【摘要】 对1985和1986两年种植于河南省三个玉米生态区的10个夏玉米杂交种的7个穗粒性状进行了逐步回归和通径系数分析。在复决定系数R~2>0.85的情况下,得到了三个不同生态区高产玉米杂交种的穗粒结构特征;其结果和这三个生态区影响各穗粒性状发育的生态因子是吻合的。作者还针对这三个不同生态区玉米生产和育种目标提出了意见。更多还原

【Abstract】 Ite stepwise regression and path analysis were made to study 7 ear—kernecharacters of 10 summer corn hybrids in 3 corn ecological districts in Henanprovine in 1985 and 1986 In case of the multiple coefficient of determinationR~2>0.85,it coincides with the ecological factors affecting the ear—kernelcharacter straetures which were obtained from higher yielding hybrids growingin the 3 ecologiecal districts respeetivelyThe,corn production and breedtng obj-eetives in the 3 ecological districts were also discussed.更多还原