A combinatorial approach of comprehensive QTL-based comparative genome mapping and transcript profiling identified a seed weight-regulating candidate gene in chickpea
Impact factor: 5.228 (Year: 2015)
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Citation
Deepak Bajaj, Hari D. Upadhyaya, Yusuf Khan, Shouvik Das, Saurabh Badoni, Tanima Shree, Vinod Kumar, Shailesh Tripathi, C. L. L. Gowda, Sube Singh, Shivali Sharma, Akhilesh K. Tyagi, Debasis Chattopadhyay, Swarup K. Parida. (17/7/2015). A combinatorial approach of comprehensive QTL-based comparative genome mapping and transcript profiling identified a seed weight-regulating candidate gene in chickpea. Scientific Reports, 5 (9264), pp. 1-14.
Abstract
High experimental validation/genotyping success rate (94–96%) and intra-specific polymorphic potential
(82–96%) of 1536 SNP and 472 SSR markers showing in silico polymorphism between desi ICC 4958 and
kabuli ICC 12968 chickpea was obtained in a 190 mapping population (ICC 4958 3 ICC 12968) and 92
diverse desi and kabuli genotypes. A high-density 2001 marker-based intra-specific genetic linkage map
comprising of eight LGs constructed is comparatively much saturated (mean map-density: 0.94 cM) in
contrast to existing intra-specific genetic maps in chickpea. Fifteen robust QTLs (PVE: 8.8–25.8% with
LOD: 7.0–13.8) associated with pod and seed number/plant (PN and SN) and 100 seed weight (SW) were
identified and mapped on 10 major genomic regions of eight LGs. One of 126.8 kb major genomic region
harbouring a strong SW-associated robust QTL (Caq’SW1.1: 169.1–171.3 cM) has been delineated by
integrating high-resolution QTL mapping with comprehensive marker-based comparative genome
mapping and differential expression profiling. This identified one potential regulatory SNP (G/A) in the
cis-acting element of candidate ERF (ethylene responsive factor) TF (transcription factor) gene governing
seed weight in chickpea. The functionally relevant molecular tags identified have potential to be utilized for
marker-assisted genetic improvement of chickpea
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