【摘要】 本文用简单相关和通径分析的方法,研究了玉米双列杂交组中的31个组合的7个性状与单株产量间的关系.结果表明:穗长和百粒重对单株产量相关显著,并且直接作用大;穗粗和生育期也有较大的直接作用.同时,还指明在黑龙江省条件下,选育玉米杂交种应是熟期适中、灌浆速度快、果穗较长、百粒重较高和果穗较粗的类型.更多还原

【Abstract】 Relationships between seven corn yield characters and plant yield were studied among 31 combinations derived from diallel crosses by means of simple correlation and path-coefficient analysis. Results showed that correlations between ear length, hundred grain weight and plant yield were significant with positive direct effect; Direct effect between ear diameter, maturity and plant yield is greater. It is sugested that corn breeders should pay more attention to select hybrids with moderate maturity, rapid filling longer ear,higher hundred grain weight and wider ear diameter in Heilongjiang province.更多还原