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
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Abstract
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.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : Asia |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | peanut, stem rot, resistance, genome-wide association study (GWAS), significant SNP |
| Subjects: | Others > Integrated Crop Management (ICM) Mandate crops > Groundnut Others > Plant Pathology |
| Depositing User: | Mr Nagaraju T |
| Date Deposited: | 07 Nov 2023 09:04 |
| Last Modified: | 07 Nov 2023 09:04 |
| URI: | http://oar.icrisat.org/id/eprint/12273 |
| Official URL: | https://www.mdpi.com/2073-4425/14/7/1447 |
| Projects: | UNSPECIFIED |
| Funders: | National Natural Science Foundation of China, Central Public-interest Scientific Institution Basal Research Fund, Key Area Research and Development Program of Hubei Province |
| Acknowledgement: | The authors thank Chaobo Tong and Taihua Yang for data analysis. |
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