A Cluster of Olfactory Receptor Genes Linked to Frugivory in Bats
A Cluster of Olfactory Receptor Genes Linked to Frugivory in Bats
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DOI：
10.1093/molbev/msu043
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发表时间：
2014-04-01
影响因子：
10.7
通讯作者：
Teeling, Emma C.
中科院分区：
文献类型：
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作者：
Hayden, Sara;Bekaert, Michael;Teeling, Emma C.
哺乳动物嗅觉受体（OR）库的多样性已在全球范围内重塑了生态位专业化。然而，鲜为人知的是，在一个较浅的进化时间框架的变异或剧目。巨大的蝙蝠辐射展示了一个非凡的各种营养和感官专业化。与其他哺乳动物不同，蝙蝠拥有独特而多样的OR基因库。我们阐明了OR基因库的进化是否可以与生态位专门化（如感觉方式和饮食）联系起来。对辐射翼手目27种蝙蝠的OR基因进行了扩增和测序。对于每个物种，完整和非功能基因进行了评估，并在每个基因家族的OR基因丰度进行了分析和比较。我们确定了一个独特的OR模式与新世界水果蝙蝠的食果饮食和旧世界水果蝙蝠的类似趋同模式有关。我们的研究结果表明，即使在一个浅的进化时间框架内，生态位专业化和或剧目多样性之间有很强的关联。
Diversity of the mammalian olfactory receptor (OR) repertoire has been globally reshaped by niche specialization. However, little is known about the variability of the OR repertoire at a shallower evolutionary timeframe. The vast bat radiation exhibits an extraordinary variety of trophic and sensory specializations. Unlike other mammals, bats possess a unique and diverse OR gene repertoire. We elucidated whether the evolution of the OR gene repertoire can be linked to ecological niche specializations, such as sensory modalities and diet. The OR gene repertoires of 27 bat species spanning the chiropteran radiation were amplified and sequenced. For each species, intact and nonfunctional genes were assessed, and the OR gene abundances in each gene family were analyzed and compared. We identified a unique OR pattern linked to the frugivorous diet of New World fruit-eating bats and a similar convergent pattern in the Old World fruit-eating bats. Our results show a strong association between niche specialization and OR repertoire diversity even at a shallow evolutionary timeframe.