Journal article
Genetic mapping of drought tolerance traits phenotyped under varying drought stress environments in peanut (Arachis hypogaea L.)
Euphytica, Vol.218(12), Art. 168
2022
Abstract
Genomic regions governing water deficit stress tolerance were identified in peanut using a recombinant inbred line (RIL) population derived from an elite variety TMV 2 and its narrow leaf mutant TMV 2-NLM, which was evaluated over six-seasons at Dharwad (non-stress) and Tirupati (water-stress) in India. Stress condition could differentiate the RILs much better than the non-stress condition for the physiological traits. A linkage map with 700 markers was used to identify the quantitative trait loci (QTLs). Three sets of best linear unbiased predictions (BLUPs) were estimated for the drought tolerance traits for the rainy and post-rainy seasons at Dharwad and post-rainy seasons at Tirupati, and employed for single marker analysis, composite interval mapping and multiple QTL mapping. Of the 305 significant marker-trait associations for the 11 traits, only 21 were of major effect for pod yield per plant (PYPP), specific dry weight at 70 days after sowing (SDW_70) and specific leaf area at 70 DAS (SLA_70). Three major main effect QTLs were identified for PYPP with the highest phenotypic variance explained (PVE) of 10.5%. Nine QTLs with the highest PVE of 18.4% were identified for SDW_70, of which four QTLs were also governing SLA_70 with the highest PVE of 15.7%. A few of them were also involved in epistatic interactions, and formed multiple QTL mapping models. Five major QTLs for SDW_70 were stable over both the locations. Candidate genes with SNPs and AhMITE1 insertion were identified for the major QTL regions. A rare nonsynonymous SNP at Ah02_1558700 within the gene ArahyW1P0U6 governing PYPP was detected. Functional analysis of these candidate genes may be useful for future genetic modifications in addition to validating and using the linked markers for improving drought tolerance in peanut.
Details
- Title
- Genetic mapping of drought tolerance traits phenotyped under varying drought stress environments in peanut (Arachis hypogaea L.)
- Authors/Creators
- S. Ghosh (Author/Creator) - University of Agricultural SciencesS.S. Mahadevaiah (Author/Creator)S.A. Gowda (Author/Creator)S.S. Gangurde (Author/Creator)M.P. Jadhav (Author/Creator)A.A. Hake (Author/Creator)P. Latha (Author/Creator)T. Anitha (Author/Creator)V.P. Chimmad (Author/Creator)K.K. Mirajkar (Author/Creator)V. Sharma (Author/Creator)M.K. Pandey (Author/Creator)K. Shirasawa (Author/Creator)S.N. Nayak (Author/Creator)R.K. Varshney (Author/Creator)R.S. Bhat (Author/Creator)
- Publication Details
- Euphytica, Vol.218(12), Art. 168
- Publisher
- Kluwer Academic Publishers
- Identifiers
- 991005541806407891
- Copyright
- © 2022 Springer Nature Switzerland AG.
- Murdoch Affiliation
- Centre for Crop and Food Innovation; State Agricultural Biotechnology Centre
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.96 QTL
- Web Of Science research areas
- Agronomy
- Horticulture
- Plant Sciences
- ESI research areas
- Plant & Animal Science