【摘要】 分析了河南省1973～1986年14年夏玉米区域试验共151个杂交种的产量与穗粒结构的关系,结果表明:当亩产量自348.1公斤增加到444.1公斤时,起主要作用的是千粒重的提高,其次是穗行数和行粒数;当亩产量自444.1公斤增加到496.9公斤时,起主要作用的是行粒数和穗行数的增加,千粒重则保持在300克的水平.因此,在选育亩产500公斤以上的玉米杂交种时,需要协调好穗行数、行粒数和千粒重的关系,使千粒重保持在300克的前提下,应着重对穗行数和行粒数多的选择.更多还原

【Abstract】 The correlation between the yield and the ear-kernel structure of the 151summer corn hybrids in regional experiments shows the following feature.Am-ong ear-kernel characters of corn,1000 kernel weight plays an important role,when arerage yield per mu increases from 348 kg to 444 kg.The row number perear and kernel per row become more important,When average yield increases from444 kg to 497 kg.When the hybrids with a yield potential is above 500 kg permu,the correlation among row number per ear,kernel numbr per row andweight per 1000 kernels should be weli coordinated.更多还原