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	Evolution of opsin genes reveals a functional role of vision in the echolocating little brown bat (myotis lucifugus)
	Zhao, Huabin1,2,3; Xu, Dong1; Zhou, Yingying1; Flanders, Jon1; Zhang, Shuyi1
刊名	Biochemical systematics and ecology
	2009-07-01
卷号	37期号:3页码:154-161
关键词	Opsin Vision Echolocation Evolution Purifying selection Little brown bat Echolocating bat
ISSN号	0305-1978
DOI	10.1016/j.bse.2009.03.001
通讯作者	Zhang, shuyi(syzhang@bio.ecnu.edu.cn)
英文摘要	Echolocating bats are able to orientate, navigate and forage without visual cues. to probe the role of vision in bats, we studied the visual opsin genes from the echolocating little brown bat (myotis lucifugus). short-wave length sensitive (sws1) opsin, middle/long-wavelength sensitive (m/lws) opsin and rhodopsin cdna sequences were identified from the ensembl database and validated by the sequencing of genomic dna. we retrieved the published orthologous genes from eleven additional representative species of mammals from genbank and conducted an evolutionary analysis. we found that the m/lws opsin and rhodopsin genes were both under strong purifying selection, whereas the sws1 opsin gene has undergone positive selection at two amino acid sites and one lineage, though the main evolutionary force is still purifying selection. two-ratio model of the sws1 opsin gene revealed that the omega ratio for the little brown bat lineage was nearly three times lower than the background ratio, suggesting a much stronger functional constraint. our relative rate tests show the little brown bat has a lower nonsynonymous substitution rate than those in other mammals (on average 32% lower) for the sws1 opsin gene. however, no such significant differences were detected for the m/lws opsin and rhodopsin genes. the results of the relative ratio tests are consistent with that of tests for selection, showing a history of purifying selection on the little brown bat opsin genes. these findings suggest a functional role of vision in the little brown bat despite being nocturnal and using echolocation. we speculate that this echolocating bat may be able to use visual cues to orientate, navigate and forage at night, to discriminate color under moonlight and starlight conditions, or to avoid predation by diurnal raptors. crown copyright (c) 2009 published by elsevier ltd. all rights reserved.
WOS关键词	SCHIFF-BASE COUNTERION ; GREEN COLOR-VISION ; ULTRAVIOLET VISION ; BOVINE RHODOPSIN ; MOLECULAR EVOLUTION ; VISUAL PIGMENTS ; VERTEBRATES ; GENETICS ; RED ; PHYLOGENETICS
WOS研究方向	Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000266960700003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2403216
专题	中国科学院大学
通讯作者	Zhang, Shuyi
作者单位	1.E China Normal Univ, Sch Life Sci, Shanghai 200062, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Inst Zool, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Huabin,Xu, Dong,Zhou, Yingying,et al. Evolution of opsin genes reveals a functional role of vision in the echolocating little brown bat (myotis lucifugus)[J]. Biochemical systematics and ecology,2009,37(3):154-161.
APA	Zhao, Huabin,Xu, Dong,Zhou, Yingying,Flanders, Jon,&Zhang, Shuyi.(2009).Evolution of opsin genes reveals a functional role of vision in the echolocating little brown bat (myotis lucifugus).Biochemical systematics and ecology,37(3),154-161.
MLA	Zhao, Huabin,et al."Evolution of opsin genes reveals a functional role of vision in the echolocating little brown bat (myotis lucifugus)".Biochemical systematics and ecology 37.3(2009):154-161.

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