@inproceedings{icrisat10304, month = {February}, booktitle = {InterDrought-V}, year = {2017}, title = {Fine mapping studies identified a 113 kb region within ?QTL-hotspot\_a? for seed weight and drought related traits in chickpea}, pages = {210}, author = {S M Kale and D Jaganathan and M Roorkiwal and M Thudi and R Purushothaman and M Praveenkumar and L Krishnamurthy and P B Kavi Kishor and P M Gaur and R K Varshney}, keywords = {Fine mapping studies, QTL-hotspot, Drought related traits, Chickpea}, url = {http://oar.icrisat.org/10304/}, abstract = {A ?QTL-hotspot? region of 7 Mb size for drought component traits was identified on CaLG04, using a recombinant inbred line (RIL) population (ICC 4958 {$\times$} ICC 1882) in chickpea. Further, skimbased genotyping by sequencing (GBS) approach with large SNP markers delimited the ?QTL-hotspot? region into two sub-regions; viz, ?QTL-hotspot\_a? of 139.22 kb and ?QTL-hotspot\_b? of 153.36 kb, on the kabuli draft genome sequence. In order to validate and identify more recombinations in the sub-regions for further refinement, a fine mapping population with 1,911 lines was developed. Flanking markers of the two ?QTL-hotspot? sub-regions were converted to KASPar assays and used to screen the fine mapping population consisting of 1,911 lines. As a result, 19 F2:3 recombinant families were identified. These families were phenotyped for seed weight and other drought-related traits. Comparison of genotype and phenotype data identified a genomic region of {\texttt{\char126}}113 Kb size within ?QTL-hotspot\_a? responsible for 100 seed weight (100SDW) and other drought-related traits in chickpea. Subsequently, a syntenic study between the refined ?QTL-hotpsot? region and desi genome identified a 2 Mb region on Ca\_LG\_4 pseudomolecule. Whole genome re-sequencing (WGRS) analysis of selected lines from each recombinant family identified several non-synonymous and InDel mutations within important candidate genes. Functional validation of these genes will help decipher the mechanism of drought stress tolerance in chickpea.} }