生物技术进展 ›› 2021, Vol. 11 ›› Issue (5): 581-589.DOI: 10.19586/j.2095-2341.2021.0119

• 赤霉病抗源及种质创新 • 上一篇    下一篇

小麦赤霉病新抗源的发掘与抗性位点的检测分析

翟文玲(), 刘彩云(), 刘颖, 付必胜, 蔡瑾, 郭炜, 张巧凤, 吴纪中()   

  1. 江苏省农业科学院种质资源与生物技术研究所,江苏省农业生物学重点实验室,南京 210014
  • 收稿日期:2021-06-16 接受日期:2021-07-27 出版日期:2021-09-25 发布日期:2021-10-08
  • 通讯作者: 吴纪中
  • 作者简介:翟文玲与刘彩云为本文共同第一作者。翟文玲 E-mail:2570254322@qq.com
    刘彩云 E-mail:caiyunliuwheat@gmail.com
  • 基金资助:
    国家重点研发计划项目(2016YFD0100102);江苏省农业科技自主创新资金项目〔CX(18)1001〕;江苏省农业重大新品种创制项目(PZCZ201708)

Phenotypic and Molecular Identification of New Wheat Germplasm Resistant to Fusarium Head Blight

Wenling ZHAI(), Caiyun LIU(), Ying LIU, Bisheng FU, Jin CAI, Wei GUO, Qiaofeng ZHANG, Jizhong WU()   

  1. Jiangsu Provincial Key Laboratory of Agrobiology,Institute of Germplasm Resources and Biotechnology,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China
  • Received:2021-06-16 Accepted:2021-07-27 Online:2021-09-25 Published:2021-10-08
  • Contact: Jizhong WU

摘要:

小麦赤霉病是由禾谷镰刀菌引起的世界性重要病害,发掘优异的抗性种质资源、培育抗病品种是持续防治赤霉病最经济且环境友好的措施。为发掘新的赤霉病抗源,本研究于2017—2021年在弥雾保湿大棚中,采用单花滴注法对642份小麦种质资源的赤霉病抗扩展性进行鉴定,同时利用已知抗赤霉病基因/位点Fhb1~Fhb7的分子标记对筛选出的抗性种质基因型进行分析。结果表明,不同年份间赤霉病病小穗率的相关性均达到极显著水平。筛选到3年及以上赤霉病抗性优于扬麦158的种质81份,主要来自长江中下游麦区,其中33份种质连续4年抗性优于扬麦158;筛选到3年及以上抗性与苏麦3号相当的种质9份,分别为望水白、Grandin、浩麦1号、剑子麦、魁小麦、农林26、软秆洋麦、苏麦2号和武农6号,其中剑子麦、软秆洋麦、苏麦2号和Grandin连续4年抗性与苏麦3号相当。对抗性种质携带的抗赤霉病基因/位点进行分析发现,浩麦1号、冀师7225-28、南农13Y110、石优17和武农6号不携带任何已知抗赤霉病基因/QTL,为小麦抗赤霉病研究和品种培育提供了新的种质资源和理论依据。

关键词: 小麦, 赤霉病, 种质资源, 抗性鉴定

Abstract:

Fusarium head blight (FHB) caused by Fusarium graminearum is a major threat to wheat production and food security worldwide. The identification of resistant germplasm and breeding cultivars of high resistant FHB are cost?effective and environment?friendly approachs for controlling FHB. In order to explore the new resistant germplasm, 642 wheat lines were evaluated with single floret inoculation method to identify their type Ⅱ resistance to FHB in the greenhouse from 2017 to 2021, and molecular markers linked to known FHB resistance genes of wheat were used for genotyping. The results showed that the percentage of symptomatic spikelets per spike of wheat lines were significant correlations among four years. A total of 81 lines, mainly from the Middle and Lower Valleys of the Yangtze River, showed better resistance to FHB than Yangmai 158 in at least three years, of which 33 lines were more resistant than Yangmai 158 in four years. Nine lines including Wangshuibai, Grandin, Haomai 1, Jianzimai, Kuixiaomai, Norin 26, Ruanganyangmai, Sumai 2, and Wunong 6 showed comparable resistance with Sumai 3 in at least three years, of which Jianzimai, Ruanganyangmai, Sumai 2 and Grandin showed high resistance in four years. Genotyping showed that Haomai 1, Jishi 7225?28, NAU13Y110, Shiyou 17, and Wunong 6 carried none of the known gene/QTL to FHB, which provided theoretical basis and germplasm resources for breeding wheat new varieties of resistance to Fusarium head blight.

Key words: wheat, Fusarium head blight, germplasm resources, resistance identification

中图分类号: