摘要
甘薯(Ipomoea batatas(L.)Lam.)作为世界上一种重要的粮食、饲料、工业原料及新型能源作物,从有性生殖F1选择优良实生系进行选择育种一直是甘薯育种的重要方式。为了优化甘薯杂交育种方法,合理选配杂交组合,提高育种效率,本试验利用SSR标记研究了甘薯杂交群体基于SSR标记及13个农艺性状的遗传多样性,得到了群体内的聚类图,并且筛选出了甘薯的高产株系。群体SSR标记的聚类分析结果显示,群体材料与各亲本遗传距离比较远,被聚为3类,而亲本单独聚在另外一类。13个农艺性状的聚类将亲本与部分群体材料聚在了一起,且将群体材料和亲本材料作为一个整体时,其遗传距离的变异高达30%以上,远远高于SSR标记所获得的遗传变异系数。
Ipomoea batatas（ L.） Lam.,is an important food crop which can be used as an industry material,a new energy resource and forage crop in the world. The main method of sweet potato breeding has commonly been selecting excellent materials from sexual reproduction F1 generation. In order to optimize the sweet potatos hybrid breeding methods so as to match reasonable hybrid combinations and improve breeding efficiency,in this experiment,hybrid groups of sweet potato were studied based on SSR markers and 13 angronomic traits,and the cluster diagrams of the groups were obtained. High-yield strains were selected through this experiment. From cross group of SSR markers clustering analysis results,the distance between group materials and parents was far,group materials were clustered in three classes,while parents gathered in another kind. The cluster analyses based on 13 angronomic traits of sweet potato hybrid groups herded parents with some group materials together,then its variation of genetic distance was up to30% when group materials and parents were taken as a whole,which was far higher than that of SSR markers.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2015年第2期282-287,共6页
Journal of Plant Genetic Resources
基金
国家自然科学基金资助项目(31101192)
重庆市应用开发计划项目重点项目(cstc2013yykf B80010)
中央高校基本科研业务费专项(XDJK2014B038)
重庆市"十二五"动植物良创专项(CSTC2012gg B80007)
关键词
甘薯
群体材料
遗传多样性
sweet potato
group materials
genetic diversity
