Asymmetric reinforcement in Lucania killifish: assessing reproductive isolation when both sexes choose.
Asymmetric reinforcement in Lucania killifish: assessing reproductive isolation when both sexes choose.
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DOI：
10.1093/cz/zoaa049
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发表时间：
2021-04
期刊：
影响因子：
2.2
通讯作者：
Fuller RC
中科院分区：
文献类型：
--
作者：
St John ME;Fuller RC
当同域中的适应不良杂交有利于同种偏好的进化和促进行为隔离（BI）的目标特征时，就会发生强化。在许多系统中，增强的BI是由于女性对同种的偏好增加。在其他系统中，BI是由男性偏好驱动的，而在其他系统中，两性都发挥偏好。其中一些模式可以归因于典型的性别特定成本和偏好收益。或者，同种偏好的性别差异可能是由于不对称的合子后隔离（例如，来自雌性A ×雄性B的杂交后代比来自雌性B ×雄性A的杂交后代具有更低的适应性），这可导致不对称BI（例如，雌性A和雄性B比雌性B和雄性A更不可能交配）。理解强化需要理解同种偏好在同域中是如何进化的。然而，当两性都很挑剔时，估计同种偏好可能很困难。在这项研究中，我们使用Lucania killifish来检验这一假设，即强化模式是由物种之间不对称的合子后隔离驱动的。如果是真的，我们预测同域分布的雌性长叶绿舟蛾和同域分布的雄性长叶绿舟蛾。与同域分布的同类相比，小球藻的BI水平应该较低，因为它们产生的杂交后代具有最高的适应性。为了解决这个问题，测量BI时，两性都是挑剔的，我们推断的贡献BI的每一个合作伙伴使用的测定，其中一个性别的交配对来自一个异域的人口具有潜在的低偏好，而其他来自一个同域的人口具有高偏好。对于一个杂交交叉方向，我们发现两个雌性L。parva和雄性L. goodi在共域中对BI的贡献很高。在另一个杂交组合中，发现只有雌性L。goodei有助于BI。同域雄性L. parva容易从事杂交产卵与异地L。好女人这些结果表明，不对称的合子后隔离和传统的性别特异性成本偏好可能会影响同种偏好和目标性状的选择的性质。
Reinforcement can occur when maladaptive hybridization in sympatry favors the evolution of conspecific preferences and target traits that promote behavioral isolation (BI). In many systems, enhanced BI is due to increased female preference for conspecifics. In others, BI is driven by male preference, and in other systems both sexes exert preferences. Some of these patterns can be attributed to classic sex-specific costs and benefits of preference. Alternatively, sex differences in conspecific preference can emerge due to asymmetric postzygotic isolation (e.g., hybrid offspring from female A × male B have lower fitness than hybrid offspring from female B × male A), which can lead to asymmetric BI (e.g., female A and male B are less likely to mate than female B and male A). Understanding reinforcement requires understanding how conspecific preferences evolve in sympatry. Yet, estimating conspecific preferences can be difficult when both sexes are choosy. In this study, we use Lucania killifish to test the hypothesis that patterns of reinforcement are driven by asymmetric postzygotic isolation between species. If true, we predicted that sympatric female Lucania goodei and sympatric male L. parva should have lower levels of BI compared with their sympatric counterparts, as they produce hybrid offspring with the highest fitness. To address the problem of measuring BI when both sexes are choosy, we inferred the contribution to BI of each partner using assays where one sex in the mating pair comes from an allopatric population with potentially low preference, whereas the other comes from a sympatric population with high preference. For one hybrid cross direction, we found that both female L. parva and male L. goodei have high contributions to BI in sympatry. In the other hybrid cross direction, we found that only female L. goodei contribute to BI. Sympatric male L. parva readily engaged in hybrid spawnings with allopatric L. goodei females. These results indicate that both asymmetric postzygotic isolation and the traditional sex-specific costs to preference likely affect the nature of selection on conspecific preferences and target traits.
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影响因子：
2.1
作者：
BUTLIN, RK;RITCHIE, MG
通讯作者：
RITCHIE, MG
影响因子：
1.9
作者：
Espinedo, Celeste M.;Gabor, Caitlin R.;Aspbury, Andrea S.
通讯作者：
Aspbury, Andrea S.
影响因子：
56.9
作者：
COYNE, JA;CRITTENDEN, AP;MAH, K
通讯作者：
MAH, K
影响因子：
3.3
作者：
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通讯作者：
Rundle, Howard D.
DOI：
10.1111/j.1095-8312.2007.00786.x
发表时间：
2007-05-01
影响因子：
1.9
作者：
Crow, Karen D.;Munehara, Hiroyuki;Bernardi, Giacomo
通讯作者：
Bernardi, Giacomo