利用普通玉米自交系丹232与爆裂玉米自交系N04为材料，构建含有258个家系的重组近交系群体。在新乡、温县和郑州不同环境条件下进行田间试验，分析8个穗粒性状的表现及其环境稳定性。联合方差分析表明，各性状家系间和环境与区组互作显著或极显著；地点间穗长、穗粗、穗重、穗粒重和百粒重差异显著或极显著；除穗粗和秃尖长外，其余性状的家系与地点互作达到显著或极显著水平。F₉群体各性状多呈连续正态分布，并表现超双亲分离。穗行数与穗长相关不显著；秃尖长与穗长、穗粗、穗行数、行粒数、百粒重相关不显著；其他各性状间均呈显著或极显著相关。

Two hundred and fifty-eight RILs were developed from the cross between a dent corn inbred Dan232 and a popcorn inbred N04. Eight ear-kernel characters and their stability across different environments were analyzed. Combined analysis of variance showed that the mean squares due to families, family ×replication interactions were all significant or highly significant for all characters. The mean squares due to environments were significant for ear length, ear diameter, ear weight, ear grain weight and 100-grain weight. Other than ear diameter and barren ear tip length, the mean squares due to family×environment interactions were all significant or highly significant for other traits. All traits showed continuous variations with a normal distribution and obvious segregation beyond the two parents. Correlation analysis showed that there were significant or highly significant correlations among most traits besides kernel rows per ear with ear length, and barren ear tip length with ear length, ear diameter, kernel rows per ear, kernels per row and 100-grain weight.

河南省自然科学基金(0511032900)