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从四个方面分析了新品种混杂退化的原因,提出防杂保纯和防止退化的五项主要措施,来做好品种保纯工作,以保持品种的优良特性。
From four aspects, the reasons for the mixed degeneration of new varieties were analyzed. Five main measures of preventing hybrids and preventing degeneration were put forward, so as to maintain the good characteristics of varieties.