玉米杂交种的产量比较及主要农艺性状的相关和通径分析

本试验选用本所选育和引进的17个玉米杂交种为供试材料，采用随机区组设计。通过对各杂交种的产量、生育期和综合农艺性状的分析，选出了高产、优质、抗逆性强、生育期适中的杂交种CX-711、中单9409、CX-649、CX-712、CX-777、CX751等。经过对产量、千粒重、出籽率。穗长、穗粗等11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千粒重(r=0.5411^*)，相关系数达显著水平。穗粗(r=0.4767)，出籽率(r=0.4067)和穗长(r=0.14)与产量的关系呈正相关。性状之间株高与穗位高和茎粗(r=0.8222^**，(r=0.7606^**)、穗长与行粒数(r=0.7065^**)之间呈极显著正相关。指出提高千粒重，增加穗粗和穗长，提高出籽率并兼顾其他农艺性状是提高玉米产量的有效途径。

Yield Performance of Maize Hybrids and Analysis of Correlation between Yield and Agronomic Characteristics

To determine the yield Performance and the correlation between yield and agronomic characteristics of maize hybrids,seventeen bybrids were tested by using a Randomized Complete Block Design.The result shows that the hybrids CX_711,ZHONGDAN9409,CX_649,CX_712,CX_777 and CX_751 obtained higher yield with good agronomic characters.The most contribution to the yield is from 1000_grain weight with r value of (r=0.541 1 * ),the following is ear diameter(r=0.476 7),shelling percentage (r=0.406 7 )and ear length(r=0.14).The correlation value shows highly significant differences at 1% level between plant height and ear height(r=0.822 2 ** ),plant height and stalk diameter(r= 0.760 6 ** ) as well as ear length and row number(r=0.706 5 ** ).