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水稻抗白叶枯病基因Xa4位点跨叠BAC克隆群的构建
引用本文:江光怀,王文明,谢兵,翟文学,鲁润龙,朱立煌.水稻抗白叶枯病基因Xa4位点跨叠BAC克隆群的构建[J].遗传学报,2001,28(3):236-243.
作者姓名:江光怀  王文明  谢兵  翟文学  鲁润龙  朱立煌
作者单位:1. 中国科学院遗传研究所, 北京 100101;中国科学技术大学生命科学学院, 安徽合肥 230026
2. 中国科学院遗传研究所, 北京 100101
3. 中国科学技术大学生命科学学院, 安徽合肥 230026
基金项目:国家自然科学基金重点项目(39630190)、国家973重大基础研究(G1998010207)和洛克非勒基金(RF97001#590)课题的一部分
摘    要:水稻白叶枯病抗性基因Xa4已被定位于第11染色体长臂末端的分子标记VG181和L1044之间,并与抗性基因同源序列片段RS13共分离。利用这3个标记筛选IRBB56的BAC文库,共得到128个阳性BAC克隆,其中RS13获得18个阳性克隆,这18个克隆中有4个和6个我隆分别同时为G181和L1044的阳性克隆,选其中的12克隆进行分析,构建了一个从G181到L1044区间的BAC跨叠克隆,全长420kb,并且56M22、106P13和104B153个BAC克隆可覆盖整个跨叠克隆群。这一研究结果为进一步分离Xa4基因打下基础。

关 键 词:白叶枯病  细菌人工染色体  跨叠克隆群  抗病性  水稻
文章编号:0379-4172(2001)03-0236-08
修稿时间:2000年7月7日

Construction of A Bacterial Artificial Chromosome (BAC) Contig Encompassing the Bacterial Blight Resistance Gene Xa4 Locus in Rice
JIANG Guang--Huai,WANG Wen--Ming,XIE Bing,ZHAI Wen--Xue,LU Run--Long,ZHU Li--Huang.Construction of A Bacterial Artificial Chromosome (BAC) Contig Encompassing the Bacterial Blight Resistance Gene Xa4 Locus in Rice[J].Journal of Genetics and Genomics,2001,28(3):236-243.
Authors:JIANG Guang--Huai  WANG Wen--Ming  XIE Bing  ZHAI Wen--Xue  LU Run--Long  ZHU Li--Huang
Abstract:The gene Xa4 confers dominantly resistance to rice bacterial blight which has been finely mapped between RFLP markers G181 and L1044, and co-segregated with the resistance gene homologues sequence marker RS13. The three markers were used to screen a rice Basterial Artificial Chromosome (BAC library constructed from IRBB56, a Xa4--harboning indica variety, resulting in the detection of totally 128 positive clones. Of the 18 positive clones picked out by RS13, 4 and 6 clones were simultaneously detected by G181 and L1044, respectively. Based on their HindIII restriction patterns, 12 clones were selected out to construct a contig that spanned about 420 kb covering the Xa4 locus, which is a solid base for the isolation of Xa4 gene.
Keywords:bacterial blight bacterial artificial chromosome (BAC)  contig  disease resistance  rice
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