Identification of main effect and epistatic quantitative trait loci for morphological and yield-related traits in peanut (Arachis hypogaea L.)

被引:0
作者
Yogendra Khedikar
Manish K. Pandey
V. Sujay
Sube Singh
Spurthi N. Nayak
Henry W. Klein-Gebbinck
Cholin Sarvamangala
Ganapati Mukri
Vanika Garg
Hari D. Upadhyaya
H. L. Nadaf
M. V. C. Gowda
Rajeev K. Varshney
Ramesh S. Bhat
机构
[1] University of Agricultural Sciences,Department of Genetics and Plant Breeding
[2] International Crops Research Institute for the Semi-Arid Tropics (ICRISAT),Department of Biotechnology
[3] University of Agricultural Sciences,undefined
[4] Agriculture and Agri-Food Canada,undefined
来源
Molecular Breeding | 2018年 / 38卷
关键词
Peanut; QTL analysis; Epistatic interaction; Agro-morphological traits; Yield;
D O I
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中图分类号
学科分类号
摘要
An effort was made in the present study to identify the main effect and epistatic quantitative trait locus (QTL) for the morphological and yield-related traits in peanut. A recombinant inbred line (RIL) population derived from TAG 24 × GPBD 4 was phenotyped in seven environments at two locations. QTL analysis with available genetic map identified 62 main-effect QTLs (M-QTLs) for ten morphological and yield-related traits with the phenotypic variance explained (PVE) of 3.84–15.06%. Six major QTLs (PVE > 10%) were detected for PLHT, PPP, YPP, and SLNG. Stable M-QTLs appearing in at least two environments were detected for PLHT, LLN, YPP, YKGH, and HSW. Five M-QTLs governed two traits each, and 16 genomic regions showed co-localization of two to four M-QTLs. Intriguingly, a major QTL reported to be linked to rust resistance showed pleiotropic effect for yield-attributing traits like YPP (15.06%, PVE) and SLNG (13.40%, PVE). Of the 24 epistatic interactions identified across the traits, five interactions involved six M-QTLs. Three interactions were additive × additive and remaining two involved QTL × environment (QE) interactions. Only one major M-QTL governing PLHT showed epistatic interaction. Overall, this study identified the major M-QTLs for the important productivity traits and also described the lack of epistatic interactions for majority of them so that they can be conveniently employed in peanut breeding.
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