An adaptive radiation model for the origin of new gene functions

被引：141

作者：

Francino, MP

机构：

[1] Lawrence Berkeley Natl Lab, DOE Joint Genome Inst, Evolutionary Genom Dept, Walnut Creek, CA 94598 USA

[2] Lawrence Berkeley Natl Lab, Genom Div, Walnut Creek, CA USA

来源：

NATURE GENETICS | 2005年 / 37卷 / 06期

关键词：

D O I：

10.1038/ng1579

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Current models for the evolution of new gene functions after gene duplication presume that the duplication events themselves have no effect on fitness. But those duplications that result in new gene functions are likely to be positively selected from their inception. The evolution of new function may start with the amplification of an existing gene with some level of preadaptation for that function, followed by a period of competitive evolution among the gene copies, resulting in the preservation of the most effective variant and the 'pseudogenization' and eventual loss of the rest.

引用

页码：573 / 577

页数：5

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