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1 April 2011 Mountain Ridge and Sea: Geographic-Barrier Effects on Genetic Diversity and Differentiation of the Hong Kong Newt (Paramesotriton hongkongensis) Revealed by AFLP
Yi-Xin Zhang, Cheng-Zhong He, David Dudgeon, Zhi-Yi Zhang, Gui-Ming Wang
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Abstract

The Hong Kong newt (Paramesotriton hongkongensis) has a restricted distribution in Hong Kong and its adjacent coastal area in China. We employed amplified fragment length polymorphism (AFLP) DNA markers to examine the genetic diversity and differentiation of P. hongkongensis populations (101 individuals) from three streams. Two mainland populations are separated by Tai Mo Shan, the highest peak in Hong Kong. On Hong Kong Island, there is only one population. We investigated whether the marine barrier would affect the population genetic structure and diversification of Hong Kong newts more than an upland peak barrier. With seven selected primer combinations, 476 AFLP markers with 102 polymorphic loci indicated that newt populations exhibited considerable genetic differentiation. Our results indicate that the two mainland populations, separated by the mountain ridge, were genetically more distant from each other than from the island population separated by the sea barrier that was created about 6000 years ago. The terrestrial biogeographic barrier appears to be crucial in influencing genetic divergence of Hong Kong newt populations.

Yi-Xin Zhang, Cheng-Zhong He, David Dudgeon, Zhi-Yi Zhang, and Gui-Ming Wang "Mountain Ridge and Sea: Geographic-Barrier Effects on Genetic Diversity and Differentiation of the Hong Kong Newt (Paramesotriton hongkongensis) Revealed by AFLP," Annales Zoologici Fennici 48(2), 119-127, (1 April 2011). https://doi.org/10.5735/086.048.0204
Received: 11 August 2010; Accepted: 1 December 2010; Published: 1 April 2011
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