EVOLUTION UNDER RELAXED SEXUAL CONFLICT IN THE BULB MITE RHIZOGLYPHUS ROBINI
EVOLUTION UNDER RELAXED SEXUAL CONFLICT IN THE BULB MITE RHIZOGLYPHUS ROBINI
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球螨Rhizoglyphus Robini在轻松的性冲突下的进化
DOI：
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发表时间：
2006
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影响因子：
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通讯作者：
J. Radwan
中科院分区：
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作者：
Magdalena Tilszer;Kinga Antoszczyk;Natalia Sałek;E. Zając;J. Radwan
摘要在不同水平的性冲突下的实验进化已经被用来证明蝇类的对抗性协同进化，但在其他类群中还没有采用类似的方法。在这里，我们描述了37代的进化结果，无论是实验强制一夫一妻制或一夫多妻制的灯泡螨Rhizoglyphus robini。每个处理保持三个重复。一夫一妻制使男性和女性的利益一致;因此，选择有望减少男性对其伴侣的伤害。我们的研究结果与这一预测是一致的，从一夫一妻制的女性实现较低的生育力时，与男性从一夫多妻制的线。一夫多妻雌虫的生殖力不受其配偶进化的交配制度的影响，这表明它们对雄性诱导的伤害具有更强的抵抗力。正如拮抗协同进化假说所预测的那样，一夫一妻制雄性的危害性下降伴随着生殖竞争力的下降。与此相反，女性生殖力和胚胎活力，预计不会与男性的危害性，没有一夫一妻制和一夫多妻制的线路之间的差异。没有健身组件测定不同的个体之间的杂交从父母之间从同一行和那些从父母之间的杂交从不同的行在同一交配系统。这表明近交衰退并没有混淆我们的结果。然而，我们的结果的解释是复杂的事实，无论是男性和女性从一夫一妻制的线进化较小的身体尺寸相比，个人从一夫多妻制的线。虽然从一夫一妻制的男性生殖性能的下降仍然是显着的，当考虑到身体的大小，我们不能分开的影响，男性的身体大小和交配系统的影响，他们的女性伴侣的生殖力。
Abstract The experimental evolution under different levels of sexual conflict have been used to demonstrate antagonistic coevolution in muscids, but among other taxa a similar approach has not been employed. Here, we describe the results of 37 generations of evolution under either experimentally enforced monogamy or polygamy in the bulb mite Rhizoglyphus robini. Three replicates were maintained for each treatment. Monogamy makes male and female interests congruent; thus selection is expected to decrease harmfulness of males to their partners. Our results were consistent with this prediction in that females from monogamous lines achieved lower fecundity when housed with males from polygamous lines. Fecundity of polygamous females was not affected by mating system under which their partners evolved, which suggests that they were more resistant to male-induced harm. As predicted by the antagonistic coevolution hypothesis, the decrease in harmfulness of monogamous males was accompanied by a decline in reproductive competitiveness. In contrast, female fecundity and embryonic viability, which were not expected to be correlated with male harmfulness, did not differ between monogamous and polygamous lines. None of the fitness components assayed differed between individuals obtained from crosses between parents from the same line and those obtained from crosses between parents from different lines within the same mating system. This indicates that inbreeding depression did not confound our results. However, interpretation of our results is complicated by the fact that both males and females from monogamous lines evolved smaller body size compared to individuals from polygamous lines. Although a decrease in reproductive performance of males from monogamous lines was still significant when body size was taken into account, we were not able to separate the effects of male body size and mating system in their influence on fecundity of their female partners.