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植物杂种及其杂种优势的研究与利用，已在实际生产上获得了巨大的经济效益。我国已一跃成为世界上第一个成功地利用水稻杂种优势的国家；我国杂种油菜，无论是在各类雄性不育系的选育方面，还是在三系杂种的实际应用方面均已居于世界前列。目前，我国人口剧增，耕地却在逐年减
Plant hybrids and their heterosis research and utilization, has been in the actual production of a huge economic benefits. Our country has become the first country in the world to successfully utilize the heterosis of rice. Our hybrid rape has been in the world both in the breeding of various male sterile lines and in the practical application of three-line hybrids Forefront. At present, the population in our country is increasing rapidly while the cultivated land is decreasing year by year