【摘要】 为研究玉米产量及相关性状之间的相互关系，以2020年黄淮海普通籽粒夏玉米区域试验中2种种植密度下共计65个品种为研究对象，对产量及相关性状进行统计分析、相关性分析和通径分析。结果显示，秃尖长变异系数最大，生育期变异系数最小；2种密度条件下，穗位与株高、秃尖长与株高和穗长均呈显著或极显著正相关；秃尖长与产量在高密度条件下呈极显著负相关，穗位与产量在低密度条件下呈极显著负相关，穗长与产量呈显著正相关；穗长对产量的正向直接效应最大。在黄淮海籽粒玉米品种选育过程中应注意适当控制玉米的生育期和株高，在高密度条件下要注重降低秃尖长，在低密度条件下要降低穗位、提高穗长。更多还原

【Abstract】 In order to study the relationship between maize yield and related characters, a total of 65 varieties under two planting densities in Huang-Huai-Hai summer maize regional trial in 2020 were studied.Statistical analysis, correlation analysis and path analysis of yield and related characters were carried out.The results showed that the coefficient of variation of bald tip length was the largest and that of growth period was the smallest.Under two kinds of density, there was a significant or extremely significant positive correlation between ear position and plant height, bald tip length and plant height and ear length, extremely significant negative correlation between bald tip length and yield under high density condition, and extremely significant negative correlation between ear position and yield under low density condition.There was a significant positive correlation between ear length and yield.Ear length has the greatest positive direct effect on yield.In the process of breeding Huang-Huai-Hai grain maize varieties, attention should be paid to properly controlling the growth period and plant height of maize varieties, reducing bald tip length under high density conditions, reducing ear position and increasing ear length under low density conditions.更多还原