Identification of quantitative trait loci associated with iron deficiency chlorosis resistance in groundnut ( Arachis hypogaea )

Pattanashetti, S K and Pandey, M K and Naidu, G K and Vishwakarma, M K and Singh, O K and Shasidhar, Y and Boodi, I H and Biradar, B D and Das, R R and Rathore, A and Varshney, R K and Morris, B (2020) Identification of quantitative trait loci associated with iron deficiency chlorosis resistance in groundnut ( Arachis hypogaea ). Plant Breeding (TSI), 139 (4). pp. 790-803. ISSN 0179-9541

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Abstract

Iron deficiency chlorosis is an important abiotic stress affecting groundnut production worldwide in calcareous and alkaline soils with a pH of 7.5–8.5. To identify genomic regions controlling iron deficiency chlorosis resistance in groundnut, the recombinant inbred line population from the cross TAG 24 × ICGV 86031 was evaluated for associated traits like visual chlorosis rating and SPAD chlorophyll meter reading across three crop growth stages for two consecutive years. Thirty-two QTLs were identified for visual chlorosis rating (3.9%–31.8% phenotypic variance explained [PVE]) and SPAD chlorophyll meter reading [3.8%–11% PVE] across three stages over 2 years. This is the first report of identification of QTLs for iron deficiency chlorosis resistance- associated traits in groundnut. Three major QTLs (>10% PVE) were identified at severe stage, while majority of other QTLs were having small effects. Interestingly, two major QTLs for visual chlorosis rating at 60 days (2013) and 90 days (2014) were located at same position on LG AhXIII. The identified QTLs/markers after validation across diverse genetic material could be used in genomics-assisted breeding.

Item Type:	Article
Divisions:	Research Program : Genetic Gains
CRP:	CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC)
Uncontrolled Keywords:	Groundnut, Iron deficiency chlorosis resistance, QTL mapping, SPAD chlorophyll meter reading, Visual chlorosis ting
Subjects:	Others > Abiotic Stress Mandate crops > Groundnut Others > Genetics and Genomics
Depositing User:	Mr Arun S
Date Deposited:	05 Sep 2020 16:22
Last Modified:	05 Sep 2020 16:22
URI:	http://oar.icrisat.org/id/eprint/11595
Official URL:	https://doi.org/10.1111/pbr.12815
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	Authors would like to thank Dr Vincent Vadez, ICRISAT, Patancheru (India) for supplying the seeds of the RIL population for phenotyping and also for critically reviewing this paper. This work was undertaken as part of the post-graduate research of Omprakash and Ishwar at College of Agriculture, Vijayapur under University of Agricultural Sciences, Dharwad and CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC). Thanks to Bill and Melinda Gates Foundation (BMGF) for supporting part of this research through Tropical Legumes (III) project. ICRISAT is a member of CGIAR Consortium.
Links:	Google Scholar

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