杂交玉米主要农艺性状与产量的遗传相关性及通径分析

Analysis of Genetic Correlation and Path Coefficient between Eight Main Agronomic Characters and Yield of Hybrid Corn

对杂交玉米的8个主要农艺性状与产量的遗传相关性和通径系数进行了分析,结果表明:各农艺性状与产量的相关系数大小依次为行粒数、千粒重、籽粒长、穗长、出籽率、穗行数、穗粗、秃尖长;各农艺性状与产量的直接通径系数大小依次为千粒重、行粒数、穗行数、出籽率、穗长、穗粗、籽粒长、秃尖长。选育高产玉米杂交种,首先要选择行粒数和千粒重均较大的品种,适当重视选择穗行数多的品种,同时兼顾其他性状,协调好各性状的关系。

The genetic correlation and the path coefficient between eight main agronomic characters and yield of hybrid corn were analyzed. The results showed that the correlation coefficient between each agronomic character and yield ordered from large to small as kernels per row, 1 000-kernel weight, kernel length, ear length, kernel setting ratio, row number per ear, ear diameter, bared tip length. The direct path coefficient between each agronomic character and yield ordered from large to small as 1 000-kernel weight, kernel number per row, row number per ear, kernel setting ratio, ear length, ear diameter, kernel length, bared tip length. Breeding of high-yielding hybrid maize, it should choose the varieties with more kernel number per row and high 1 O00-kernel weight, and pay attention to varieties with more row number per ear, meanwhile, other characters should be good, and the relationship between the various characters should be coordinated.