鲜食甜玉米主要性状的灰色关联度、相关及通径分析

以20个甜玉米(Zea mays L.cv.Sweet)杂交组合为对象,对其鲜质量以及株高、穗位高、穗长、秃尖长、穗粗、穗行数、行粒数、茎粗、叶片数、穗上叶数、穗位叶长和穗位叶宽等12个主要农艺性状指标进行了调查,并与鲜质量进行了灰色关联度、相关及通径分析.结果表明,甜玉米植株田间农艺性状与鲜质量相关程度较小;穗粗、行粒数、穗长与鲜质量呈极显著正相关;果穗粗、行粒数、穗长对鲜质量的直接影响较大,穗行数对鲜质量的间接影响较大.认为在高产甜玉米育种中,应重视穗粗和穗长的选择.

Grey correlation,correlation and path analysis on main agronomic characters in sweet corn

Twenty sweet corn crosses were studied by randomized block design in this paper. Many traits had been investigated such as, fresh weight, plant height, ear height, ear length, bare top length, ear diameter, kernel row number per ear, kernel number per row, stalk diameter, leaf number, leaf number above ear, ear leaf length and ear leaf width. The grey correlation, correlation and path analysis between main agronomic characters and the effects on sweet corn yield were investigated. The results showed that most of the field agronomic characters had little impact on the fresh weight and that the most significant correlations were detected between ear diameter, fresh weight, kernels per row, rows per ear, ear weight, ear length and ear weight, in which ear diameter, kernels per rows, ear length had great direct impact on ear weight. Therefore, in order to improve the yield of the sweet corn, ear diameter and rows per ear should be considered dominantly.