Hong JIN,Bin LU and Jinzhong FU.Massive Molecular Parallel Evolution of the HSP90AA1 Gene between High-elevation Anurans[J].Asian Herpetological Research(AHR),2018,9(3):195-200.[doi:10.16373/j.cnki.ahr.180039]

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Massive Molecular Parallel Evolution of the HSP90AA1 Gene between High-elevation Anurans

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Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

Issue:

2018 VoI.9 No.3

Page:

195-200

Research Field:

Publishing date:

2018-09-25

Info

Title:

Massive Molecular Parallel Evolution of the HSP90AA1 Gene between High-elevation Anurans

Author(s):

Hong JIN¹;  Bin LU¹ and Jinzhong FU¹; ^2*

¹ Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
² Department of Integrative Biology, University of Guelph, Guelph, Ontario N1G2W1, Canada

Keywords:

molecular parallel evolution;  high-elevation;  case study;  amphibian;  HSP90AA1 gene

PACS:

-

DOI:

10.16373/j.cnki.ahr.180039

Abstract:

HSP90AA1 is part of the heat shock protein 90 gene family and has important functions against heat stress. We report a case of molecular level parallel evolution of the HSP90AA1 gene in high elevation amphibians. HSP90AA1 gene sequences of four high-elevation anurans, Bufo gargarizans, Nanorana parkeri, Rana kukunoris, and Scutiger boulengeri, were compared along with five of their low-elevation relatives. A total of 16 amino-acid sites were identified as parallel evolution between N. parkeri and R. kukunoris. We generated both model based (Zhang and Kumar’s test) and empirical data based (parallel/divergence plotting) null distributions for non-parallel evolution, and both methods clearly determined that the observed number of parallel substitutions were significantly more than the null expectation. Furthermore, on the HSP90AA1 gene tree, N. parkeri and R. kukunoris formed a strongly supported clade that was away from their respective relatives. This study provides a clear case of molecular parallel evolution, which may have significant implications in understanding the genetic mechanisms of high-elevation adaptation.

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