吉林省晚熟玉米杂交种主要农艺性状与产量的相关和通径分析

本试验选用30个晚熟玉米杂交种为供试材料,采用随机区组设计。经过对行粒数、株高、穗行数、千粒重、穗位高等5个农艺性状进行相关分析和通径分析表明,对产量影响最大的因素是行粒数(P0.4=0.834 5**,r=0.805 6**)和千粒重(P0.3=0.527 0**,r=0.584 9**),相关和通径系数都达极显著水平,其次是穗行数,株高,穗位高。指出在吉林省晚熟玉米育种中,提高行粒数和千粒重,适当增加穗行数并兼顾其他农艺性状是提高玉米产量的有效途径。

Correlation and Path Analysis between Yield and Main Agronomic Characters of Late-maturing Maize Hybrids in Jilin Province

Thirty late—maturing maize hybrids were tested using a randomized complete block design. Correlation and path between yield and main agronomic characters was analyzed. The most contribution to the yield was from number of kernels per row and thousand-seed weight with p and r value (P0.4 = 0.8345**, r=0.8056~(**), P0.3 =0.5270~(**), r =0.5849~(**)). The correlation value showed highly significant differences at 1% level. The following was number of rows per ear, plant height and ear height. It was pointed out enhancing number of kernels per row and thousand-seed weight, increasing number of rows per ear properly and giving dual attention to main agronomic characters is an effective way to enhance the corn yield in late-maturing maize breeding of Jilin province.