Publication Overview
Abstract Understanding the genetic basis of photosynthetic efficiency (PE) contributing to
enhanced seed yield per plant (SYP) is vital for genomics‐assisted crop improvement
of chickpea. The current study employed an integrated genomic strategy involving
photosynthesis pathway gene‐based association mapping, genome‐wide association
study, quantitative trait loci (QTL) mapping, and expression profiling. This identified
16 potential single nucleotide polymorphism loci linked to major QTLs underlying
16 candidate genes significantly associated with PE and SYP traits in chickpea. The allelic
variants were tightly linked to positively interacting QTLs regulating both enhanced
PE and SYP traits as exemplified by a chlorophyll A‐B binding protein‐coding gene. The
leaf tissue‐specific pronounced up‐regulated expression of 16 associated genes in
germplasm accessions and homozygous individuals of mapping population was evident.
Such combinatorial genomic strategy coupled with gene haplotype‐specific association
and in silico protein–protein interaction study delineated natural alleles and superior
haplotypes from a chlorophyll A‐B binding (CAB) protein‐coding gene and its interacting
gene, Timing of CAB Expression 1 (TOC1), which appear to be most promising
candidates in modulating chickpea PE and SYP traits. These functionally pertinent
molecular signatures identified have efficacy to drive marker‐assisted selection for
developing PE‐enriched cultivars with high seed yield in chickpea.
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