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近年来,我国水稻杂种优势利用的研究取得了很大成绩,一批强优组合已在南方13个省(市)大面积推广,对粮食增产起了重要作用。但是目前推广的籼稻组合还存在着生育期偏长、结实率不稳、父母本生育差期过大、不利于制种等问题。而且怎样进一步选育早、丰、抗、优的新组合,在理论和实践上都还没有很好解决。为了给选育杂交水稻新组合提供理论依据,我们进行了本项实验。
In recent years, great achievements have been made in researches on utilization of rice heterosis in our country. A group of high-quality combination has been widely popularized in 13 provinces (cities) in the south, which has played an important role in increasing grain output. However, the current indica rice combination still has some problems such as long growth period, unstable fruiting rate, excessive growth period of parents, which is not conducive to seed production. And how to further breed the new combination of early, abundance, resistance and excellence has not been well solved both theoretically and practically. In order to provide a theoretical basis for new combinations of hybrid rice, we conducted this experiment.