenomic changes following polyploid events. [ABSTRACT FROM AUTHOR]

Soybean rust (SBR) caused by the fungus Phakopsora pachyrhizi is an important folia disease of soybean (Glycine max). In this study, we identified QTLs controlling SBR in Chiang Mai 5 (CM5), an SBR-resistant cultivar developed by induced mutation breeding. A recombinant inbred line (RIL) population of 108 lines developed from a cross between Sukhothai 2 (SKT2, a susceptible cultivar) and CM5 was evaluated for SBR resistance under field conditions in Thailand. QTL analysis for the resistance in the RIL population identified a single QTL, qSBR18.1, for resistance. qSBR18.1 was mapped to a 212-kb region on chromosome 18 between simple sequence repeat markers Satt288 and sc21_3420 and accounted for 21.31–35.09% depending on the traits evaluated for resistance. The qSBR18.1 interval overlapped with genomic regions containing resistance to P. pachyrhizi 4 (Rpp4), a locus for SBR resistance. Three tightly linked genes, Glyma.18G226250, Glyma.18G226300, and Glyma.18G226500, each encoding leucine-rich repeat-containing protein, were identified as candidate genes for SBR resistance at the qSRB18.1. The qSBR18.1 would be useful for breeding of SBR resistance. [ABSTRACT FROM AUTHOR]

The objective of this research was to determine the genetic diversity and population structure of natural populations of two rare wild species of Asian Vigna (Phaseoleae, Fabaceae), Vigna exilis Tateishi & Maxted and Vigna grandiflora (Prain) Tateishi & Maxted, from Thailand. Employing 21 simple sequence repeat markers, 107 and 85 individuals from seven and five natural populations of V. exilis and V. grandiflora, respectively, were analyzed. In total, the markers detected 196 alleles for V. exilis and 219 alleles for V. grandiflora. Vigna exilis populations showed lower average values in number of alleles, allelic richness, observed heterozygosity, gene diversity, and outcrossing rate than V. grandiflora populations, namely 58.00% versus 114.60%, 51.96% versus 74.80%, 0.02% versus 0.18%, 0.40% versus 0.66%, and 3.24% versus 17.41%, respectively. Pairwise FST among populations demonstrated that V. exilis was much more differentiated than V. grandiflora. Analysis of molecular variance revealed that 41.83% and 15.06% of total variation resided among the populations of V. exilis and V. grandiflora, respectively. Seven and two genetic clusters were detected for V. grandiflora and V. exilis by STRUCTURE analysis. Our findings suggest that different strategies are required for in situ conservation of the two species. All V. exilis populations, or as many as possible, should be conserved to protect genetic resources of this species, while a few V. grandiflora populations can capture the majority of its genetic variation. Key words: Vigna, microsatellite marker, mung bean, population genetics, simple sequence repeat. Resume : L'auteur a cherche a determiner la diversite genetique et la structure des populations naturelles de deux especes indigenes rares de Vigna (Phaseoleae, Fabaceae), Vigna exilis Tateishi & Maxted, et Vigna grandiflora (Prain) Tateishi & Maxted, de Thailande. En utilisant des marqueurs de 21 sequences repetitives simples, il a analyse 107 et 85 individus provenant de sept et cinq populations naturelles du V. exilis et du V. grandiflora, respectivement. Les marqueurs ont detectes 196 alleles pour V. exilis et 219 alleles pour V. grandiflora. Les populations du V. exilis montrent des valeurs moyennes plus faibles pour le nombre d'alleles, la richesse allelique, l'heterozygocite observee, la diversite des genes et le taux d'heterocroisements, que chez les populations du V. grandiflora, etant de 58,00% vs 114,60%, 51,96% vs 74,80%, 0,02% vs 0,18%, 0,40% vs 0,66%, et 3,24% vs 17,41%, respectivement. La FSTpairee entre populations demontre que le V. exilis estbeaucoup plus differencie que le V. grandiflora. L'analyse de la variance moleculaire revele que 41,83% et 15,06% de la variation totale se retrouve dans les populations du V. exilis et du V. grandiflora, respectivement. En utilisant l'analyse STRUCTURE, l'auteur a detecte sept et deux clusters genetiques chez les V. grandiflora et le V. exilis. Ces constatations suggerent que differentes strategies sont necessaires pour la conservation in situ des deux especes. On devrait conserver toutes ou autant de populations que possible du V. exilis pour proteger la ressource genetique de cette espece, alors que quelques populations du V. grandiflora peuvent retenir la majorite de sa variation genetique. [Traduit par la Redaction] Mots-cles: Vigna, marqueur microsatellite, haricot mungo, genetique des populations, sequences repetitives simples., Introduction Vigna subgenus Ceratotropis (Phaseoleae, Fabaceae), commonly known as Asian Vigna, is composed of about 23 species, with Asia as their center of diversification. Species in this subgenus are classified [...]

Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a [BC.sub.1][F.sub.1] ((JP81610 x TVnu457) x JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genotype. The markers on LG11 were also distorted in the rice bean (Vigna umbellata (Thunb.) Ohwi & Ohashi) map, suggesting the presence of common segregation distortion factors in Vigna species on this LG. One major and six minor QTLs were identified for pod length variation between yardlong bean and wild cowpea. Using flanking markers, six of the seven QTLs were confirmed in an [F.sub.2] population of JP81610 x TVnu457. The molecular linkage map developed and markers linked to pod length QTLs would be potentially useful for yardlong bean and cowpea breeding. Key words: cowpea, linkage map, microsatellite markers, Vigna unguiculata, yardlong bean. La dolique asperge (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) est l'une des legumineuses potageres les plus importantes en Asie. Les objectifs de ce travail etaient de developper une carte genetique de la dolique asperge en employant des marqueurs SSR provenant d'especes apparentees du genre Vigna et d'identifier des QTL pour la longueur de la gousse. La carte produite compte 226 marqueurs SSR provenant du niebe (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), du haricot azuki (Vigna angularis (Willd.) Ohwi & Ohashi) et du haricot mungo (Vigna radiata (L.) Wilczek) au sein d'une population BC1F1 ((JP81610 x TVnu457) x JP81610) derivee d'un croisement entre l'accession JP81610 de la dolique asperge et l'accession TVnu457 du niebe sauvage (Vigna unguiculata subsp. unguiculata var. spontanea). Les marqueurs ont forme 11 groupes de liaison (LG) s'etendant sur 852,4 cM, pour une distance moyenne entre les marqueurs de 3,96 cM. Tous les marqueurs sur le LG11 presentaient un biais de segregation en faveur du genotype de la dolique asperge JP81610. Les marqueurs du LG11 presentaient egalement un biais au sein de la carte genetique du haricot riz (Vigna umbellata (Thunb.) Ohwi & Ohashi), ce qui suggere la presence partagee de facteurs causant la distorsion genetique chez les especes du genre Vigna sur ce groupe de liaison. Un QTL majeur et six QTL mineurs ont ete identifies pour expliquer la variation pour la longueur des gousses entre la dolique asperge et le niebe sauvage. A l'aide de marqueurs voisins, six des sept QTL ont ete confirmes au sein d'une population [F.sub.2] JP81610 x TVnu457. La carte genetique produite et les marqueurs lies a des QTL pour la longueur des gousses seront potentiellement utiles en amelioration genetique de la dolique asperge et du niebe. Mots-cles : niebe, carte genetique, marqueurs microsatellites, Vigna unguiculata, dolique asperge. [Traduit par la Redaction], Introduction Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Southeast and East Asia. It [...]