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园艺学报 ›› 2008, Vol. 35 ›› Issue (6): 885-890.

• 研究简报 • 上一篇    下一篇

马铃薯抗晚疫病主效基因R10的RGA-CAPS标记的开发

王加加1,2;徐建飞2;李 颖2;王凤义1;黄三文2*   

  1. 1东北农业大学农学院,哈尔滨 150030; 2中国农业科学院蔬菜花卉研究所,北京 100081)
  • 收稿日期:2008-02-27 修回日期:2008-04-24 出版日期:2008-06-25 发布日期:2008-06-25
  • 通讯作者: 黄三文

Developing of RGA-CAPS markers for resistant gene R10 to potato late blight

WANG Jia-jia1,2, XU Jian-fei2,LIYing2,WANG Feng-yi1, HUANG San-wen2*   

  1. 1College of Agriculture, Northeast Agriculture University, Harbin 150030, China; 2Institute of Vegetable and Flowers, Chinese Academy of Agriculture Sciences, Beijing 100081, China)
  • Received:2008-02-27 Revised:2008-04-24 Online:2008-06-25 Published:2008-06-25
  • Contact: HUANG San-wen

摘要: 马铃薯晚疫病抗性基因R10,属于马铃薯抗晚疫病主效位点MLB单倍型之一,该位点已知的各单倍型基因均具有保守结构域,属于同一个R3a基因家族。将R3a基因和源于MLB位点的R3a基因的同源序列进行比对,根据它们高度保守的区域设计引物,以马铃薯晚疫病鉴别寄主MaR10(含抗晚疫病基因R10)、四倍体马铃薯栽培种Katahdin(不含已知抗病基因)及其杂交一代为试材,得到R3a的抗病基因同源序列,再结合限制性内切酶筛选,开发出与马铃薯抗晚疫病主效基因R10连锁的两个RGA-CAPS标记: RGA-600和RGA-1000,这两个标记距离R10基因0.25cM。

关键词: 马铃薯, 晚疫病, R10基因, RGA-CAPS标记

Abstract: R10 gene conferring resistance to potato (Solanum tuberosum L.) late blight is one of haplotypes in major late blight resistance complex (MLB). Based on sequence analysis for resistant genes known in this complex, it's indicated that these haplotypes have conserved domains and belong to R3a gene family. So twelve primer combinations were designed based on the conserved sequences of R3a gene and its homologs derived from MLB and were used to identify resistance gene analogs (RGA) closely linked to the R10 gene. The conserved primers combinations were screened by a population of the R10 differential (MaR10) and the susceptible potato (Solanum tuberosum) cultivar Katahdin. The PCR products then were digested with twelve restriction enzymes and were assessed for polymorphism by bulk segregant analysis. The RGA-CAPS marker RGA-600 and RGA-1000 linked 0.25 cM to the R10 gene, were developed and made base for the cloning of R10 gene.

Key words: potato, late blight, R3a gene, R10 gene, RGA-CAPS marker

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