Genome-wide association mapping and genomic prediction of stalk rot in two mid-altitude tropical maize populations

文献类型： 外文期刊

第一作者： Song, Junqiao

作者： Song, Junqiao;Wang, Chunping;Song, Junqiao;Pacheco, Angela;Alakonya, Amos;Cruz-Morales, Andrea S.;Munoz-Zavala, Carlos;Zhang, Xuecai;San Vicente, Felix;Dhliwayo, Thanda;Song, Junqiao;Qu, Jingtao

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关键词： Maize stalk rot; Genome-wide association mapping; Haplotype analysis; Genomic prediction; G x E interaction

期刊名称：CROP JOURNAL （ 影响因子：6.0； 五年影响因子：5.6 ）

ISSN： 2095-5421

年卷期： 2024 年 12 卷 2 期

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收录情况： SCI

摘要： Maize stalk rot reduces grain yield and quality. Information about the genetics of resistance to maize stalk rot could help breeders design effective breeding strategies for the trait. Genomic prediction may be a more effective breeding strategy for stalk-rot resistance than marker-assisted selection. We performed a genome-wide association study (GWAS) and genomic prediction of resistance in testcross hybrids of 677 inbred lines from the Tuxpe & ntilde;o and non-Tuxpe & ntilde;o heterotic pools grown in three environments and genotyped with 200,681 single-nucleotide polymorphisms (SNPs). Eighteen SNPs associated with stalk rot shared genomic regions with gene families previously associated with plant biotic and abiotic responses. More favorable SNP haplotypes traced to tropical than to temperate progenitors of the inbred lines. Incorporating genotype-by-environment (G x E) interaction increased genomic prediction accuracy. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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