The relative role of male vs. female mate choice in maintaining assortative pairing among discrete colour morphs
The relative role of male vs. female mate choice in maintaining assortative pairing among discrete colour morphs
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DOI：
10.1111/j.1420-9101.2007.01332.x
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发表时间：
2007-07-01
影响因子：
2.1
通讯作者：
Griffith, S. C.
中科院分区：
文献类型：
--
作者：
Pryke, S. R.;Griffith, S. C.
配偶选择具有重要的进化后果，因为它影响选型交配和种群内维持的遗传变异水平。在具有遗传决定的多态性的物种中，非随机的配偶选择可能会影响进化稳定性和替代表型的维持（或丧失）。我们研究了颜色多态胡锦雀（Erythrura gouldiae）的交配模式，以及雌性和雄性的配偶选择在维持三种不同的头部颜色（黑色、红色和黄色）方面的作用。在大量的圈养和野生种群中，胡锦雀的头部颜色搭配不同。在择偶试验中，雌性表现出对具有最复杂的性二态性特征（即更多彩色紫外线/蓝色羽毛和更长的针尾羽毛）的伴侣的强烈偏好，但并没有进行选型歧视。然而，出乎意料的是，雄性特别挑剔，只与自己形态的雌性交往和配对。尽管雌性配偶选择通常被认为是维持两性二色物种中明显的雄性颜色的主要选择力量，并且通常被认为驱动非随机交配，但这些发现表明，相互的择偶选择，特别是雄性择偶选择，是选择的一个重要但被忽视的组成部分。
Mate choice has important evolutionary consequences because it influences assortative mating and the level of genetic variation maintained within populations. In species with genetically determined polymorphisms, nonrandom mate choice may affect the evolutionary stability and maintenance (or loss) of alternative phenotypes. We examined the mating pattern in the colour polymorphic Gouldian finch (Erythrura gouldiae), and the role of mate choice, both female and male, in maintaining the three discrete head colours (black, red and yellow). In both large captive and wild populations, Gouldian finches paired assortatively with respect to head colour. in mate choice trials, females showed a strong preference for mates with the most elaborate sexually dimorphic traits (i.e. more chromatic UV/blue plumage and longer pin-tail feathers), but did not discriminate assortatively. Unexpectedly, however, males were particularly choosy, associating and pairing only with females of their own morph-type. Although female mate choice is generally invoked as the major selective force maintaining conspicuous male colouration in sexually dichromatic species, and is typically thought to drive nonrandom mating, these findings suggest that mutual mate choice and male mate choice in particular, are an important yet neglected component of selection.