种子质量的优劣直接影响水稻的产量和品质,水稻品种混杂退化将破坏原有品种的遗传平衡,导致品种群体的遗传组成向不利方向发展,缩短品种的使用寿命,严重影响其应有的经济效益和社会效益。而随着科技的发展、投入的增加,品种的育成速度明显加快,同时品种的使用寿命也相应缩短,基本上是一个 The quality of seeds directly affects the yield and quality of rice. The hybrid degeneration of rice varieties will undermine the genetic balance of the original varieties, resulting in the genetic composition of breed groups to unfavorable direction, shortening the service life of varieties, seriously affecting their economy Benefit and social benefit. With the development of science and technology, the increase of investment, the breed growth rate significantly accelerated, while the varieties of life is also shortened, basically a