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园艺学报 ›› 2010, Vol. 37 ›› Issue (8): 1264-1272.

• 蔬菜 • 上一篇    下一篇

大白菜抗根肿病近等基因系的分子标记辅助选育

朴钟云*,吴 迪,王 淼,张 腾   

  1. (沈阳农业大学园艺学院,沈阳 110866)
  • 收稿日期:2010-05-12 修回日期:2010-06-30 出版日期:2010-08-25 发布日期:2010-08-25
  • 通讯作者: 朴钟云

Marker-assisted Selection of Near Isogenic Lines for Clubroot Resistant Gene in Chinese Cabbage

PIAO Zhong-yun*,WU Di,WANG Miao,and ZHANG Teng   

  1. (College of Horticulture,Shenyang Agricultural University,Shenyang 110866,China)
  • Received:2010-05-12 Revised:2010-06-30 Online:2010-08-25 Published:2010-08-25
  • Contact: PIAO Zhong-yun

摘要: 以具有抗根肿病基因CRb的大白菜‘CR Shinkii DH’系为抗源,通过分子标记辅助选择选育出大白菜优良自交系‘BJN3’的9份抗根肿病近等基因系。通过CRb基因侧翼标记TCR01和TCR09的前景选择,以及51个SSR标记的基因组背景选择,筛选出‘BJN3’基因组含量为98%的10株纯合抗性BC3F2个体。苗期的根肿病接菌试验证明这些BC3F2植株均表现出抗性。从10株纯合抗性BC3F2个体自交后代中,筛选出全部恢复‘BJN3’基因组的9株近等基因系。这些近等基因系的结球相关性状与‘BJN3’无显著差异。

关键词: 大白菜, 根肿病, CRb基因, 分子标记辅助选择, 近等基因系

Abstract: Clubroot disease is one of the most serious diseases in Chinese cabbage. In this study,nine near isogenic lines(NILs)were developed from backcross of clubroot susceptible‘BJN3’× clubroot resistant‘CR Shinkii DH’line through marker-assisted selection(MAS). Based on the foreground selection with TCR01 and TCR09 flanking the CRb gene and genomic background selection with 51 SSRs,10 homozygous resistant BC3F2 individuals recovering 98% of‘BJN3’genome were obtained. Results from inoculation of these BC3F2 individuals indicated that they were resistance to clubroot disease. By further selfing of BC3F2 individuals,nine BC3F3 individuals with full genome content of‘BJN3’were developed. Evaluation of heading related traits showed that there were no significant difference between the NILs and‘BJN3’.

Key words: Chinese cabbage, clubroot disease, CRb gene, marker-assisted selection, near isogenic line

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