Molecular mapping of dry root rot resistance genes in chickpea (Cicer arietinum L.)

Dry root rot (DRR) caused by Rhizoctonia bataticola [(Taub.) Butler] is an emerging disease of chickpea (Cicer arietinum L.) and a serious constraint to production in warm arid regions. To identify the genomic regions conferring resistance DRR, total 182 F9 derived Recombinant Inbred Lines (RILs) were developed from cross between susceptible line BG 212 moderately resistant breeding ICCV 08305. The parental lines RILs screened against Rb 6 isolate R. using paper towel method under controlled environment at ICRISAT during 2016 2017. genotyped with cost-effective SNP genotyping platform, Affymetrix® Axiom®CicerSNP array. As result, high-density genetic map 13,110 markers spanning 1224.11 cM average inter marker distance 0.09 was developed. A single minor QTL (‘qDRR-8’) explaining 6.70% PVE LOD scores 3.34 identified on CaLG08 for DRR which could be further explored mining candidate genes linked validated application marker-assisted selection programs.