Sexual signal loss in field crickets maintained despite strong sexual selection favoring singing males
Sexual signal loss in field crickets maintained despite strong sexual selection favoring singing males
复制标题
尽管强烈的性选择有利于唱歌的雄性，但田间蟋蟀的性信号丢失仍然存在
DOI：
10.1111/evo.13761
复制
发表时间：
2019
期刊：
影响因子：
3.3
通讯作者：
Zuk, Marlene
中科院分区：
文献类型：
--
作者：
Tanner, Jessie C.;Swanger, Elizabeth;Zuk, Marlene
进化生物学家通常寻求解释选择如何驱动新特征的出现。虽然性状丧失也经常发生，但当代的例子很少。在夏威夷，太平洋蟋蟀（Teleogryllus oceanicus）正在经历适应性的性信号的损失，由于自然选择所施加的窃听寄生虫。突变的雄性蟋蟀（“平翅”）不能唱歌。我们测量了在野生种群中翅表型的性选择强度。首先，我们调查了平翅和“正常翼”（非突变体）的相对丰度。然后，我们繁殖野生交配的雌性后代，以确定雌性基因型相对于平翅突变和平翅雄性的比例，他们的后代。我们发现了强烈的性选择有利于生产的歌曲的证据：女性主要是纯合子正常翼，他们的后代不成比例的父亲唱歌的男性，并在人口水平上，flatwing男性变得不太常见的单一性选择事件。我们报告的选择系数描述总（前和交配后）的性选择有利于正常翼男性的性质。考虑到近年来在夏威夷维持平翅表型，这种实质性的性选择另外表明了反对自然选择的近似力量，有利于沉默的男性。
Evolutionary biologists commonly seek explanations for how selection drives the emergence of novel traits. Although trait loss is also predicted to occur frequently, few contemporary examples exist. In Hawaii, the Pacific field cricket (Teleogryllus oceanicus) is undergoing adaptive sexual signal loss due to natural selection imposed by eavesdropping parasitoids. Mutant male crickets (“flatwings”) cannot sing. We measured the intensity of sexual selection on wing phenotype in a wild population. First, we surveyed the relative abundance of flatwings and “normal-wings” (nonmutants) on Oahu. Then, we bred wild-mated females’ offspring to determine both female genotype with respect to the flatwing mutation and the proportion of flatwing males that sired their offspring. We found evidence of strong sexual selection favoring the production of song: females were predominantly homozygous normal-wing, their offspring were sired disproportionately by singing males, and at the population level, flatwing males became less common following a single sexual selection event. We report a selection coefficient describing the total (pre- and postcopulatory) sexual selection favoring normal-wing males in nature. Given the maintenance of the flatwing phenotype in Hawaii in recent years, this substantial sexual selection additionally suggests an approximate strength of opposing natural selection that favors silent males.
登录
查看更多内容
在快速进化的蟋蟀种群中，绝对沉默的雄性比歌手生育更多的后代
影响因子：
3.3
作者：
Justa L. Heinen‐Kay;Ellen M. Urquhart;M. Zuk
通讯作者：
M. Zuk
影响因子：
56.9
作者：
ROBERT, D;AMOROSO, J;HOY, RR
通讯作者：
HOY, RR
影响因子：
16.8
作者：
A. Burt
通讯作者：
A. Burt
影响因子：
2.9
作者：
Tinghitella, Robin M.;Broder, E. Dale;Wilson, Jacob D.
通讯作者：
Wilson, Jacob D.
卫星男性是专性的，但不是兼性的，更喜欢与女性相同的男性性信号特征
影响因子：
2.5
作者：
Rachel Olzer;M. Zuk
通讯作者：
M. Zuk