夏玉米杂交种产量性状与产量的通径分析

选用30个玉米杂交种为供试材料,采用随机区组设计。经过对产量、穗长、行粒数、穗行数、千粒重等6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(r=0.5366),相关系数达显著水平。穗长(r=0.4989)、千粒重(r=0.4512)与产量的关系呈正相关。提高行粒数和千粒重,增加穗长并兼顾其他农艺性状是提高玉米产量的有效途径。

Path Analysis of Yield and Yield Characteristics of Summer Maize Hybrids

To determine the yield performance and the correlation between yield and agronomic characteristics of maize hybrids,thirty hybrids were tested by using a randomized complete block design.The most contribution to the yield was from grains per row with value of(r=0.536 6),the following was ear length(r=0.498 9),1 000-grain weight(r=0.451 2).The correlation value showed highly significant differences at 1% level between grains per row and rows per ear(r=0.599 4),grains per row and plant height(r=0.3218) as well as ear length and 1 000-grain weight(r=0.801 1).To enhance grains per row and 1 000-grain weight,increase ear length and give dual attention to other agronomic characters was an effective way to enhance the corn yield.