alexa Molecular Phylogeny of Pheretimoid Earthworms (Haplotaxina: Megascolecidae) Based on Mitochondrial DNA in Hainan Island, China
ISSN: 2168-9547

Molecular Biology: Open Access
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Research Article

Molecular Phylogeny of Pheretimoid Earthworms (Haplotaxina: Megascolecidae) Based on Mitochondrial DNA in Hainan Island, China

Qi Zhao1,2, Daniel Cluzeau2, Jibao Jiang1, Eric J Petit3, Charlène Briard2, Jing Sun1, Andreas Prinzing2 and Jiangping Qiu1*

1Ecology Lab, School of Agriculture and Biology, Shanghai Jiaotong University, 200240, Shanghai, China

2Université de Rennes 1, UMR CNRS 6553 EcoBio, Station Biologique, 35380 Paimpont, Rennes, France

3INRA, UMR985 ESE, F-35042 Rennes cedex, France

*Corresponding Author:
Jiangping Qiu
Ecology Lab, School of Agriculture and Biology
Shanghai Jiaotong University, 200240, Shanghai, China
Tel: +86 (0)21342061 42
Fax: +86 (0)2134206142
E-mail: [email protected]

Received date: September 23, 2015; Accepted date: October 13, 2015; Published date: October 20, 2015

Citation: Zhao Q, Cluzeau D, Jiang J, Petit EJ, Briard C, et al. (2015) Molecular Phylogeny of Pheretimoid Earthworms (Haplotaxina: Megascolecidae) Based on Mitochondrial DNA in Hainan Island, China. Mol Biol 4:138. doi:10.4172/2168-9547.1000138

Copyright: © 2015 Zhao Q, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

In the Chinese Hainan Island, Amynthas and Metaphire are two dominated pheretimoid earthworm species belonging to the family Megascolecidae. They differ from earthworms in the adjacent regions in their morphology and at the molecular level, which could have occurred due to the unique geography of Hainan Island. Hainan Island is made of two tectonic parts linked to South China and Indochina blocks, respectively. In addition, there is an apparent complicated link between Hainan Island and mainland China because of the different plate movements and sea level changes. In order to understand the evolution of pheretimoid earthworms in Hainan Island, we first investigated the earthworm biodiversity here. Bayesian phylogenetic tree was then constructed from 3511 base pairs from five mitochondrial genes: COI, COII, 16S, 12S, and ND1. Their divergent time was finally traced based on the molecular clock of 2.0-2.4% substitutions/Ma. The results showed three species differentiations between Hainan and Guangdong earthworm species. According to the paleogeography of Asiatic regions (including Hainan Island itself), we hypothesized that the Hainan pheretimoid earthworms might originate from Southeast Asia, and then they dispersed to the south and finally arrived at South China and Hainan Island. Meanwhile, due to the geology movement of the adjacent plates, there was also the migration of earthworms among adjacent regions. Furthermore, we also considered that the relationship between genera Metaphire and Amynthas might be re-considered as one genus.

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