演化速率假说的实验验证研究进展

褚晓琳, 张全国

A review of experimental evidence for the evolutionary speed hypothesis

Chu Xiaolin, Zhang Quanguo

图3 高温增强选择作用示意图(改自Chu等(2020))。虚线代表祖先型菌株的适合度所在位置; 红线代表高温下的有利突变的适合度频率分布; 蓝线代表低温下的有利突变适合度频率分布。(a)高温通过增加有利突变的数量增强选择作用, (b)高温通过提高有利突变适合度后果增强选择作用。

Fig. 3 A diagram of the enhancement of selection by high temperature (Adapted by Chu et al (2020)). The vertical dashed line in each panel indicates the fitness of the wild type; red and blue lines represent the frequency distribution of fitness effects of beneficial mutations at high and low temperature, respectively. (a) High temperature increases the strength of selection by increasing the amount of beneficial mutations. (b) High temperature increases the strength of selection by enhancing the fitness effects of beneficial mutations.