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变异～选择～隔离作为生物进化的机理,为人类有计划、有目的选种奠定了科学的基础。 其中,选择既为变化和机遇指出了方向,又是甜菜进化的动力。所以,其作用和效果就不完全象一般所认为的,仅仅作为一个筛子,去掉有害的突变,繁殖有益的突变。而更为重要的作用就在于提高群体中有利基因的频率和增强基因的累加效应,产生更为复杂的遗传结构,以便仔细调整其功能,形成在适应上相互配合,性状上能满足人类要求的新类型。同时,采用不同的选择方法将会产生不同的效果。
Mutation ~ selection ~ isolation as the mechanism of biological evolution, laid the scientific foundation for the planned and purposeful selection of human beings. Among them, the choice not only pointed out the direction of change and opportunity, but also the driving force of beet evolution. Therefore, its role and effect are not completely as generally believed, just as a sieve, remove harmful mutations, reproductive beneficial mutation. The more important role is to increase the frequency of favorable genes in the population and to enhance the additive effect of the genes to produce more complex genetic structures that allow them to carefully adjust their functions to form products that meet the human requirements adaptively and traditionally New type At the same time, using different methods of selection will produce different effects.