不同类型玉米自交系数量性状配合力及聚类分析

摘要

The genetic effect of quantative traits of 13 maize inbred lines from different heterotic groups were analyzed according to Griffing Ⅱ . The cluster analysis of the 13 inbred lines and 5 control inbred lines was done by using SSR markers. The results concluded that the in-hreeds CML162.S181 ,HN06-10,SI47,Ye478 showed high combining ability; the main gene effects of axes diameter, rows per ear, kernel thick, 100-kernel weight, ear yield rate and barren ear tip length were additive affect; and the main gene effects of plant height, ear height, ear lenght, ear diameter, kernels per rowa, kernel length and kernel weight per ear were non-additive effect. According to the results of polymorphism analysis, 18 maize inbred lines have been classified into 7 groups: (i) Dan340, Yu5,HN06-10; (ii) B73,Ye478, Jingtian, CML162; (iii) Mol7,Tail91o2,Qingzhu,SI47; (iv)HZ4;(v)Qi319,S181, Zhengbaolie; (vi) GY302, CY923; And(vii) Taitian.%以13个不同类型的玉米自交系为材料,按格林芬方法Ⅱ遗传交配设计,分析了数量性状的遗传效应;采用SSR标记对这13个自交系及5个对照自交系进行了聚类分析.结果表明:自交系CM L162、S181、HN06-10、S147、掖478综合性状配合力表现优良;控制轴粗、穗行数、单粒厚度、百粒重、出籽率和秃尖6个性状的遗传以基因加性效应为主;控制株高、穗位高、穗长、穗粗、行粒数、粒长、单穗粒重7个性状的遗传以基因非加性效应为主.根据品种间的分子遗传多态性,将18个自交系划分成7个类群:丹340、渝5、HN06-10为一类;B73、掖478、京甜、CML162为一类;MO17、太191o2、青贮、S147为一类;HZA(黄早四)单独为一类;齐319、S181、郑爆裂为一类;GY302、GY923为一类;泰甜独立成一类.