Genetic dissection of photosynthetic efficiency traits for enhancing seed yield in chickpea

Basu, U and Bajaj, D and Sharma, A and Malik, N and Daware, A and Narnoliya, L and Thakro, V and Upadhyaya, H D and Kumar, R and Tripathi, S and Bharadwaj, C and Tyagi, A K and Parida, S K (2018) Genetic dissection of photosynthetic efficiency traits for enhancing seed yield in chickpea. Plant, Cell & Environment (TSI). pp. 1-16. ISSN 0140-7791

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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, QTL mapping and expression profiling. This identified 16 potential SNP 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 as well as in silico protein‐protein interaction study delineated natural alleles and superior haplotypes from a chlorophyll A‐B binding protein‐coding gene and its interacting gene, Timing of CAB Expression 1, 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.

Item Type: Article
Divisions: Research Program : Genetic Gains
CRP: UNSPECIFIED
Uncontrolled Keywords: chickpea, GWAS, photosynthesis, QTL, SNP, yield
Subjects: Mandate crops > Chickpea
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 16 May 2018 09:48
Last Modified: 27 Dec 2018 12:51
URI: http://oar.icrisat.org/id/eprint/10670
Official URL: http://dx.doi.org/10.1111/pce.13319
Projects: UNSPECIFIED
Funders: Department of Biotechnology (DBT), Ministry of Science and Technology, Government of India
Acknowledgement: The financial support provided by the Department of Biotechnology (DBT), Ministry of Science and Technology, Government of India, is acknowledged.
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