玉米杂交种主要农艺性状的相关和通径分析

[目的]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。[方法]以自主选育的66个玉米杂交组合为研究对象,通过随机区组品比试验,进行产量与主要农艺性状的相关和通径分析。[结果]产量与穗粗和千粒重呈极显著正相关,与穗位和出籽率呈显著正相关,由逐步回归分析方程通过了显著性检验,回归系数t检验也在显著水平,千粒重、行粒数和穗行数对产量均有显著的正影响。[结论]该研究可为高产型玉米的选育提供一定的理论依据。

Correlation and Path Analysis of Major Agronomic Character of Maize

[Objective]Relative importance of main agronomic traits in maize yield components was studied in Cangzhou ecological type area.[Method]Using autonomy breeding 66 maize combinations as test materials,the correlation and path analysis of yield and agronomic traits of maize combinations were made by the randomized block experiment.[Result] The yield was very significantly correlated with ear diameter and 1 000-seed weight and there was a high positive correlation between yield and ear height and seed-producing percentage.The equation passed the test of significance and the regression coefficient was in significant level by stepwise regression analysis.The yield was very significantly correlated with 1 000-seed weight,kernels per row and rows per ear.[Conclusion]The research can provide an important basis for high yield maize breeding.