杂交水稻的混杂退化是当前杂交稻生产上一个急待解决的问题。近年来,各地对防杂提纯方法做了大量研究工作,提出了“一杂四圃”、“配套提纯”、和“三系七圃常规提纯”等各种防杂提纯措施,在理论上形成了两种截然不同的意见。一种认为杂交稻和三系的混杂退化是普遍存在的,同一亲本不同株系配制的杂种,产量差异极显著,株系间平均表现差异亦极显著且同一亲本不同株系闯相互遗传关系具有一定的特殊性和专 The hybrid degeneration of hybrid rice is an urgent problem to be solved in the current hybrid rice production. In recent years, various methods of anti-impurity purification have done a lot of research work, put forward a “mixed with four nurseries,” “supporting the purification,” and “three series of seven conventional purification” and other anti-purification measures in theory to form Two completely different opinions. One of the hybrid rice and three lines that hybrid degeneracy is ubiquitous, hybrids formulated with different strains of the same parent, the yield was extremely significant difference between the average performance of the strains is also very significant and the same parent different strains Chuang mutual genetic relationship with A certain degree of specificity and expertise