水稻单片段代换系群体的构建及研究进展

 单片段代换系是进行基因分析特别是QTL分析的理想材料。建立单片段代换系,不仅可以挖掘和利用新的基因资源,大大提高QTL定位的准确性和精确性,而且使基因鉴定、基因定位、分子标记辅助选择和育种这些不连续的环节紧密联系在一起,还可以实现植物分子育种从个别基因利用到基因组的综合开发利用的跨越式发展,同时为基因聚合育种工程积累丰富的基因资源。鉴于其在水稻研究中的重要意义及其在育种中的广泛应用,本文综述了水稻单片段代换系的构建和应用现状,提出应进一步扩大单片段代换系的构建规模,充分挖掘其作为育种材料的潜在应用价值。

Development and Advances of Single Segment Substitution Lines in Rice

The single segment substitution lines(SSSLs) were perfect materials for analysis of gene especially for QTL.Developing the SSSLs can not only search and use the new gene resource,greatly improve veracity and accuracy of QTL mapping,but also can get those discontinuous segment together such as identify of gene,gene mapping,maker-assisted selection and breeding.Additional,using the SSSLs can achieve the development of span mode of plant molecular breeding from utilizing single gene to synthetically exploiting genome,whereas,it can accumulate abundant gene resource for gene converge breeding engineering.Hence the paper summarizes the development and advance of SSSLs in rice,the main issues have been proposed for further research the breeding applications of the SSSLs.