稻田春播杂交玉米产量与主要农艺性状的相关及通径分析

目的]对稻田春播杂交玉米产量与主要农艺性状进行相关及通径分析。方法]以湘南丘陵山区稻田春播的15个杂交玉米品种为材料，采用相关分析和通径分析方法分析了玉米品种8个主要农艺性状与产量的相互关系。结果]株高、穗位高、行粒数与产量呈极显著正相关；主要农艺性状对产量的直接通径系数的大小依次为：行粒数〉百粒重〉穗行数〉秃顶长〉株高〉穗长〉穗位高〉穗粗。行粒数对玉米产量的影响主要取决于直接作用；株高、穗位高、穗长、穗粗、秃顶长对玉米产量的影响主要取决于间接作用；穗行数和百粒重对玉米产量不但有较强的直接影响，而且还辅助其他性状对玉米产量产生较大的间接作用。结论]进一步明确了各性状在产量构成因素中的效应大小及对产量的相时重要性，为湘南丘陵山区稻田春播杂交玉米引种及高产栽培提供理论依据。

Correlation and Path Analysis between Main Economical Characters and Yield of Hybrid Corn Sowed in Spring and Cultivated in Rice Field

Objective] The research aimed to make the correlation and path analysis between main economical characters and yield of hybrid corn sowed in Spring and cultivated in rice field.Method] The relationship between 8 main economical character and yield of 15 hybrid corn sowed in Spring and cultivated in rice field in hilly region of southern Hunan Province were analyzed by correlation analysis and path analysis.Result] The results showed that the yield had extremely significant positive correlation with plant height, ear height, row grains.The main economical character in order of direct effect to yield was row grains>100-grain weight>ear rows>bald length>plant height>ear length>ear height>ear width.The effects of row grains to corn yield were mainly direct.The effects of plant height, ear height , ear length , ear width and bald length to corn yield were mainly indirect.The effects of ear rows and 100-grain weight to corn yield were not only more direct but also more indirect.Conclusion] The study deeply confirms the effects and the relative importance of different characters to yield, and provides the theoretical basis for the introduction and high yield cultivation of hybrid corn sowed in Spring and cultivated in rice field in hilly region of southern Hunan Province.