非达尔文自然选择—一种新的进化动力

本文从作者之一于１９９１年提出的基因表达的诱导和阻遏效应的数学模型中引出一种新的生物进化动力假说，即环境因素对基因表达的选择。此种选择机制在选择对象，选择水平和选择效应等方面都不同于达尔文提出的自然选择。所以称为非达尔文自然选择。它的理论依据是一个物种所含有的遗传信息量远远大于其整个形态结构所表现的遗传信息量以及基因表达的操纵子诱导和阻遏模型。本文认为一个祖先种的基因库可能含有许多可选择的基因表达系统，且基因库容量越大，就越有可能存在有序度越高的基因表达系统内形成有序度越高的形态结构。此外，本文还提出了绝对遗传型和相对遗传型概念，讨论了非达尔文自然选择与达尔文自然选择及中性进化的关系。

NO-DARWEN NATURAL SELECTION-A NEW EVOLU TION FORCE

new evolution force hypothesis which environmental factors select gene expression has been drawn from the mathematic model of inducement and repression of gene expression given by one of writers in the article in 1991.The selection mechanism is different from natural selecting by Darwen in selection targets,revel,effect and so on. For this,this selection is called no-Darwen natural selection,which theorical basis is that genetic information content of gene pool in a species is far more than that of its overall morpha and structure,and the control model of inducement and repression of gene expression. We believe that the gene pool in an ancestor species might have many selected systems or gene expression,and the larger gene pool content is,the more probability more orderly system of gene expression that produces more orderly morpha and structure exists. In the article,the conceptions of absolute heredity and relative heredity types were given,and the relationships of no-Darwen natural selection with Darwen natural selection and neutroselection were discussed.