数字农科院2.0

Genome-wide linkage mapping of Fusarium crown rot in common wheat (Triticum aestivum L.)

文献类型： 外文期刊

作者： Faji Li;Can Guo;Qi Zhao;Weie Wen;Shengnan Zhai;Xinyou Cao;Cheng Liu;Dungong Cheng;Jun Guo;Yan Zi;Aifeng Liu;Jianmin Song;Jianjun Liu;Jindong Liu;Haosheng Li

作者机构：

关键词： common wheat;Fusarium crown rot (FCR);kompetitive allele-specific PCR (KASP);molecular marker-assisted selection;quantitative trait Loci (QTL)

期刊名称： Frontiers in Plant Science

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCIE（2024版）

摘要： Introduction: Powdery mildew (PM) poses an extreme threat to wheat yields and quality.[Methods] In this study, 262 recombinant inbred lines (RILs) of Doumai and Shi 4185 cross were used to map PM resistance genes across four environments. A high-density genetic linkage map of the Doumai/Shi 4185 RIL population was constructed using the wheat Illumina iSelect 90K single-nucleotide polymorphism (SNP) array. Results: In total, four stable quantitative trait loci (QTLs) for PM resistance, QPm.caas-2AS,QPm.caas-4AS, QPm.caas-4BL, and QPm.caas-6BS, were detected and explained 5.6%–15.6% of the phenotypic variances. Doumai contributed all the resistance alleles of QPm.caas-2AS, QPm.caas-4AS, QPm.ca as-4BL, and QPm.caas-6BS. Among these, QPm.caas-4AS and QPm.caas-6BS overlapped with the previously reported loci, whereas QPm.caas-2AS and QPm.caas-4BL are potentially novel. Additionally, six high-confidence genes encoding the NBS-LRR-like resistance protein, disease resistance protein family, and calcium/calmodulin-dependent serine/threonine-kinase were selected as the candidate genes for PM resistance. Three kompetitive allele-specific PCR (KASP) markers, Kasp_PMR_2AS for QPm.caas-2AS, Kasp_PMR_4BL for QPm.caas-4BL, and Kasp_PMR_6BS for QPm.caas-6BS, were developed, and their genetic effects were validated in a natural population including 100 cultivars. Discussion: These findings will offer valuable QTLs and available KASP markers to enhance wheat marker-assisted breeding for PM resistance.

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