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化学诱导激活型拟南芥突变体库的构建及分析 被引量:25

Generation of Chemical-inducible Activation Tagging T-DNA Insertion Lines of Arabidopsis thaliana
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摘要 利用化学诱导激活XVE(LexA-VP16-ER)系统构建了一个包含40000余个独立转化株系的拟南芥突变体库,并对其中的18000余个株系进行了初步的遗传学和表型分析鉴定。卡那霉素抗性分离比表明,51.6%的株系为单位点插入株系,T-DNA插入的平均拷贝数为每株系1.38个。部分T1代和T2代植株表现出了可见的形态变异,包括下胚轴长度、根长度、植株大小和颜色、叶子颜色和形态、开花时间、种皮颜色及结实情况等。对数个代表性突变株系表型及T-DNA插入位点侧翼序列进行了分析,结果表明突变体的表型是由于T-DNA的插入造成的,而且这些突变体中包括前人发现的AP2和AGAMOUS的等位基因。由于T-DNA标记或相邻的基因可被XVE系统诱导性的激活,或被T-DNA破坏导致功能缺失,该突变体库可以用于大规模筛选鉴定功能缺失性和功能获得性突变体。 Using an estrogen-inducible expression XVE (LexA-VP16-Estragon Receptor) system, we have generated approximately 40 000 independent T-DNA insertion lines of Arabidopsis thaliana. Segregation analyses of about 18 000 lines indicated that 51.6% of them contain single T-DNA insertions and that the average insertion number is 1.38 copies per line. Mutants displaying a variety of morphological alterations were identified, including those that affect development of roots, hypocotyls, leaves, floral organs and seeds as well as the flowering time.
出处 《Acta Genetica Sinica》 SCIE CAS CSCD 北大核心 2005年第10期1082-1088,共7页
基金 国家高科技研究发展计划(863)项目(编号:2001AA225021 2003AA225021) 国家自然科学基金优秀创新团队项目(编号:30221002) 中国科学院知识创新工程重要方向性项目(编号:KSCX2-SW-308)~~
关键词 拟南芥 诱导性激活 突变体 T—DNA XVE Arabidopsis thaliana inducible activation tagging mutants T-DNA XVE
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