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Zombi pea ( Vigna vexillata ) is a legume crop that is resistant to several biotic and abiotic stresses.  Callosobruchus maculatus  and  Callosobruchus chinensis  are serious stored-insect pests of legume crops. We constructed a high-density linkage map and performed quantitative trait loci (QTLs) mapping for resistance to these insect species in zombi pea. An F 2  population of 198 individuals from a cross between ‘TVNu 240’ (resistant) and ‘TVNu 1623’ (susceptible) varieties was used to construct a linkage map of 6,529 single nucleotide polymorphism markers generated from sequencing amplified fragments of specific loci. The map comprised 11 linkage groups, spanning 1,740.9 cM, with an average of 593.5 markers per linkage group and an average distance of 0.27 cM between markers. High levels of micro-synteny between  V .  vexillata  and cowpea ( Vigna unguiculata ), mungbean ( Vigna radiata ), azuki bean ( Vigna angularis ) and common bean ( Phaseolus vulgaris ) were found. One major and three minor QTLs for  C .  chinensis  resistance and one major and one minor QTLs for  C .  maculatus  resistance were identified. The major QTLs for resistance to  C .  chinensis  and  C .  maculatus  appeared to be the same locus. The linkage map developed in this study will facilitate the identification of useful genes/QTLs in zombi pea.

Construction of a high density linkage map and genome dissection of bruchid resistance in zombi pea (Vigna vexillata (L.) A. Rich)