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Genome-Wide Mapping of Quantitative Trait Loci for Yield-Attributing Traits of Peanut

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Relation http://oar.icrisat.org/12720/
https://doi.org/10.3390/genes15020140
 
Title Genome-Wide Mapping of Quantitative Trait Loci for Yield-Attributing Traits of Peanut
 
Creator Joshi, Pushpesh
Soni, P
Sharma, V
Manohar, S S
Kumar, Sampath
Sharma, Shailendra
Pasupuleti, J
Vadez, V
Varshney, R K
Pandey, M K
Puppala, N
 
Subject Crop Yield
Groundnut
Genetics and Genomics
 
Description Peanuts (Arachis hypogaea L.) are important high-protein and oil-containing legume crops adapted to arid to semi-arid regions. The yield and quality of peanuts are complex quantitative traits that show high environmental influence. In this study, a recombinant inbred line population (RIL) (Valencia-C × JUG-03) was developed and phenotyped for nine traits under two environments. A genetic map was constructed using 1323 SNP markers spanning a map distance of 2003.13 cM. Quantitative trait loci (QTL) analysis using this genetic map and phenotyping data identified seventeen QTLs for nine traits. Intriguingly, a total of four QTLs, two each for 100-seed weight (HSW) and shelling percentage (SP), showed major and consistent effects, explaining 10.98% to 14.65% phenotypic variation. The major QTLs for HSW and SP harbored genes associated with seed and pod development such as the seed maturation protein-encoding gene, serine-threonine phosphatase gene, TIR-NBS-LRR gene, protein kinase superfamily gene, bHLH transcription factor-encoding gene, isopentyl transferase gene, ethylene-responsive transcription factor-encoding gene and cytochrome P450 superfamily gene. Additionally, the identification of 76 major epistatic QTLs, with PVE ranging from 11.63% to 72.61%, highlighted their significant role in determining the yield- and quality-related traits. The significant G × E interaction revealed the existence of the major role of the environment in determining the phenotype of yield-attributing traits. Notably, the seed maturation protein-coding gene in the vicinity of major QTLs for HSW can be further investigated to develop a diagnostic marker for HSW in peanut breeding. This study provides understanding of the genetic factor governing peanut traits and valuable insights for future breeding efforts aimed at improving yield and quality.
 
Publisher MDPI
 
Date 2024-01-23
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12720/1/genes_15_1-21_2024.pdf
Joshi, Pushpesh and Soni, P and Sharma, V and Manohar, S S and Kumar, Sampath and Sharma, Shailendra and Pasupuleti, J and Vadez, V and Varshney, R K and Pandey, M K and Puppala, N (2024) Genome-Wide Mapping of Quantitative Trait Loci for Yield-Attributing Traits of Peanut. Genes (TSI), 15. pp. 1-21. ISSN 2073-4425