BARC/PUB/10//0594

 
 

Identification of quantitative trait loci for bruchid (Callosobruchus maculatus) resistance in black gram [Vigna mungo (L.) Hepper]

 
     
 
Author(s)

Souframanien, J.; Gupta, S. K.; Gopalakrishna, T.

ABSTRACT

An inter-subspecific mapping population was generated by crossing V. mungo var. mungo (cv. TU 94-2, bruchid susceptible) and V. mungo var. silvestris (bruchid resistant). About 37.8% of the bruchid completed their lifecycle on seeds of V. mungo var. silvestris compared with 100% on the susceptible variety TU 94-2. The total developmental period of C. maculatus on Vigna mungo var. silvestris was considerably extended (88 days as compared with 34 days on TU 94-2). A genetic linkage map constructed using recombinant inbred lines (RILs) in F9 generation with 428 markers [86 random amplified polymorphic DNA (RAPD), 47 simple sequence repeat (SSR), 41 inter-SSR (ISSR), 254 amplified fragment length polymorphism (AFLP)] was used for QTL detection. One hundred four individuals were used for detection of QTLs associated with bruchid resistance. The RILs exhibited a high level of variation in percentage adult emergence (0-100%) and developmental period (0-105 days). Two QTLs, Cmrae1. 1 and Cmrae1. 2, were identified for percentage adult emergence, on linkage group (LG) 3 and 4, respectively. For developmental period, six QTLs were identified, with two QTLs (Cmrdp1. 1 and Cmrdp1. 2) on LG 1, three QTLs (Cmrdp1. 3, Cmrdp1. 4, and Cmrdp1. 5) on LG 2, and one QTL (Cmrdp1. 6) on LG 10. 

 
 
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