The effect of sex on the mean and variance of fitness in facultatively sexual rotifers
The effect of sex on the mean and variance of fitness in facultatively sexual rotifers
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DOI：
10.1111/j.1420-9101.2010.02199.x
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发表时间：
2011-03-01
影响因子：
2.1
通讯作者：
Agrawal, A. F.
中科院分区：
文献类型：
--
作者：
Becks, L.;Agrawal, A. F.
性的进化是进化生物学中的一个经典问题。虽然这一主题一直是许多理论工作的重点，但经验数据严重缺乏。一个简单而又基本的问题是，性别如何影响适应度的均值和方差。尽管它的重要性的理论，这种类型的数据是可用于只有少数类群。在这里，我们报告了两个实验中，我们测量的平均值和方差健身的单殖体轮虫，萼花臂尾轮虫性别的影响。与无性繁殖后代相比，有性繁殖后代具有更低的平均适应度和更小的适应度遗传方差。这些结果表明，至少在实验室中，有性生殖存在短期和长期的不利因素。我们简要回顾了其他可用的数据，并强调了未来工作的必要性。
The evolution of sex is a classic problem in evolutionary biology. While this topic has been the focus of much theoretical work, there is a serious dearth of empirical data. A simple yet fundamental question is how sex affects the mean and variance in fitness. Despite its importance to the theory, this type of data is available for only a handful of taxa. Here, we report two experiments in which we measure the effect of sex on the mean and variance in fitness in the monogonont rotifer, Brachionus calyciflorus. Compared to asexually derived offspring, we find that sexual offspring have lower mean fitness and less genetic variance in fitness. These results indicate that, at least in the laboratory, there are both short- and long-term disadvantages associated with sexual reproduction. We briefly review the other available data and highlight the need for future work.