玉米产量与株型性状的灰色关联度分析

采用灰色关联度分析法对不同玉米品种的小区产量与株型性状因素进行分析。结果表明:小区产量与单株粒重的关联度最大,其次与叶间距、株高、叶片数等玉米株型性状因素关联紧密,说明玉米的产量变化是单株穗粒重与株型各性状因素综合作用的结果。在玉米杂交选育中以杂交优势为基础结合株型育种,应注重叶间距、株高、叶片数、茎粗、茎叶夹角的选择。

Gray Correlative Degree Analysis Relationship between Yield and Plant-type Traits in Maize

Using the gray correlative degree analysis method, the relationship between the yield and plant-type of different maize varieties was analyzed. The results showed that the yield was the most closely correlated with grain weight per spike, the second was closely correlated with the maize plant-type traits such as leaf space, plant height and leaf amount, etc,which indicated that the changes of maize yield was the result of comprehensive effect of the characteristics of grain weight per spike and plant type traits. So we should breed hybrid maize on the basis of heterosis and at the same time combinate with plant-type breeding which focus on the choice of leaf space, plant height, leaf amount, stem diameter and leaf angle .