Ancestral sex-role plasticity facilitates the evolution of same-sex sexual behavior.
Ancestral sex-role plasticity facilitates the evolution of same-sex sexual behavior.
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祖先的性能可塑性促进了同性性行为的演变。
DOI：
10.1073/pnas.2212401119
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发表时间：
2022-11-15
影响因子：
11.1
通讯作者：
中科院分区：
文献类型：
--
作者：
同性性行为（SSB）的进化是一个谜，因为这种行为不能直接导致繁殖。理论论文预测，不分青红皂白的交配是SSB的进化驱动因素，需要实证工作来验证这一假设。本研究表明，白蚁的同性配对不是通过不分青红皂白的交配来维持的，而是通过具有准确性别歧视的行为可塑性来维持的。雌白蚁和雄白蚁都能表达对方的行为，这有助于维持蚁对的协调。系统发育比较分析表明，这种行为灵活性是从祖先谱系遗传下来的。我们发现，SSB可以在高度精确的性别歧视和性别角色可塑性的结合下进化。最近试图解释同性性行为（SSB）的进化流行集中在不分青红皂白的交配的作用。然而，在许多情况下，SSB可能比简单的认错要复杂得多，而是涉及到能够识别彼此性别的伴侣之间的相互作用和成功配对。在这种情况下，行为可塑性对SSB的表达至关重要。为了验证行为可塑性在SSB进化中的作用，我们以白蚁为研究对象，研究了雌性和雄性在同性和异性恋配对中如何改变自己的行为。雄白蚁在交配前跟随雌白蚁结成“连队”，它们的行动模式是两性二态的。先前的研究发现，适应性的同性组合在两性中也会发生。本研究发现，稳定的同性伴侣关系是通过行为可塑性来实现的，当一方采用另一方的动作时，就会产生行为二态性。基于经验参数的模拟表明，这种社会暗示的可塑性有助于维持配对，因为二态运动提高了意外分离时的重聚成功率。系统的文献调查和系统发育比较分析表明，现代白蚁的祖先在配对过程中缺乏一致的性别角色，表明可塑性是从祖先遗传而来的。祖先行为潜能的社会环境诱导可能对SSB的表达具有广泛的重要性。我们的发现挑战了最近关于不加区分的交配行为在不同分类群中SSB的进化起源和维持中的突出作用的论点。
The evolution of same-sex sexual behavior (SSB) is an enigma because such behavior cannot directly result in reproduction. Theoretical papers predict that indiscriminate mating is an evolutionary driver of SSB, calling for empirical work to test this hypothesis. Here we show that same-sex pairing in termites is maintained not by indiscriminate mating but by behavioral plasticity with accurate sexual discrimination. Female and male termites can express the behavior of the other sex, which contributes to maintaining pair coordination. Phylogenetic comparative analysis suggests that such behavioral flexibility was inherited from an ancestral lineage. We show that SSB can evolve with highly accurate sex discrimination, combined with sex-role plasticity. Recent attempts to explain the evolutionary prevalence of same-sex sexual behavior (SSB) have focused on the role of indiscriminate mating. However, in many cases, SSB may be more complex than simple mistaken identity, instead involving mutual interactions and successful pairing between partners who can detect each other’s sex. Behavioral plasticity is essential for the expression of SSB in such circumstances. To test behavioral plasticity’s role in the evolution of SSB, we used termites to study how females and males modify their behavior in same-sex versus heterosexual pairs. Male termites follow females in paired “tandems” before mating, and movement patterns are sexually dimorphic. Previous studies observed that adaptive same-sex tandems also occur in both sexes. Here we found that stable same-sex tandems are achieved by behavioral plasticity when one partner adopts the other sex’s movements, resulting in behavioral dimorphism. Simulations based on empirically obtained parameters indicated that this socially cued plasticity contributes to pair maintenance, because dimorphic movements improve reunion success upon accidental separation. A systematic literature survey and phylogenetic comparative analysis suggest that the ancestors of modern termites lack consistent sex roles during pairing, indicating that plasticity is inherited from the ancestor. Socioenvironmental induction of ancestral behavioral potential may be of widespread importance to the expression of SSB. Our findings challenge recent arguments for a prominent role of indiscriminate mating behavior in the evolutionary origin and maintenance of SSB across diverse taxa.
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影响因子：
64.8
作者：
Karigo T;Kennedy A;Yang B;Liu M;Tai D;Wahle IA;Anderson DJ
通讯作者：
Anderson DJ
影响因子：
2.5
作者：
Bailey, Nathan W.;French, Nicholas
通讯作者：
French, Nicholas
影响因子：
2
作者：
Couzin, ID;Krause, J;Franks, NR
通讯作者：
Franks, NR
影响因子：
0.9
作者：
Kitade, O;Hayashi, Y;Kawarasaki, S
通讯作者：
Kawarasaki, S
DOI：
10.1088/1751-8113/42/43/434002
发表时间：
2009-10-30
影响因子：
2.1
作者：
Bartumeus, F.;Catalan, J.
通讯作者：
Catalan, J.