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目前生产上的籼型杂交水稻,生育期偏长。在桂中桂北早季栽培,往往影响晚季适时栽插,以致抽穗扬花遭寒露风危害;再者,恢复系和不育系生育期相差较大,制种时调节花期困难。因此,选育早熟恢复系应予重视。但杂种一代生育期缩短后,经济性状优势是否随之降低?就此做了一些试验。
At present, the indica hybrid rice in production has a long growth period. The cultivation of Gui-Zhong and Gui-Bei in the early season usually affects the timely planting of the late-season, so that the flowering and cold-blooming of the heading and flowering are endangered. In addition, there is a big difference between the restoring and the sterile lines. Therefore, breeding early restorer should pay attention. However, the hybrid generation shortened growth period, the advantages of economic traits will be reduced? To do some experiments on this.