Odor preferences in hybrid chickadees: implications for reproductive isolation and asymmetric introgression
Odor preferences in hybrid chickadees: implications for reproductive isolation and asymmetric introgression
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杂交山雀的气味偏好：对生殖隔离和不对称基因渗入的影响
DOI：
10.1007/s00265-021-03069-2
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发表时间：
2021
影响因子：
2.3
通讯作者：
Rice, Amber M.
中科院分区：
文献类型：
--
作者：
Van Huynh, Alex;Rice, Amber M.
在自然杂交区，对交配线索的偏好对物种形成有重要影响。虽然亲本物种的交配偏好得到了很好的研究，杂交偏好的线索，亲本物种受到较少的关注。然而，混合的偏好有潜在的重要后果生殖隔离和模式的渗入。在这里，我们测试的喜好，野生杂交山雀的气味线索从父母的物种，黑帽和卡罗莱纳山雀。嗅觉在鸟类，尤其是雀形目鸟类中一直被研究得不够，但最近的研究已经开始显示嗅觉线索在鸣禽生态学中的重要作用。与我们以前在纯种山雀中发现的强烈同种气味偏好相反，雄性杂交山雀作为一个群体对任何一种亲本的气味都没有偏好，但仍然表现出个体的偏好。雌性杂交种表现出对黑顶气味的偏好，但这种特征是由黑顶血统比例较高的个体驱动的，而像马琳娜一样的雌性杂交种则没有偏好。我们讨论的影响，缺乏一些女性的混合偏好生殖隔离，和潜在的不对称偏好在男性和黑帽样女性的混合有助于定向渗入和向北移动的混合区。Significance statementMate偏好有重要的影响自然杂交区的命运和物种形成过程。纯种个体对杂交种的交配歧视现象在杂交区是普遍存在的。然而，杂交个体对亲本物种的配偶偏好也同样重要。我们以前发现，混合区黑帽和卡罗莱纳山雀产生不同的气味配置文件，并显示出明确的偏好同种气味线索。在这里，我们评估的偏好野生杂交山雀的两个亲本物种的气味。与纯种鸟类相比，杂交雄性总体上没有表现出任何偏好的父母物种的气味作为一个群体。尽管如此，个别男性确实表现出明显的偏好。杂交雌性显示出对黑顶气味的偏好，这取决于它们自己的黑顶祖先程度。像蜘蛛一样的杂交雌性没有表现出偏好。我们的研究结果表明，潜在的混合偏好，有助于繁殖隔离和北移的山雀杂交区。
AbstractPreferences for mating cues can have important effects on speciation in natural hybrid zones. While mating preferences of parental species are well studied, hybrid preferences for cues of parental species have received less attention. Nevertheless, hybrid preferences have potentially important consequences for reproductive isolation and patterns of introgression. Here, we test preferences in wild-caught hybrid chickadees for odor cues from the parental species, black-capped and Carolina chickadees. Olfaction has been historically understudied in avian species, especially passerines, but much recent work has begun to show how olfactory cues play important roles in songbird ecology. In contrast to the strong conspecific odor preferences we previously found in pure-species chickadees, male hybrids as a group show no preference for the odor of either parental species, while still exhibiting individual instances of preference. Female hybrids show preferences for black-capped odor, but this signature is driven by individuals with elevated proportions of black-capped ancestry while Carolina-like female hybrids show no preferences. We discuss the implications of a lack of some female hybrid preferences on reproductive isolation, and the potential for asymmetric preferences in male and black-capped-like female hybrids to contribute to directional introgression and northward movement of the hybrid zone.Significance statementMate preference has important implications for the fate of natural hybrid zones and the speciation process. Mating discrimination by pure species individuals against hybrids is commonly observed in hybrid zones. However, mate preferences of hybrid individuals for the parental species can be just as important. We previously found that hybrid zone black-capped and Carolina chickadees produce distinct odor profiles and show clear preferences for conspecific odor cues. Here, we assessed preferences of wild-caught hybrid chickadees for the odors of both parental species. In contrast to pure-species birds, hybrid males overall show no preference for either parental species odor as a group. Still, individual males do show clear preferences. Hybrid females show a preference for black-capped odor that is dependent on their own degree of black-capped ancestry. Carolina-like hybrid females show no preferences. Our results suggest the potential for hybrid preference to contribute to reproductive isolation and northward movement of the chickadee hybrid zone.
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影响因子：
2.1
作者：
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