玉米自交系京2416×京92改良后代收获时子粒含水量配合力分析

利用玉米黄改群自交系京2416和京92及其213个改良后代为基础材料,以京464、京724、京MC01为测验种,采用NCII杂交设计方法,杂交组配得到645个组合,调查杂交组合收获时子粒含水量,分析213个改良后代收获时子粒含水量的配合力及遗传特性。结果表明,收获时子粒含水量一般配合力优于原始高值亲本的自交系有京2416J92-049等68个,特殊配合力优于原始高值亲本的杂交组合有京2416J92-192×京464、京2416J92-210×京724、京2416J92-009×京MC01等177个。结合一般配合力和特殊配合力筛选出京2416J92-192×京464、京2416J92-210×京724、京2416J92-200×京MC01等57个优良杂交组合。通过遗传参数分析表明,收获时子粒含水量的广义遗传率为73.70%,狭义遗传率为65.82%,可以进行早代选择。

Combining Ability Analysis of Kernel Water Content at Harvest of Jing2416×Jing92 Improved Inbred Lines

In this experiment, Huanggai group inbred lines Jing2416, Jing92 and 213 improved inbred lines were used as experimental materials, and Jing464, Jing724, JingMC01 were used as testers to combine 645 hybrid combinations by NCII hybrid design method. The analysis of combining ability and genetic parameters of kernel water content at harvest was carried out. The results showed that 68 inbred lines such as Jing2416J92- 049, Jing2416J92 -074, Jing2416J92-101 were excellent than high-value parent in general combining ability. 177 hybrid combinations such as Jing2416J92-192×Jing464, Jing2416J92-210×Jing724, Jing2416J92-009×JingMC01 were excellent than high-value parent in special combining ability. Based on GCA and SCA, 57 excellent hybrid combinations such as Jing2416J92-192×Jing464, Jing2416J92-210×Jing724, Jing2416J92-200×JingMC01 were selected. According to the analysis of genetic parameters, the generalized heritability of kernel water content at harvest was 73.70%, and the narrow heritability was 65.82%, so this trait should be selected in the early generation.