一个推广的水稻品种,在生产中表现整齐一致。这是品种遗传性的相对稳定性所决定。但是遗传性与变异性是共存于一个品种之中,是相辅相成的,是矛盾的对立统一体,是动态发展的。遗传的稳定性是相对的,而变异性则是绝对的。因此,在一个相对一致的品种群体中,也存在着变异的个体。所以,只要我们有目的地、准确地选择优良的个体(单株或单穗),定向培育,就有可能培育成新品种。 A popularized variety of rice that performs neatly in production. This is due to the relative stability of the heritability of the species. However, heredity and variability are coexistence in a variety, are complementary and contradictory opposites, is a dynamic development. Genetic stability is relative, while variability is absolute. Therefore, in a relatively consistent breed groups, there are also individuals who mutate. So, as long as we purposely and accurately select good individuals (single or single spike), we will cultivate new varieties if they are oriented.