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Dissection of the Genetic Basis of Resistance to Stem Rot in Cultivated Peanuts (Arachis hypogaea L.) through Genome-Wide Association Study

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Relation http://oar.icrisat.org/12273/
https://www.mdpi.com/2073-4425/14/7/1447
https://doi.org/10.3390/genes14071447
 
Title Dissection of the Genetic Basis of Resistance to Stem Rot in Cultivated Peanuts (Arachis hypogaea L.) through Genome-Wide Association Study
 
Creator Yan, L
Song, W
Wang, Z
Yu, D
Sudini, H K
Kang, Y
Lei, Y
Huai, D
Chen, Y
Wang, X
Wang, Q
Liao, B
 
Subject Integrated Crop Management (ICM)
Groundnut
Plant Pathology
 
Description Peanut (Arachis hypogaea) is an important oilseed and cash crop worldwide, contributing an important source of edible oil and protein for human nutrition. However, the incidence of stem rot disease caused by Athelia rolfsii poses a major challenge to peanut cultivation, resulting in significant yield losses. In this study, a panel of 202 peanut accessions was evaluated for their resistance to stem rot by inoculating plants in the field with A. rolfsii-infested oat grains in three environments. The mean disease index value of each environment for accessions in subsp. fasitigiate and subsp. hypogaea showed no significant difference. Accessions from southern China displayed the lowest disease index value compared to those from other ecological regions. We used whole-genome resequencing to analyze the genotypes of the accessions and to identify significant SNPs associated with stem rot resistance through genome-wide association study (GWAS). A total of 121 significant SNPs associated with stem rot resistance in peanut were identified, with phenotypic variation explained (PVE) ranging from 12.23% to 15.51%. A total of 27 candidate genes within 100 kb upstream and downstream of 23 significant SNPs were annotated, which have functions related to recognition, signal transduction, and defense response. These significant SNPs and candidate genes provide valuable information for further validation and molecular breeding to improve stem rot resistance in peanut.
 
Publisher MDPI
 
Date 2023-07-14
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12273/1/Genes_14_1-13_2023.pdf
Yan, L and Song, W and Wang, Z and Yu, D and Sudini, H K and Kang, Y and Lei, Y and Huai, D and Chen, Y and Wang, X and Wang, Q and Liao, B (2023) Dissection of the Genetic Basis of Resistance to Stem Rot in Cultivated Peanuts (Arachis hypogaea L.) through Genome-Wide Association Study. Genes (TSI), 14. pp. 1-13. ISSN 2073-4425