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水稻杂种优势的利用,是提高水稻产量的有效途径之一。然杂交水稻制种,则是目前获得杂合体水稻种子的唯一途径。随着杂交水稻种植面积的逐年扩
The utilization of rice heterosis is one of the effective ways to increase the yield of rice. However, hybrid rice seed production is the only way to obtain hybrid rice seeds. With the hybrid rice planting area expanded year by year