摘要： 利用黄淮海地区分属于不同杂种优势群的21个普通玉米自交系为母本, 以引进中国农业大学选育的8个ALEXHO高油玉米自交系为父本, 采用NCⅡ遗传设计, 测定并分析了高油玉米杂交当代单株产量和籽粒油分含量的配合力。结果表明: GY246A的单株产量和籽粒油分含量的GCA均为极显著最大正值, 具有较高的直接组配价值, 其次为GY246B和GY220。8085泰、246、P138、8622和87-1单株产量和籽粒油分含量的GCA均为极显著正值或显著正值, 应进一步利用这些自交系与ALEXHO高油玉米自交系较强的杂种优势。246×GY246B、Q1261×GY246A和478×GY956在单株产量和油分含量的SCA均较高, 其中246×GY246B单株产量居首位, 较对照增产25.96%, 油分含量为6.6%, 具有较高的生产利用价值。

关键词: ALEXHO高油玉米自交系, 普通玉米自交系, 单株产量, 油分含量, 配合力

Abstract: Based on NC II design, 168 crosses were made from 21 normal corn inbreds from different heterotic groups in Huanghuaihai Region as female parents and 8 ALEXHO high oil corn inbreds from China Agricultural University as male parents, which were grown in a randomized complete-block design experiment with three replications, and the GCA and SCA of per-plant yield and kernel oil content of F₁ Embryo were analyzed. The results were as follows: the GCA of per-plant yield and kernel oil content for GY246A were significant at 0.0l level, showing the direct utilization value in breeding, followed by GY246B and GY220. The GCA of peagplant yield and kernel oil content for 8085tai, 246, P138, 8622 and 87-1 were signfficant at 0.0l level or 0.O5 level, so their heterosis could also be used in breeding. The SCA of per-plant yield and kernel oil content in crosses 246 x GY246B, Q1261 x GY246A and 478 x GY956 were higher than in other cxosses. The per-plant yield of 246 x GY246B was the highest among all the crosses, 25.96% higher than CK hybrid, and its oil content was 6.6%, presenting a great utilization value in corn production.

Key words: ALHO high oil corn inbreds, Normal corn inbreds, Pet-plant yield, Kernel oil content, Combining ability

中图分类号: 

• S513.03