Tayade, A T and Motagi, B N and Jadhav, M P and Nadaf, A S and Koti, R V and Gangurde, S S and Sharma, V and Varshney, R K and Pandey, M K and Bhat, R S (2022) Genetic mapping of tolerance to iron deficiency chlorosis in peanut (Arachis hypogaea L.). Euphytica, 218. pp. 1-10. ISSN 1573-5060
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Abstract
Iron deficiency chlorosis (IDC) under calcareous and alkaline soils is a significant abiotic stress affecting the growth and yield of peanut. In this study, the genomic regions governing IDC tolerance were mapped using a recombinant inbred line (RIL) population derived from TMV 2 (susceptible to IDC) and TMV 2-NLM (tolerant to IDC), which was phenotyped during the rainy seasons of 2019 and 2020 in the iron-deficient calcareous plots. The best linear unbiased prediction (BLUP) values for IDC tolerance traits like visual chlorotic rating (VCR), and SPAD chlorophyll meter reading (SCMR) were used for QTL analysis along with a genetic map carrying 700 GBS-derived SNP, AhTE and SSR markers. In total, 11 and 12 main-effect QTLs were identified for VCR and SCMR, respectively. Among them three QTLs were major with the phenotypic variance explained (PVE) of 10.3–34.4% for VCR, and two QTL were major for SCMR with PVE of 11.5–11.7%. A region (159.3–178.3 cM) on chromosome Ah13 carrying two QTLs (one each for VCR and SCMR) was consistent with the previous report. A SNP marker, Ah14_138037990 identified from single marker analysis for VCR was located in the intronic region of the gene Arahy.QA0C1, which is important for protein-binding. Overall, this study identified new QTLs and also validated QTL for IDC tolerance. These genomic resources could be useful for genomics-assisted breeding of peanut for IDC tolerance.
| Item Type: | Article |
|---|---|
| Divisions: | Center of Excellence in Genomics and Systems Biology |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Peanut, Tolerance to iron deficiency chlorosis (IDC), VCR, SCMR, High-density genetic map, Major main effect QTL, Candidate gene |
| Subjects: | Mandate crops > Groundnut Others > Genetics and Genomics |
| Depositing User: | Mr Nagaraju T |
| Date Deposited: | 14 Mar 2024 05:32 |
| Last Modified: | 14 Mar 2024 05:32 |
| URI: | http://oar.icrisat.org/id/eprint/12579 |
| Official URL: | https://link.springer.com/article/10.1007/s10681-0... |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | Authors acknowledge the support of Department of Genetics and Plant Breeding, College of Agriculture, Vijayapur for phenotyping and Institute of Agri-Biotechnology (IABT), UAS, Dharwad and Centre of Excellence in Genomics & Systems Biology (CEG&SB), ICRISAT, Patancheru, India for SNP genotyping/sequencing work. The financial support received from ICAR-NASF (New Delhi) is also acknowledged. |
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