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1 关于品种退化的两种论说农作物品种退化,是种子工作中受到普遍关注的问题。关于品种退化,曾有两种论说:第一种认为品种退化是生活力逐渐衰退的结果。是矛盾趋于减小的原因,因此,主张用人工铺助授粉,异地换种等方法,来提高种子生活力。达到防止品种退化的目的。第二种认为品种退化是品种对环境条件的一种适应性。是自然选择作用的结果。是有生命的品种的一种必然的自然现象。人类可以延缓品种退化过程。延长品种利用时间。主要加强人工选择,搞好良繁体系,改善栽培条件,做好品种管理工作。
1 Two Delusions about Variety Degradation of crop varieties is a matter of universal concern in seed work. On the degradation of species, there have been two arguments: the first species that degradation is the result of a gradual decline in viability. Contradictions tend to reduce the reason, therefore, advocate artificial grants pollination, changing places and other methods to improve seed viability. Achieve the purpose of preventing the degeneration of varieties. The second species that is degradation of varieties is a kind of adaptability to environmental conditions. Is the result of natural selection. It is a necessary natural phenomenon of living species. Humans can delay the degradation process. Extend the variety of use of time. Mainly strengthen the manual selection, improve the good propagation system, improve the cultivation conditions, good varieties management.