【摘要】 为探索沧州生态类型区主要农艺性状在玉米产量构成中的相对重要性,以及不同类型品种之间的差别,以自主选育的116个不同类型玉米杂交组合为研究对象,通过随机区组品比试验,进行主要农艺性状的相关和通径分析。结果表明:2000年前传统育种材料育成品种,产量与穗长和千粒重呈极显著正相关,对产量贡献作用最大的是千粒重;从2000年至今的新型育种材料育成品种,产量与穗长和行粒数呈极显著正相关,对产量作用贡献最大的是行粒数,与传统材料育成品种的分析结果有所不同,原因是因育种目标改变而引进新育种材料,但仍需进一步验证。更多还原

【Abstract】 The correlation and path analysis of agronomic traits of 116 types of maize combinations were carried out with the randomized block experiment, to explore the relative importance of main agronomic traits in maize yield composition and the differences among varieties in Cangzhou ecological type area. The results showed that the yield of traditional breeding materials before 2000 was very significantly correlated with ear length and 1000-seed weight. The greatest contribution to yield was made by 1000-seed weight. The yield of new breeding materials since 2000 was very significantly correlated with ear length and row grains. The greatest contribution was made by row grains. The main reason is that the new breeding materials are introduced due to the replacement of breeding targets, which still need further validation.更多还原