Experimental removal of sexual selection reverses intersexual antagonistic coevolution and removes a reproductive load
Experimental removal of sexual selection reverses intersexual antagonistic coevolution and removes a reproductive load
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DOI：
10.1073/pnas.96.9.5083
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发表时间：
1999-04-27
影响因子：
11.1
通讯作者：
Rice, WR
中科院分区：
文献类型：
--
作者：
Holland, B;Rice, WR
虽然性选择对两性都有好处，但也可能因为增加了性间冲突的机会而付出代价。我们评估了性选择在一个自然滥交的物种，黑腹果蝇的作用。在两个重复的人口，性选择被删除，通过强制一夫一妻制交配随机交配分配或保留在滥交控制。一夫一妻制的交配限制了配偶的繁殖成功率，从而将配偶之间先前的冲突转化为互惠互利的机会。随机的配偶分配剥夺了雌性选择配偶有益品质的机会。交配处理维持47代，并允许进化在设计参数内自然进行。在一夫一妻制的种群中，雄性进化得对配偶的伤害更小，雌性进化得对雄性引起的伤害抵抗力更小。一夫一妻制种群还进化出比滥交对照更大的净生殖率。这些结果表明，滥交所固有的冲突造成的性选择的潜在广泛的成本。
Although sexual selection can provide benefits to both sexes, it also can be costly because of expanded opportunities for intersexual conflict. We evaluated the role of sexual selection in a naturally promiscuous species, Drosophila melanogaster. In two replicate populations, sexual selection was removed through enforced monogamous mating with random mate assignment or retained in promiscuous controls. Monogamous mating constrains the reproductive success of mates to be identical, thereby converting prior conflicts between mates into opportunities for mutualism. Random mate assignment removes the opportunity for females to choose beneficial qualities in their mate. The mating treatments were maintained for 47 generations, and evolution was allowed to proceed naturally within the parameters of the design. In the monogamous populations, males evolved to be less harmful to their mates, and females evolved to be less resistant to male-induced harm. The monogamous populations also evolved a greater net reproductive rate than their promiscuous controls. These results indicate a potentially widespread cost of sexual selection caused by conflicts inherent to promiscuity.