同域物种形成：符合单一基因型的表型多样化。
Sympatric speciation: compliance with phenotype diversification from a single genotype.
作者信息
Kaneko K, Yomo T
机构信息
Department of Pure and Applied Sciences, University of Tokyo, Komaba, Japan.
出版信息
Proc Biol Sci. 2000 Dec 7;267(1460):2367-73. doi: 10.1098/rspb.2000.1293.
Abstract
A novel mechanism for sympatric speciation that takes into account complex bioprocesses within each individual organism is proposed. According to dynamical systems theory, organisms with identical genotypes can possess differentiated physiological states and may coexist 'symbiotically' through appropriate mutual interaction. With mutations, the phenotypically differentiated organisms gradually come to possess distinct genotypes while maintaining their symbiotic relationship. This symbiotic speciation is robust against sexual recombination, because offspring of mixed parentage with intermediate genotypes are less fit than their parents. This leads to sterility of the hybrid. Accordingly, a basis for mating preference also arises.
摘要
提出了一种新的同域物种形成机制，该机制考虑了每个生物体内部复杂的生物过程。根据动力系统理论，具有相同基因型的生物体可以拥有不同的生理状态，并可能通过适当的相互作用“共生”共存。随着突变的发生，表型分化的生物体在维持共生关系的同时逐渐拥有不同的基因型。这种共生物种形成对有性重组具有抗性，因为具有中间基因型的混合亲本的后代比其亲本适应性更差。这导致杂种不育。因此，交配偏好的基础也随之产生。
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