华北农学报 ›› 2025, Vol. 40 ›› Issue (4): 175-184. doi: 10.7668/hbnxb.20195775

所属专题: 小麦 植物保护 生物技术

• 资源环境·植物保护 • 上一篇    下一篇

基于高通量芯片的小麦抗赤霉病基因高效KASP标记开发和育种应用

邓清燕, 罗江陶, 郑建敏, 蒲宗君   

  1. 四川省农业科学院 作物研究所(四川省种质资源中心),农业农村部西南地区小麦生物学与遗传育种重点实验室,粮油作物绿色种质创新与遗传改良四川省重点实验室,四川 成都 610066
  • 收稿日期:2025-02-10 出版日期:2025-09-01
  • 通讯作者:
    蒲宗君(1970-),男,四川南部人,研究员,博士,主要从事小麦遗传育种研究。
  • 作者简介:

    邓清燕(1990-),女,重庆永川人,助理研究员,博士,主要从事小麦遗传育种研究。

  • 基金资助:
    四川省财政专项(2021ZYGG-003); 四川省科技计划项目(2022JDRC0113); 四川省“十四五”麦类育种攻关项目(2021YFYZ0002); 四川创新团队(SCCXTD-2024-11)

Development and Application of High Efficiency KASP Markers of Wheat Fusarium Head Blight Resistance Genes Based on High Throughput Chip

DENG Qingyan, LUO Jiangtao, ZHENG Jianmin, PU Zongjun   

  1. Crop Research Institute,Sichuan Academy of Agricultural Sciences,Key Laboratory of Wheat Biology and Genetic Improvement in Southwestern China,Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province,Chengdu 610066,China
  • Received:2025-02-10 Published:2025-09-01

摘要:

小麦赤霉病是严重威胁小麦安全生产的真菌性病害,利用分子标记辅助选择聚合抗病基因已成为当前抗赤霉病育种的快速有效策略。为建立小麦抗赤霉病基因的高通量筛选体系、创制抗赤霉病新种质并提升四川小麦赤霉病抗性,利用100K SNP芯片对14个四川小麦品种(系)和3个抗赤霉病种质进行全基因组基因型分析。基于已报道的主效抗赤霉病基因Fhb2Fhb4Fhb5的遗传连锁区间,筛选获得与目标基因连锁(Fhb2Fhb4)或共分离(Fhb5)的SNP位点,并据此开发特异性KASP标记。结果显示,基于100K SNP芯片,17份小麦品种(系)按遗传相似性可以划分为两大类:含有北方小麦遗传背景的抗病种质NMAS070和NMAS069独立成簇,与四川小麦品种(系)间亲缘关系较远;其余15份品种(系)聚为一类并进一步分为2个亚类。功能基因检测揭示抗病亲本携带赤霉病抗性位点,而农艺亲本则富集产量与品质相关优异等位变异。通过SNP位点筛选,在Fhb2Fhb4连锁区间及Fhb5共分离区间内共鉴定出8个关键SNP位点,据此成功开发4对Fhb2、2对Fhb4和2对Fhb5的特异性KASP标记。验证试验表明,所有KASP标记均能实现精准分型,并已有效应用于赤霉病抗病分子育种实践。开发的小麦抗赤霉病基因Fhb2Fhb4Fhb5高效KASP标记体系为小麦赤霉病抗性改良提供了重要技术支撑,对提升西南麦区小麦品种赤霉病抗性具有重要应用价值。

关键词: 小麦, 小麦赤霉病, KASP标记, 分子标记选择, 抗赤霉病育种

Abstract:

Fusarium head blight(FHB)is a devastating fungal disease that seriously threatens the safety of wheat production.Marker-assisted selection(MAS)and pyramiding of resistance genes represent efficient strategies for FHB-resistant breeding.To establish a high-throughput screening system for FHB resistance genes and enhance wheat resistance in Sichuan Province,we performed genome-wide genotyping using a 100K SNP array on 14 Sichuan wheat varieties(lines)along with three FHB-resistant genetic materials.Based on the reported genetic linkage intervals of major FHB resistance genes(Fhb2,Fhb4,Fhb5),we identified SNPs co-segregating with Fhb5 or linked to Fhb2,Fhb4,and subsequently developed kompetitive allele-specific PCR(KASP)markers.Results showed that the genetic relationship of 17 wheat varieties(lines)could be clustered into two major groups:two northern wheat-derived resistant materials(NMAS070 and NMAS069)formed an independent cluster distinct from the Sichuan varieties(lines)while the remaining 15 varieties(lines)were clustered together and subdivided into two subgroups.Functional gene profiling revealed FHB-resistant parents carried superior resistance loci,whereas agronomic parents harbored favorable alleles for yield and quality traits.Through SNP screening,we identified 8 critical SNPs within the linkage intervals of Fhb2,Fhb4 and the co-segregation region of Fhb5.These SNPs enabled the successful development of 4,2,and 2 high-specificity KASP marker systems for Fhb2,Fhb4 and Fhb5,respectively.Validation experiments confirmed all KASP markers achieved precise genotyping and were effectively implemented in molecular breeding for FHB-resistance.This study established a high-efficiency KASP marker system for Fhb2,Fhb4 and Fhb5,providing a robust technical platform for improving FHB resistance breeding of wheat varieties in Southwest China.

Key words: Wheat, Fusarium head blight(FHB), KASP marker, Marker selection, FHB-resistance breeding

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引用本文

邓清燕, 罗江陶, 郑建敏, 蒲宗君. 基于高通量芯片的小麦抗赤霉病基因高效KASP标记开发和育种应用[J]. 华北农学报, 2025, 40(4): 175-184. doi: 10.7668/hbnxb.20195775.

DENG Qingyan, LUO Jiangtao, ZHENG Jianmin, PU Zongjun. Development and Application of High Efficiency KASP Markers of Wheat Fusarium Head Blight Resistance Genes Based on High Throughput Chip[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(4): 175-184. doi: 10.7668/hbnxb.20195775.