Abstract:

The ear-leaf and stem of maize affect directly yield of corn plant, so it is important to determine the interplay between the ear-leaf and the stem. Six maize single-cross hybrids of ‘Qiandan 16’, ‘Guidan 8’, ‘Qianhuanuo’, ‘Denghai 11’, ‘Xianyu 335’, ‘Zhengdan 958’ and two maize populations of ‘Pingtanghuang’, ‘Zhongqun 11’ were planted to study the correlation between the ear-leaf and the stem. At the end of the growing period , plant height, ear height, stem diameter, ear-leaf length, ear-leaf breadth were measured on the basis of corn plant. The results showed that the ear-leaf breadth had significant correlations with stem diameter(p<0.001) in total materials while the correlations between other economical characters were unstable. On the other hand, single-cross hybrids had more significant correlation between ear-leaf breadth and stem diameter than populations; the ratio between ear-leaf breadth and stem diameter is stable in the same material but different in the different materials. All these results showed that in Guiyang region at the end of growing maize ear-leaf breadth had markedly consistency with stem diameter; the consistency was changeless in total materials and the ratio was convertible in different materials; the consistency and the ratio were determined by heredity.