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Vol. 51 No. 3, 2012
Significant Genetic Differentiation among Ten Populations of
the Razor Clam Sinonovacula constricta along the Coast of China
Revealed by a Microsatellite Analysis
Dong-Hong
Niu1, Bing-Bing Feng1, Da-Bo Liu1, Yu-Min Zhong1, He-Ding Shen1,
and Jia-Le Li1,2,*
1Key
Laboratory of Exploration and Utilization of Aquatic Genetic Resources,
Shanghai Ocean University, Ministry of Education, 999 Hucheng Huan
Road, Shanghai 201306, China
2Aquaculture Division, E-Institute of Shanghai
Universities, Shanghai Ocean University, 999 Hucheng Huan Road,
Shanghai 201306, China
Dong-Hong Niu, Bing-Bing Feng, Da-Bo Liu, Yu-Min
Zhong, He-Ding Shen, and Jia-Le Li (2012) The razor clam Sinonovacula constricta
is a common shellfish in human seafood diets. Little is known about the
genetic structure of the species on the coast of China. In this study,
the genetic diversity and differentiation of S. constricta from the
northern, middle, and southern coasts of China were estimated using 8
microsatellites. The 10 populations possessed high allelic (Ar =
6.0-7.0) and genetic diversities (Ho = 0.737-0.909 and He =
0.836-0.882) across the 8 microsatellite loci. The FST analysis
indicated significant genetic differentiation (FST = 0.044, p <
0.05) among the 10 populations. Two populations in the middle region
significantly differed from the remaining populations (FST =
0.039-0.125, p < 0.05). Moreover, the phylogenetic Neighbor-joining
tree analysis showed that the 10 populations were divided into 2
groups: 1 group included populations in the middle region and 2
populations of the northern region, and the other group consisted of
populations in the southern region and the remaining ones from the
northern region. Potential reasons for the high genetic diversity and
significant population differentiation are discussed. Perhaps, there is
a cryptic species according to the significantly high genetic
divergence among the 10 populations of S. constricta.
Key words: Sinonovacula constricta,
Microsatellite, Genetic diversity, Genetic differentiation.
*Correspondence: Tel/Fax: 86-021-61900401.
E-mail:jlli@shou.edu.cn
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