杂交水稻刚刚问世,曾有人断言:“水稻是自花授粉作物;花粉少,开花时间短,柱头小,‘异花传粉结实率低,肯定过不了制种关。即使杂交稻优势再强,也不可能在生产上应用。”在杂交稻发展的初期,制种产量确实不高,除了上述原因之外,更主要的是不育系包颈严重,一亩产量只几公斤,种植不 Hybrid rice has just come out, it has been asserted: "Rice is self-pollinating crops; less pollen, flowering time is short, small stigma, ’cross-pollination seed setting rate is low, certainly can not pass the seed. In the early development of hybrid rice, seed production is indeed not high, in addition to the above reasons, the more important is sterile line neck serious, only a few acres yield per mu, planting is not