High confidence QTLs and key genes identified using Meta-QTL analysis for enhancing heat tolerance in chickpea (Cicer arietinum L.)

Kumar, R and Sharma, V K and Rangari, S K and Jha, U C and Sahu, A and Paul, P J and Gupta, S and Gangurde, S S and Kudapa, H and Mir, R R and Gaur, P M and Varshney, R K and Elango, D and Thudi, M (2023) High confidence QTLs and key genes identified using Meta-QTL analysis for enhancing heat tolerance in chickpea (Cicer arietinum L.). Frontiers in Plant Science (TSI), 14. 01-09. ISSN 1664-462X

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Abstract

The rising global temperatures seriously threaten sustainable crop production, particularly the productivity and production of heat-sensitive crops like chickpeas. Multiple QTLs have been identified to enhance the heat stress tolerance in chickpeas, but their successful use in breeding programs remains limited. Towards this direction, we constructed a high-density genetic map spanning 2233.5 cM with 1069 markers. Using 138 QTLs reported earlier, we identified six Meta-QTL regions for heat tolerance whose confidence interval was reduced by 2.7-folds compared to the reported QTLs. Meta-QTLs identified on CaLG01 and CaLG06 harbor QTLs for important traits, including days to 50% flowering, days to maturity, days to flower initiation, days to pod initiation, number of filled pods, visual score, seed yield per plant, biological yield per plant, chlorophyll content, and harvest index. In addition, key genes identified in Meta-QTL regions like Pollen receptor-like kinase 3 (CaPRK3), Flowering-promoting factor 1 (CaFPF1), Flowering Locus C (CaFLC), Heat stress transcription factor A-5 (CaHsfsA5), and Pollen-specific leucine-rich repeat extensins (CaLRXs) play an important role in regulating the flowering time, pollen germination, and growth. The consensus genomic regions, and the key genes reported in this study can be used in genomics-assisted breeding for enhancing heat tolerance and developing heat-resilient chickpea cultivars.

Item Type:	Article
Divisions:	Global Research Program - Accelerated Crop Improvement
CRP:	UNSPECIFIED
Uncontrolled Keywords:	candidate genes, confidence interval, heat stress, Meta-QTLs, recombinant inbred lines
Subjects:	Mandate crops > Chickpea Others > Genetics and Genomics
Depositing User:	Mr Nagaraju T
Date Deposited:	01 Mar 2024 10:36
Last Modified:	01 Mar 2024 10:36
URI:	http://oar.icrisat.org/id/eprint/12529
Official URL:	https://www.frontiersin.org/journals/plant-science...
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	RK acknowledges the Department of Biotechnology and RPCAU, Pusa for the DBT-JRF and university fellowship to his Ph.D.
Links:	Google Scholar

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