CLAVATA signaling pathway genes modulating flowering time and flower number in chickpea

Basu, U and Narnoliya, L and Srivastava, R and Sharma, A and Bajaj, D and Daware, A and Thakro, V and Malik, N and Upadhyaya, H D and Tripathi, S and Hegde, V S and Tyagi, A K and Parida, S K (2019) CLAVATA signaling pathway genes modulating flowering time and flower number in chickpea. Theoretical and Applied Genetics (TSI), 132 (7). pp. 2017-2038. ISSN 0040-5752

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Abstract

Unraveling the genetic components involved in CLAVATA (CLV) signaling is crucial for modulating important shoot apical meristem (SAM) characteristics and ultimately regulating diverse SAM-regulated agromorphological traits in crop plants. A genome-wide scan identified 142 CLV1-, 28 CLV2- and 6 CLV3-like genes, and their comprehensive genomic constitution and phylogenetic relationships were deciphered in chickpea. The QTL/fine mapping and map-based cloning integrated with high-resolution association analysis identified SNP loci from CaCLV3_01 gene within a major CaqDTF1.1/CaqFN1.1 QTL associated with DTF (days to 50% flowering) and FN (flower number) traits in chickpea, which was further ascertained by quantitative expression profiling. Molecular haplotyping of CaCLV3_01 gene, expressed specifically in SAM, constituted two major haplotypes that differentiated the early-DTF and high-FN chickpea accessions from late-DTF and low-FN. Enhanced accumulation of transcripts of superior CaCLV3_01 gene haplotype and known flowering promoting genes was observed in the corresponding haplotype-introgressed early-DTF and high-FN near-isogenic lines (NILs) with narrow SAM width. The superior haplotype-introgressed NILs exhibited early-flowering, high-FN and enhanced seed yield/productivity without compromising agronomic performance. These delineated molecular signatures can regulate DTF and FN traits through SAM proliferation and differentiation and thereby will be useful for translational genomic study to develop early-flowering cultivars with enhanced yield/productivity.

Item Type:	Article
Divisions:	Research Program : Genetic Gains
CRP:	UNSPECIFIED
Uncontrolled Keywords:	chickpea, early flowering, chickpea cultivars, CLAVATA gene, crop productivity
Subjects:	Others > Crop Improvement Mandate crops > Chickpea Others > Genetics and Genomics
Depositing User:	Mr Ramesh K
Date Deposited:	13 Aug 2019 06:40
Last Modified:	13 Aug 2019 06:40
URI:	http://oar.icrisat.org/id/eprint/11240
Official URL:	https://doi.org/10.1007/s00122-019-03335-y
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	The financial support provided by (Grant No. 102/IFD/SAN/2161/2013-14) the Department of Biotechnology (DBT), Ministry of Science and Technology, Government of India, is acknowledged. UB, LN and VT acknowledge the UGC (University Grants Commission) and DBT for Senior/Junior Research Fellowship awards.
Links:	Google Scholar

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