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

作　　者：Junqiao Song Angela Pacheco Amos Alakonya Andrea S.Cruz-Morales Carlos Muoz-Zavala Jingtao Qu Chunping Wang Xuecai Zhang Felix San Vicente Thanda Dhliwayo 

机构地区：[1]College of Agronomy,Henan University of Science and Technology,Luoyang 471000,Henan,China [2]International Maize and Wheat Improvement Center(CIMMYT),El Batan,Mexico [3]Anyang Academy of Agricultural Sciences,Anyang 455000,Henan,China [4]CIMMYT-China Specialty Maize Research Center,Crop Breeding,and Cultivation Research Institute,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China

出　　处：《The Crop Journal》2024年第2期558-568,共11页作物学报（英文版）

基　　金：funded by the CGIAR Research Program(CRP)on MAIZE;the USAID through the Accelerating Genetic Gains Supplemental Project(Amend.No.9 MTO 069033),and the One CGIAR Initiative on Accelerated Breeding;funding from the governments of Australia,Belgium,Canada,China,France,India,Japan,the Republic of Korea,Mexico,the Netherlands,New Zealand,Norway,Sweden,Switzerland,the United Kingdom,the United States,and the World Bank;supported by the China Scholarship Council。

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?o and non-Tuxpe?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×E)interaction increased genomic prediction accuracy.

关 键 词：Maize stalk rot Genome-wide association mapping Haplotype analysis Genomic prediction G×E interaction 

分 类 号：S435.131[农业科学—农业昆虫与害虫防治]