夏玉米品系(种)的产量比较及主要农艺性状的关联度分析

目的]研究淮北地区夏玉米品系(种)的产量与主要农艺性状关联度。方法]运用灰色关联度分析方法,研究14个夏玉米品系(种)的产量与10个主要农艺性状间关联的主次关系及各性状间的相互关联程度。结果]有76.9%品系的产量显著高于对照郑单958;主要农艺性状与产量关联度大小依次为秃尖长、株高、穗行数、穗长、行粒数、穗位高、百粒重、倒伏倒折率、出籽率、穗粗。结论]在育种实践中应尽可能选择秃尖短、株高中等偏上、穗行数较多和穗长较长的品系。

Comparison of Yield and Correlation Degree between Main Agronomic Traits of Summer Maize Lines( Varieties)

Objective] The yield of summer maize and correlation degree of agronomic traits in Huaibei region were studied. Method] Based on the grey relational analysis method,the relationship between the yield of 14 summer maize lines( varieties) and 10 main agronomic traits and the correlation between the traits were studied. Result] The yield of 76. 9％ lines was significantly higher than that of control Zhengdan 958. The correlation degree order of main agronomic traits and yield was as follows:bare top length,plant height,ear row number,ear length,row grains,ear height,100-seed weight,lodging and stem broken rates,seed-producing percentage,ear diameter. Conclusion] In the breeding prac-tice, we should choose the long lines of the bald tip shorter,plant height higher,ear rows more.