Genetic mapping of QTLs for drought tolerance in chickpea (Cicer arietinum L.)

    Kushwah, A and Bhatia, D and Barmukh, R and Singh, I and Singh, G and Bindra, S and Vij, S and Chellapilla, B and Pratap, A and Roorkiwal, M and Kumar, S and Varshney, R K and Singh, S (2022) Genetic mapping of QTLs for drought tolerance in chickpea (Cicer arietinum L.). Frontiers in Genetics (TSI), 13. 01-15. ISSN 1664-8021

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    Abstract

    Chickpea yield is severely affected by drought stress, which is a complex quantitative trait regulated by multiple small-effect genes. Identifying genomic regions associated with drought tolerance component traits may increase our understanding of drought tolerance mechanisms and assist in the development of drought-tolerant varieties. Here, a total of 187 F8 recombinant inbred lines (RILs) developed from an interspecific cross between drought-tolerant genotype GPF 2 (Cicer arietinum) and droughtsensitive accession ILWC 292 (C. reticulatum) were evaluated to identify quantitative trait loci (QTLs) associated with drought tolerance component traits. A total of 21 traits, including 12 morpho-physiological traits and nine rootrelated traits, were studied under rainfed and irrigated conditions. Composite interval mapping identified 31 QTLs at Ludhiana and 23 QTLs at Faridkot locations for morphological and physiological traits, and seven QTLs were identified for root-related traits. QTL analysis identified eight consensus QTLs for six traits and five QTL clusters containing QTLs for multiple traits on linkage groups CaLG04 and CaLG06. The identified major QTLs and genomic regions associated with drought tolerance component traits can be introgressed into elite cultivars using genomics-assisted breeding to enhance drought tolerance in chickpea.

    Item Type: Article
    Divisions: Center of Excellence in Genomics and Systems Biology
    CRP: UNSPECIFIED
    Uncontrolled Keywords: genetic mapping, ddRAD-seq, single nucleotide polymorphism (SNP), quantitative trait locus (QTL), root system architecture
    Subjects: Mandate crops > Chickpea
    Others > Genetics and Genomics
    Depositing User: Mr Nagaraju T
    Date Deposited: 05 Dec 2023 04:33
    Last Modified: 05 Dec 2023 04:33
    URI: http://oar.icrisat.org/id/eprint/12322
    Official URL: https://www.frontiersin.org/articles/10.3389/fgene...
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: RKV acknowledges the financial support from Bill and Melinda Gates Foundation through the Tropical Legumes III project. The INSPIRE research grant was provided to AK by the Department of Science and Technology (DST), New Delhi, India, and research grants were provided under the project “Incentivizing Research in Agriculture” and Consortia Research Platform on Molecular Breeding by the Indian Council of Agricultural Research, New Delhi to SS for carrying out the research are highly acknowledged. RB acknowledges funding support from the Council of Scientific and Industrial Research (CSIR), Government of India, for the award of a research fellowship.
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