几个常用玉米自交系的优势类群分析

Heterosis Group Analysis or Several Common Corn (Zea Mays L.)Inbred Lines

通过完全双列杂交设计，利用杂种优势距离对１０个常用玉米自交系进行了聚类分析。结果表明，１０个自交系可划分为以下几个类群，即｛４７８，５００３，８１１２｝类群；｛Ｅ２８，中黄６４｝类群；｛Ｍ０１７，８１５１５，抗旱大粒黄｝类群和｛５３，综３１｝类群。最强的杂种优势模式在｛５３，综３１｝类与｛Ｅ２８，中黄６４｝类之间，其次在｛４７８，５００３，８１１２｝类与｛５３，综３１｝类以及与｛Ｅ２８，中黄６４｝之间。而｛Ｍ０１７，８１５１５、抗旱大粒黄｝类与｛Ｅ２８，中黄６４｝类以及与｛４７８，５００３，８１１２｝类间优势最弱。

Aggragate analysis of 10 common corn inbred lines was made by using heterosis distance from a 10 ×10 Griffing IV complete diallel cross design. According to the results,the 10 inbred lines can be divided into four groups, including group(478.5003. 8112),group(E28,Zhonghuang 64 ),group(M.17, 81515, Kong handalihuang)and group(53, zhong 31),The strongest heterosis model was between group (53, Zhong 31)and group (E28,Zhonghuang64),followed by that between group (E28, Zhonghuang64 ),followed by that between group(478,5003,811)and group(53,Zhong31)as well as,group(E28,Zhonghuang64).But the heterosis seemed weakest between group (Mo17,81515, kanghandallhuang)and group (E28,Zhonghuang64)as well as group(478,5003,8112).