玉米联合体昭通试点45个参试品种产量和穗部性状表现及相关通径分析

Performance and Correlation Path Analysis of Yield and Ear Characters of 45 Maize Varieties in Zhaotong Maize Regional Trials

在昭通昭阳试验点,对2018—2021年玉米联合体试验中45个参试品种的产量和穗部性状表现进行相关及通径分析。结果表明,45个参试品种的产量、出籽率、穗长、百粒重、行粒数等性状呈上升趋势,穗粗、穗行数变化趋势不明显,秃尖呈下降趋势。产量与穗部性状相关分析表明,穗部性状对籽粒产量的相关系数依次为出籽率(r=0.405)>穗粗(r=0.303)>行粒数(r=0.287)>穗长(r=0.237)>百粒重(r=0.198)>穗行数(r=0.081)>秃尖长(r=-0.173)。产量与穗部性状通径分析表明,穗粗(0.412)>出籽率(0.402)>穗长(0.148)>百粒重(0.066)>行粒数(0.01)>穗行数(-0.078)>秃尖(-0.102)。

The correlation and path analysis were conducted on the grain yield and ear traits of 45 maize varieties tested in the maize regional trials from 2018 to 2021 in Zhaoyang of Zhaotong.Results showed that the grain yield,kernel rate,ear length,100-grain weight,kernels per row of the 45 tested varieties showed an upward trend,while the ear diameter and the ear rows did not change significantly,and the bare tip length showed a downward trend.Correlation analysis between grain yield and ear traits showed that the correlation coefficients of ear traits to grain yield were kernel rate(r=0.405)>ear diameter(r=0.303)>kernels per row(r=0.287)>ear length(r=0.237)>100-grain weight(r=0.198)>ear row(r=0.081)>bare tip length(r=-0.173).Path analysis of grain yield and ear traits showed that ear diameter(0.412)>kernel rate(0.402)>ear length(0.148)>100-grain weight(0.066)>kernels per row(0.010)>ear row(-0.078)>bare tip length(-0.102).