The evolution of preference strength under sensory bias: a role for indirect selection?

The evolution of preference strength under sensory bias: a role for indirect selection?
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DOI:
10.1002/ece3.273
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发表时间:
2012-07
影响因子:
2.6
通讯作者:
Servedio, Maria R.
Servedio, Maria R.
中科院分区:
生物学2区
文献类型:
--
作者:
Frame, Alicia M.;Servedio, Maria R.

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有证据表明,女性的偏好有时可能是通过感官偏见而产生的,男性可能会随后进化出一些特征,这些特征增加了他们对女性的吸引力。在这里,我们问是否间接选择,通过遗传协会(连锁不平衡)在性选择的感官偏见施加,可以影响自己的偏好强度的演变。具体而言,我们使用人口遗传模型来考虑是否修改的偏好强度可以在不同的生态条件下传播时,女性择偶是由感官偏见。我们专注于男性的特征,使男性在某些栖息地更显眼,从而更明显的捕食者和更有吸引力的女性和检查修饰语的优势,显眼的男性。我们首先解决的传播速度的修改器,加强在环境均匀的人口的偏好,我们说明,这种传播将是非常缓慢的。其次,我们使用了一系列的模拟考虑的作用,栖息地的结构和运动的偏好强度的修改器的演变,男性颜色多态性作为案例研究。我们发现,在大多数情况下,间接选择不允许进化出更强或更弱的感官偏好。只有在“两岛”模型中,在不同的补丁之间有限制的迁移,有利于不同的男性表型,我们发现,偏好的强度可以演变。间接选择在感觉偏差进化中的作用特别令人感兴趣,因为正在进行的关于感觉偏差在生殖隔离进化中的作用的推测。
Evidence suggests that female preferences may sometimes arise through sensory bias, and that males may subsequently evolve traits that increase their conspicuousness to females. Here, we ask whether indirect selection, arising through genetic associations (linkage disequilibrium) during the sexual selection that sensory bias imposes, can itself influence the evolution of preference strength. Specifically, we use population genetic models to consider whether or not modifiers of preference strength can spread under different ecological conditions when female mate choice is driven by sensory bias. We focus on male traits that make a male more conspicuous in certain habitats—and thus both more visible to predators and more attractive to females—and examine modifiers of the strength of preference for conspicuous males. We first solve for the rate of spread of a modifier that strengthens preference within an environmentally uniform population; we illustrate that this spread will be extremely slow. Second, we used a series of simulations to consider the role of habitat structure and movement on the evolution of a modifier of preference strength, using male color polymorphisms as a case study. We find that in most cases, indirect selection does not allow the evolution of stronger or weaker preferences for sensory bias. Only in a “two-island” model, where there is restricted migration between different patches that favor different male phenotypes, did we find that preference strength could evolve. The role of indirect selection in the evolution of sensory bias is of particular interest because of ongoing speculation regarding the role of sensory bias in the evolution of reproductive isolation.
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