Hybrid chickadees are deficient in learning and memory
Hybrid chickadees are deficient in learning and memory
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杂交山雀缺乏学习和记忆能力
DOI：
10.1111/evo.13470
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发表时间：
2018
期刊：
影响因子：
3.3
通讯作者：
A. M. Rice
中科院分区：
文献类型：
--
作者：
M. McQuillan;T. Roth;A. V. Huynh;A. M. Rice
识别合子后生殖隔离的表型对于充分理解物种的进化和维持至关重要。一个潜在的合子后隔离障碍很少被检测到，那就是杂交后代的学习和记忆能力。学习和记忆是与健康相关的重要特征，特别是在分散囤积的物种中，准确地找回囤积的食物对冬季生存至关重要。在这里，我们通过比较两种散藏型鸣鸟--黑帽鸣鸟(Poecile Atricapillus)和卡罗莱纳山雀(Poecile Carolinens)及其自然产生的杂交后代的这些特征，来检验学习和记忆能力可以作为合子后隔离屏障的假设。在室外的鸟舍环境中，我们发现杂交山雀在联想学习空间任务上的表现明显较差，与两个亲本物种相比，它们在解决新问题方面也表现得更差。因此，学习和记忆能力的缺陷可能会导致山雀物种之间的合子后生殖隔离。考虑到学习和记忆对于健康的重要性，我们的结果表明，这些特征可能在合子后生殖隔离中发挥着重要但尚未被忽视的作用。
Identifying the phenotypes underlying postzygotic reproductive isolation is crucial for fully understanding the evolution and maintenance of species. One potential postzygotic isolating barrier that has rarely been examined is learning and memory ability in hybrids. Learning and memory are important fitness‐related traits, especially in scatter‐hoarding species, where accurate retrieval of hoarded food is vital for winter survival. Here, we test the hypothesis that learning and memory ability can act as a postzygotic isolating barrier by comparing these traits among two scatter‐hoarding songbird species, black‐capped (Poecile atricapillus) and Carolina chickadees (Poecile carolinensis), and their naturally occurring hybrids. In an outdoor aviary setting, we find that hybrid chickadees perform significantly worse on an associative learning spatial task and are worse at solving a novel problem compared to both parental species. Deficiencies in learning and memory abilities could therefore contribute to postzygotic reproductive isolation between chickadee species. Given the importance of learning and memory for fitness, our results suggest that these traits may play an important, but as yet overlooked, role in postzygotic reproductive isolation.
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
V. Pravosudov;T. Smulders
通讯作者：
V. Pravosudov;T. Smulders
影响因子：
1.9
作者：
V. Pravosudov;N. Clayton
通讯作者：
V. Pravosudov;N. Clayton