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

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

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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 per-formed a genome-wide association study(GWAS)and genomic prediction of resistance in testcross hybrids of 677 inbred lines from the Tuxpeño and non-Tuxpeño heterotic pools grown in three environ-ments 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 abi-otic 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.

Maize stalk rotGenome-wide association mappingHaplotype analysisGenomic predictionG × E interaction

Junqiao Song、Angela Pacheco、Amos Alakonya、Andrea S.Cruz-Morales、Carlos Mu?oz-Zavala、Jingtao Qu、Chunping Wang、Xuecai Zhang、Felix San Vicente、Thanda Dhliwayo

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College of Agronomy,Henan University of Science and Technology,Luoyang 471000,Henan,China

International Maize and Wheat Improvement Center(CIMMYT),El Batan,Mexico

Anyang Academy of Agricultural Sciences,Anyang 455000,Henan,China

CIMMYT-China Specialty Maize Research Center,Crop Breeding,and Cultivation Research Institute,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China

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CGIAR Research Program(CRP)on MAIZEUSAID through the Accelerating Genetic Gains Supple-mental ProjectOne CGIAR Initiative on Accelerated Breeding国家留学基金委项目

9 MTO 069033

2024

10.1016/j.cj.2024.02.004

作物学报(英文版)

作物学报(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.12(2)
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