性起源的传染机制。

The contagion mechanism for the origin of sex.

作者信息

Rose M R

出版信息

J Theor Biol. 1983 Mar 7;101(1):137-46. doi: 10.1016/0022-5193(83)90277-1.

Abstract

The origin of sex is one of the least understood aspects of the evolution of sex. Recently it has been proposed that sex arose as a result of a contagious genetic element which acted so as to foster its own transmission. Two continuous-time deterministic models of this mechanism are analysed. The first model lacks population regulation. With this assumption, sex is always established in the population, predominating if the sexual form is viable. The second model includes population regulation, giving rise to evolutionary dynamics in which sex need not be established in the population. In addition, with the second model, when the sexual form is viable, it need not fix. Thus, the contagion mechanism can give rise to sex, but need not do so.

摘要

性的起源是性别进化中最不为人所理解的方面之一。最近有人提出，性的出现是一种传染性遗传因素作用的结果，这种因素的作用是促进自身的传播。分析了该机制的两个连续时间确定性模型。第一个模型缺乏种群调节。基于这一假设，性在种群中总是会确立起来，如果有性形式是可行的，它就会占主导地位。第二个模型包括种群调节，从而产生了进化动态，在这种动态中，性在种群中不一定会确立起来。此外，对于第二个模型，当有性形式可行时，它不一定会固定下来。因此，传染机制可以导致性的产生，但不一定会这样。