华北农学报 ›› 2007, Vol. 22 ›› Issue (4): 189-192. doi: 10.7668/hbnxb.2007.04.044

所属专题: 小麦 生物技术

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小麦抗条锈基因Yr6分子标记初步研究

李勇1, 牛永春1,2   

  1. 1. 中国农业科学院植物保护研究所, 北京 100094;
    2. 中国农业科学院农业资源与农业区划研究所, 北京 100081
  • 收稿日期:2007-04-03 出版日期:2007-08-28
  • 通讯作者: 牛永春(1957-),男,河南人,研究员,博士,博士生导师,主要从事植物病理和真菌学研究工作。
  • 作者简介:李勇(1976-),男,河北衡水人,博士,主要植物抗病遗传研究。
  • 基金资助:
    国家重点基础研究发展规划项目(2006CB100203)

Identification of Molecular Markers for Wheat Stripe Rust Resistance Gene Yr6

LI Yong1, NIU Yong-chun1,2   

  1. 1. Institute of Plant Protection, Chinese Academy of Agriculture Sciences, Beijing 100094, China;
    2. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agriculture Sciences, Beijing 100081, China
  • Received:2007-04-03 Published:2007-08-28

摘要: 小麦抗条锈基因Yr6在我国小麦育种中应用很少,寻找该基因的分子标记将有助于促进该基因的合理利用。将Yr6与其他有效的抗条锈基因相结合可以拓宽品种的抗病谱,延长育成品种的使用年限。本研究中,共用653条RAPD引物和小麦7B染色体上的36对SSR引物对Yr6的近等基因系进行了DNA多态性分析,对PCR产物具有多态性的SSR引物进一步检测了Yr6基因的2个载体品种。结果共有93条RAPD引物(占总数的1.2%)和5对SSR引物(占总数的13.9%)在抗病近等基因系Yr6/6×Avocet S和感病材料Avocet S间稳定扩增出了差异条带,其中SSR标记Xwmc76和Xwmc276在Yr6基因的载体品种Heines Kolben和Heines Peko中检测出了与Yr6/6×Avocet S中相同、而与感病亲本Avocet S中不同的多态性扩增条带,说明这2个SSR标记可能与Yr6基因连锁。

关键词: 小麦, 条锈病, 抗性, SSR标记, RAPD标记

Abstract: Wheat stripe rust resistance gene Yr6 has been used very limited in wheat breeding in China, identification of molecular markers for Yr6 gene will promote reasonable use of the gene. Combining Yr6 gene with other effective stripe rust resistance genes will enhance stripe rust resistance and prolong commercial life of the cultivars bred. In this study, DNA polymorphism between the near iso-genic lines Yr6/6×Avocet S and susceptible line Avocet S was analyzed with 653 RAPD primers and 36 pair of SSR primers. The SSR primers with polymorphic PCR fragments were tested further on 2 Yr6-carring cultivars Heines Kolben and Heines Peko. The results showed that 93 (14.2% of total) RAPD primers and 5 (13.9% of total) pair of SSR primers amplified polymorphic DNA fragments between Yr6/6×Avocet S and Avocet S. The primers of SSR markers Xwmc76 and Xwmc276 amplified the same bands in the 2 Yr6-carring cultivars as in Yr6/6×Avocet S but different in susceptible line Avocet S, which implied the 2 SSR markers maybe linked to Yr6 gene.

Key words: Wheat, Stripe rust, Resistance, SSR marker, RAPD marker

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引用本文

李勇, 牛永春. 小麦抗条锈基因Yr6分子标记初步研究[J]. 华北农学报, 2007, 22(4): 189-192. doi: 10.7668/hbnxb.2007.04.044.

LI Yong, NIU Yong-chun. Identification of Molecular Markers for Wheat Stripe Rust Resistance Gene Yr6[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(4): 189-192. doi: 10.7668/hbnxb.2007.04.044.

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