Genome-wide association analysis of type II resistance to Fusarium head blight in common wheat.
| Autor: | Wang D; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China., Zhao Y; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China., Zhao X; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China., Ji M; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China., Guo X; Taiyuan Agro-Tech Extension and Service Center, Taiyuan, Shanxi, China., Tian J; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China.; Shandong Huatian Agricultural Technology Co., Ltd, Tai'an, Shandong, China., Chen G; College of Ecology and Garden Architecture, Dezhou University, Dezhou, Shandong, China., Deng Z; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong, China. |
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| Jazyk: | angličtina |
| Zdroj: | PeerJ [PeerJ] 2023 Sep 21; Vol. 11, pp. e15906. Date of Electronic Publication: 2023 Sep 21 (Print Publication: 2023). |
| DOI: | 10.7717/peerj.15906 |
| Abstrakt: | Background: Fusarium head blight (FHB) is a disease affecting wheat spikes caused by some Fusarium species and leads to cases of severe yield reduction and seed contamination. Identifying resistance genes/QTLs from wheat germplasm may help to improve FHB resistance in wheat production. Methods: Our study evaluated 205 elite winter wheat cultivars for FHB resistance. A high-density 90K SNP array was used for genotyping the panel. A genome-wide association study (GWAS) from cultivars from three different environments was performed using a mixed linear model (MLM). Results: Sixty-six significant marker-trait associations (MTAs) were identified ( P < 0.001) on fifteen chromosomes that explained the phenotypic variation ranging from 5.4 to 11.2%. Some important new MTAs in genomic regions involving FHB resistance were found on chromosomes 2A, 3B, 5B, 6A, and 7B. Six MTAs at 92 cM on chromosome 7B were found in cultivars from two different environments. Moreover, there were 11 MTAs consistently associated with diseased spikelet rate and diseased rachis rate as pleiotropic effect loci and D_contig74317_533 on chromosome 5D was novel for FHB resistance. Eight new candidate genes of FHB resistance were predicated in wheat in this study. Three candidate genes, TraesCS5D02G006700 , TraesCS6A02G013600 , and TraesCS7B02G370700 on chromosome 5DS, 6AS, and 7BL, respectively, were perhaps important in defending against FHB by regulating intramolecular transferase activity, GTP binding, or chitinase activity in wheat, but further validation in needed. In addition, a total of five favorable alleles associated with wheat FHB resistance were discovered. These results provide important genes/loci for enhancing FHB resistance in wheat breeding by marker-assisted selection. Competing Interests: Jichun Tian is employed by Shandong Huatian Agricultural Technology Co., Ltd. The authors have no competing interests. (©2023 Wang et al.) |
| Databáze: | MEDLINE |
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