摘要
1986—1988年对四个杂交粳稻组合F_1和F_2的产量及其主要经济性状进行了研究,结果表明:四个组合的F_2和F_1在产量及主要经济性状上的表现基本一致,F_2、不产生育性分离,株高和抽穗期分离不大,基本上是整齐的,充分说明这几个组合的F_2是可以利用的.还阐明了利用F_2组合应具备的几种条件以及应采取的栽培措施.
The yield and main economic characters of F1 and F2 of 4 combinations of keng rice hybrid were investigated in 1986 -1988. The results indicated that the yields ana main economic characters of F1 and F2 were :lose, fertility segregation did not occur in the hybrid F2, and the segregation of its plant hei ght and heading stage were negligible. That showed that the hybrid F2 of these 4 combinations was utilizable. However the employed combination of hybrid F2 was conditioned by:(l)The male sterile line employed must be gametophytic sterility;(2) The combination is possessed of strong heterosis;(3) The plant height and heading stage of the parents should be same or close;(4) The suitable cultivation techniques should be adopted, such as to add transplanting density and to give more effective management in the tilleringstage, for increasing the panicles per unit area.
出处
《华北农学报》
CSCD
北大核心
1989年第S1期1-7,共7页
Acta Agriculturae Boreali-Sinica
关键词
杂交粳稻
杂种二代
Keng hybrid rice F_2 hybrid