Heterosis Analysis of Lodging Resistance Related Traits and Lodging Resistance Evaluation Based on Principal Component Analysis in Maize
The aim was to evaluate lodging resistance of germplasm in maize,and then breed maize hybrids with strong lodging resistance.In this study,four maize hybrids which were currently promoted in production were used as materials.Through measuring the lodging resistance related traits,mid-parent heterosis and over-parent heterosis of related traits were calculated.The results showed that there were significant or extremely significant differences in crushing strength,pushing strength and stem strength among different varieties,'Shuoyu 172'had higher crushing strength and stem strength,and'Shuoyu 173'had higher pushing strength.Compared with different lodging resistant related traits,mid-parent heterosis and over-parent heterosis of 5th internode length,stem diameter,plant height,ear height,and tassel branch number of 3rd,4th and 5th internode were relatively higher,indicating that the heterosis of these traits was relatively strong.Compared with the different materials,the parents of'Shuoyu 172','Zheng 58'and'H7235',and the parents of'Shuoyu 173','Z33-1'and'H7875S',had strong heterosis in crushing strength,stalk strength,tassel branch number,tassel main axis length and angle of ear.The stem diameter plant height,ear height,ear leaf length and width of 3rd,4th and 5th internode between the parents of'Baojing 186','Z33-1'and'H7875A',and the parents of'Zhengdan 958','Zheng 58'and'Chang 7-2'had strong heterosis.Principal component analysis were used to evaluated lodging resistance of different varieties,the results showed that the lodging resistance of'Shuoyu 172'was the strongest(Y:1.401),followed by'Shuoyu 173'.This study indicated that both of'Shuoyu 172'and'Shuoyu 173'had strong lodging resistance.
NETL
NSTL
万方数据
