西昌地区玉米杂交种单株产量与主要农艺性状相关性分析

对130个玉米杂交种的株高、百粒重、穗行数等12个农艺性状与单株产量进行了相关分析,结果表明,单株产量与穗重、行粒数、穗粗、百粒重、穗长均呈极显著正相关,相关系数分别为0.98403、0.70197、0.70007、0.65396、0.52793;而穗重与穗粗、行粒数、百粒重、穗长也呈极显著正相关。进一步通径分析表明,各性状对产量的直接效应依次为穗重>穗长>行粒数>穗轴粗>穗行数>穗位高>百粒重>穗粗>穗位叶宽。因此,在西昌地区玉米育种工作中,增大穗长和行粒数,提高穗位高和穗位叶宽,并注重其他性状的选择,是获得玉米高产的科学有效办法。

Analysis of Correlation and Path betweenYield andAgronomic Characteristics of Maize Hybrids in Xichang Region

The report is based on analysis of correlation between yield per plant and twelve agronomic characteristics of 130 hybrids. The result showed that the most contribution to the yield is from ear weight(r= 0.98403),the following is row-grain number(r=0.70197),ear diameter(r=0.70007),100-grain weight(r= 0.65396),and ear length(r=0.52793);the correlation value showed highly significant differences at 1% level between ear weight and ear diameter,100-grain weight,row-grain number and ear length. The results of pa...