鲜食甜玉米主要农艺性状对产量的效应

通过分析鲜食甜玉米的11个主要农艺性状与鲜穗产量的关系,为鲜食甜玉米高产品种选育的性状选择提供了理论依据。试验结果表明,各性状中与产量的相关系数和直接通径系数最大的4个性状为穗粗、行粒数、生育期、出籽率;在性状选择时应高度重视对穗粗、行粒数、出籽率和穗行数的选择,尽量选择较好的表现型;在生产季节及市场需求条件允许前提下选择生育期较长的品种,同时要保证一定的株高、穗长,对穗位高、粒深、百粒重、秃尖长可放宽选择尺度。

Effect of main agronomic characters on yield of fresh-eating sweet maize

In order to provide reference for selecting characters of high yield fresh-eating sweet maize varieties,the correlation and path analysis among maize yield and 11 major agronomic characters were analyzed.The results showed that all of those characters,four characters such as ear thickness,grains per row,growth duration and grain-set percentage had the highest correlation coefficient and direct path coefficient to the yield so that more attention should be paid to these four characters while selecting characters for breeding. On the premise that the production season and market demand permitted,the longer growth duration should be selected and some given plant height and ear length should be assured,while the selection of ear height,grain depth,100-grains weight and bald length could be broadened.