Wigby S, Chapman T
Department of Biology, University College London, Darwin Building, London, UK.
J Evol Biol. 2006 Jul;19(4):1033-9. doi: 10.1111/j.1420-9101.2006.01107.x.
Theoretical models predict that sexual conflict can drive reproductive isolation by decreasing the probability of matings between individuals from allopatric populations. A recent study in dung flies supported this prediction. To test the generality of this finding we used replicate lines of Drosophila melanogaster that had been selected under high, medium and low levels of sexual conflict, in which the females had evolved differences in their level of resistance to male-induced harm. We compared the proportion of virgin pairs that mated by set time points, for flies from the same replicate within each sexual conflict level vs. flies from different replicates within each sexual conflict level. The results did not support the prediction that, in D. melanogaster, sexual conflict drives population divergence via changes in female willingness to mate. The results were unlikely to be explained by differential inbreeding or by a lack of response to sexual conflict.
理论模型预测，性冲突可通过降低异域种群个体之间交配的概率来推动生殖隔离。最近一项对粪蝇的研究支持了这一预测。为了检验这一发现的普遍性，我们使用了在高、中、低性冲突水平下进行选择的黑腹果蝇重复品系，其中雌性在对雄性造成伤害的抗性水平上发生了进化差异。我们比较了在每个性冲突水平内来自相同重复品系的果蝇与来自不同重复品系的果蝇在设定时间点交配的处女蝇对比例。结果并不支持性冲突通过雌性交配意愿的变化推动黑腹果蝇种群分化的预测。这些结果不太可能用不同的近亲繁殖或对性冲突缺乏反应来解释。
