玉米株型与穗部某些性状相关性的研究

Study on Relationship of Certain Characters between Maize Plant Shape and Spike

1998年对 6个玉米品种的穗位叶叶长 ,穗位叶及穗位叶上一、二叶 ,下一、二叶的茎叶夹角 ,玉米果穗直径 ,穗轴直径 ,穗粒列数性状特征进行了分析和研究 ,结果表明 :穗位叶叶长与果穗直径密切相关 ,其相关系数r为 0 95 6 1,即穗位叶长的品种表现出穗的直径大 ,穗粗。近穗位叶茎叶夹角平均值与穗轴直径及穗的子粒列数呈显著的负相关 ,其相关系数r分别为 - 0 972 5和 - 0 936 9。茎叶夹角大的品种穗轴直径小 ,穗的子粒列数少。茎叶夹角小的品种 ,穗轴直径大 。

The spike leaf length,the included angle of stem to spike leaf,up-leaf l,up-leaf 2,down-leaf 1,down-leaf 2,maize spike diameter,Spike axis diameter,Spike row number of 6 maize strains were analysed and studied in 1998.The result showed that the spike leaf length and maize spike diameter had close positive coorelation and their correlation coefficient is 09561,which means that the longer Spike leaf is,the bigger the spike diameter will be.The included angle of stem to leaf on maize row number is notable negtive correlation,So is the inchuded angle of stem to leaf on spike axis diameter.Their correlation coefficient r is 09725 and -0.9369 respectively,The smaller of the included angle of stem to leaf is,the more the maize row number and the bigger spike axis diameter.