玉米种子活力田间测定及其遗传分析

Determination and Genetic Analysis of Seedling Vigor in Field on Maize

以12个玉米自交系为试验材料,按不完全双列杂交试验设计组配35个杂交组合,对种子出苗势、出苗率、出苗指数、活力指数等种子活力指标进行配合力及遗传参数分析。结果表明:同一亲本种子活力4个性状间及同一性状12个亲本间的一般配合力(GCA)效应存在显著差异,12个亲本自交系中K1516的GCA效应表现最优,A3519表现最差;种子活力的特殊配合力(SCA)效应与GCA效应之间关系复杂,不能依靠双亲的GCA效应来推断其后代的SCA效应;种子活力各指标的广义遗传力都超过50%,狭义遗传力均超过30%,并且加性效应都大于非加性效应,表明这些指标可以作为种子活力早代选择的依据;千粒重与种子活力相关性很低。

Twelve inbred lines which collected or selected were tested in this experiment,7 inbred lines were as females and 5 inbred lines were as males.Thirty five hybridized combinations were designed with incomplete diallel crossing.Germination tendency,germination percentage,germination index and vigor index etc,4 characters were de-termined.Their combining ability and genetic parameter analyzed.The results suggested that GCA effects were signif-icant of difference in 4 characters of the same parent and among 12 ...