摘要
以一个栽培稻(OryzasativaL.sp.indica)和野生稻(O.rufipogonGrif)杂交的F2作图群体以及由该群体构建的RFLP标记连锁图,分析了微卫星DNA和AFLP标记的多态性、遗传行为及其在染色体上的分布。共定位了28个微卫星DNA标记和172个AFLP标记。28个微卫星DNA标记中有6个为华中农业大学作物遗传改良国家重点实验室根据数据库中序列而设计,其余22个来自美国Cornel大学已发表的结果。172个AFLP标记出自25对引物扩增得到的228个多态性带的片段。这些标记分布于水稻的12条染色体。将此200个PCR标记与华中农业大学作物遗传改良国家重点实验室构建的RFLP连锁图整合,得到一张含612个分子标记位点的遗传连锁图。
SSR (simple sequence repeat) and AFLP (amplified fragment length polymorphism) are PCRbased molecular markers developed in recent years. In this study, the authors analyzed the polymorphisms, inheritance and distribution of SSR and AFLP markers using an F2 population from a cross between cultivar “Aijiao Nante” (Oryza sativa L. ssp. indica) and an accession of the common wild rice (O. rufipogon Griff). A total of 200 new markers were obtained including 28 SSR and 172 AFLP markers. Six of the 28 SSR markers were developed by National Key Laboratory of Crop Genetic Improvement (NKLCGI) using DNA sequences from GenBank and the other 22 were from data published previously. The 172 AFLP markers were from a total 228 polymorphic bands amplified using 25 selected primer combinations. Mapping of the 200 new markers using NKLCGI'S previously developed RFLP map based on the same F2 population resolved these markers to all 12 rice chromosomes. Integration of the SSR and AFLP markers into the RFLP map resulted in a high density molecular linkage map containing 612 polymorphic loci.
基金
中国水稻基因组计划
美国洛克菲勒基金