Charlat Sylvain, Hornett Emily A, Fullard James H, Davies Neil, Roderick George K, Wedell Nina, Hurst Gregory D D
Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE, UK.
Science. 2007 Jul 13;317(5835):214. doi: 10.1126/science.1143369.
The ratio of males to females in a species is often considered to be relatively constant, at least over ecological time. Hamilton noted that the spread of "selfish" sex ratio-distorting elements could be rapid and produce a switch to highly biased population sex ratios. Selection against a highly skewed sex ratio should promote the spread of mutations that suppress the sex ratio distortion. We show that in the butterfly Hypolimnas bolina the suppression of sex biases occurs extremely fast, with a switch from a 100:1 population sex ratio to 1:1 occurring in fewer than 10 generations.
一个物种中雄性与雌性的比例通常被认为是相对恒定的，至少在生态时间范围内是这样。汉密尔顿指出，“自私的”性别比例扭曲因素的传播可能很快，并导致种群性别比例转向高度失衡。对高度失衡的性别比例进行选择应该会促进抑制性别比例扭曲的突变的传播。我们发现，在波利娜袖蝶中，性别偏差的抑制极其迅速，在不到10代的时间里，种群性别比例就从100:1转变为1:1。
