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作物学报 ›› 2009, Vol. 35 ›› Issue (8): 1458-1461.doi: 10.3724/SP.J.1006.2009.01458

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

EST辅助的甘蓝型油菜显性核不育AFLP标记转化

宋来强1,2,易斌2,杨明贵2,陈伦林1,傅廷栋2   

  1. 1江西省农业科学院油料作物重点实验室，江西南昌330200；2华中农业大学植物遗传改良国家重点实验室，高家油菜品种改良武汉分中心，湖北武汉430070
  • 收稿日期:2008-12-17 修回日期:2009-03-08 出版日期:2009-08-12 网络出版日期:2009-05-19
  • 作者简介:songlaiqiang@yahoo.com.cn
  • 基金资助:

    本研究由国家重点基础研究发展计划（973计划）项目（2001CB10807），引进国际先进农业科学技术计划（948计划）项目（2006-G04），高家油菜现代产业技术体系（nycytx-00512）项目资助。

EST-Aided Conversion of AFLP Marker Linked to Dominant Male Sterility Gene in Brassica napus into SCAR

SONG Lai-Qiang1,2,YI Bin2,YANG Ming-Gui2,CHEN Lun-Lin1,FU Ting-Dong2   

  1. 1Key Laboratory of Oil Crops，jiangxi Academy of Agricultural Sciences,Nanchang 330200,China;2National Key Laboratory of Crop Genetic Improvement,National Subcenter of Rapeseed Improvement in Wuhan,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2008-12-17 Revised:2009-03-08 Published:2009-08-12 Published online:2009-05-19
  • About author:songlaiqiang@yahoo.com.cn

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1411

被引次数

13

摘要：

甘蓝型油菜显性核不育广泛应用于轮回选择和杂种优势利用，不育基因标记的开发与应用对于基因克隆和育种实践具有重要意义。基于AFLP标记SA12MG14的序列信息，从拟南芥整合数据库中，检索与标记序列同源的甘蓝型油菜EST，结合标记和EST序列设计特异引物，转化成新的SCAR标记。获得的SCAR标记S6B3，具有很高的检测稳定性，在回交群体Popu2上分析验证，结果与AFLP标记完全一致。该标记与不育基因相距0.3 cM，将其用于临保系同源的纯合型不育系选育，可有效提高育种工作效率。

关键词: 甘蓝型油菜, 显性核不育, EST, AFLP, SCAR

Abstract:

Dominant genic male sterility (Ms) in Brassica napus has been widely utilized in recurrent selection and in heterosis application. Recent genetical studies verified that its restorer gene is an allele locating at the Ms gene locus. According to this genetic pattern, a whole sterile population (Msms) can be acquired by crossing a homozygous male sterile line (MsMs) with a temporary maintainer (msms) and further used as a female parent in hybrid production, but trans-breeding of the sterile line or the temporary maintainer line that has the same nuclear background with the temporary maintainer line or the sterile line is critical to obtain uniform hybrid population and to maintain heterosis. Because of being laborious and time-consuming, an AFLP marker is usually converted to a PCR marker which is more efficient in molecular marker-assisted selection. In present study, we developed a SCAR marker with bioinformatics method from an AFLP marker SA12MG14 tightly linked to the Ms. Homologous sequences for this marker were obtained through Blast search (http://www.ncbi.nlm.nih.gov), and a corresponding accession of EST from Brassica napus was found from the Arabidopsis thaliana Integrated Database (http://atidb.org/cgi-perl/gbrowse/atibrowse). According to the combined sequence information of the AFLP fragment and the EST, a pair of primers was designed and analyzed on a backcross population Popu2. A dominant SCAR marker S6B3 was successfully identified and further detected consistently on the population with the original AFLP marker. The detected band was clear and steady. This marker is 0.3 cM away from the Ms, and its practical application will enhance work efficiency of breeding for homozygous sterile lines homologous to corresponding temporary maintainers.

Key words: Brassica napus, Dominant genic male sterility, EST, AFLP, SCAR

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