A courtship behavior that makes monandrous females polyandrous
A courtship behavior that makes monandrous females polyandrous
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一种使多夫多妻的女性一妻多夫的求爱行为
DOI：
10.1111/evo.14098
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发表时间：
2020
期刊：
影响因子：
3.3
通讯作者：
Takashi Matsuo
中科院分区：
文献类型：
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作者：
Kazuyoshi Minekawa;Kai Amino;Takashi Matsuo
许多动物物种的雌性与不同的雄性交配多次（一妻多夫制），而一些物种的雌性只与一个雄性交配一次（一妻多夫制）。人们对这些不同的交配系统进化的机制知之甚少。与黑腹果蝇不同，雌性在第一次交配后数天内拒绝交配（交配抑制[RS]）。然而，有趣的是，非处女。雌性拒绝与被禁止执行其物种特有的求偶行为——腿部振动（LV）的雄性交配，这表明LV凌驾于RS之上，使其成为神秘的长尾雌性。在这项研究中，我们研究了这种隐性RS持续多久。令人惊讶的是，它持续了至少2周，这表明RS与fd相比显著增加了ind的延长时间。腹。两个最接近的物种是d。长尾果蝇（prolongata）、罗氏果蝇（Drosophila rhopaloaandDrosophila carrolli）不进行左心室活动，而是表现出增强的左心室活动，这支持了增强的左心室活动可能在左心室获得之前就已经进化的观点。这些结果表明d。长寿的雌性本质上是一夫一妻制，而新进化的求爱行为使它们成为一妻多夫制。这是一个罕见的案例，其中一妻多夫制进化的近似机制被证明。
Females of many animal species mate several times with different males (polyandry), whereas females of some species mate with a single male (monandry) only once. Little is known about the mechanisms by which these different mating systems evolve. Females ofDrosophila prolongatamate serially, unlikeDrosophila melanogasterfemales that refuse to remate for several days after their first mating (remating suppression [RS]). Nevertheless, interestingly, nonvirginD. prolongatafemales refuse to remate with males that are prohibited from performing their species-specific courtship behavior, leg vibration (LV), suggesting that LV overrides RS making it cryptic inD. prolongata. In this study, we examined how long this cryptic RS persists. Surprisingly, it was sustained for at least 2 weeks, showing that RS is substantially augmented inD. prolongatacompared to that ofD. melanogaster. The two most closely related species toD. prolongata,Drosophila rhopaloaandDrosophila carrolli, do not perform LV and showed augmented RS, supporting the idea that augmented RS could have evolved before LV was acquired. These results suggested thatD. prolongatafemales are intrinsically monandrous, whereas the newly evolved courtship behavior makes them polyandrous. This is a rare case in which a proximate mechanism of polyandry evolution from monandry is demonstrated.