温带高油玉米自交系与热带玉米自交系配合力分析

Analysis on Combining Ability Between Temperate High-oil Maize Inbred Lines and Tropical Maize Germplasms

采用GriffingⅥ对6个国内温带高油系和4个热带系进行组配,将组配的45个杂交组合在云南省昆明、德宏两种不同的生态环境下进行农艺性状配合力分析和遗传参数估算。结果表明:热带系YML146、CML166、CML161、CML171是综合性状配合力表现较优良的种质材料,在高油玉米生产及育种上具有较大的利用潜力,是拓宽温带高油玉米种质遗传基础较好的种质资源;产量特殊配合力(SCA)效应值为正值的组合多数为温带高油系×热带系和热带系×温带高油系,说明温带高油玉米种质与热带种质具有较大的遗传差异,该组合模式具有较大利用价值。主要农艺性状的加性方差均大于非加性方差,说明这些性状主要表现加性遗传效应,可在早期世代进行选择。

Six local temperate high-oil maize inbred lines were corssed with four tropical maize inbred lines which combined 45 testcrosses.These testcrosses were field-tested for agronomic trait performances and estimation of genetic parameters under two environment including Kunming and Dehong of Yunnan province based on Griffing Ⅳ design.The results showed that the tropical maize inbred lines YML146,CML166,CML161,and CML171 with high combining ability for various agronomic traits were very useful germplasms for bro...