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Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents

Genetica

By:
, , , , , ,
DOI: 10.1007/s10709-012-9663-8

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Abstract

Grass carp (Ctenopharyngodon idella), a freshwater species native to China, has been introduced to about 100 countries/regions and poses both biological and environmental challenges to the receiving ecosystems. In this study, we analyzed genetic variation in grass carp from three introduced river systems (Mississippi River Basin in US, Danube River in Hungary, and Tone River in Japan) as well as its native ranges (Yangtze, Pearl, and Amur Rivers) in China using 21 novel microsatellite loci. The allelic richness, observed heterozygosity, and within-population gene diversity were found to be lower in the introduced populations than in the native populations, presumably due to the small founder population size of the former. Significant genetic differentiation was found between all pairwise populations from different rivers. Both principal component analysis and Bayesian clustering analysis revealed obvious genetic distinction between the native and introduced populations. Interestingly, genetic bottlenecks were detected in the Hungarian and Japanese grass carp populations, but not in the North American population, suggesting that the Mississippi River Basin grass carp has experienced rapid population expansion with potential genetic diversification during the half-century since its introduction. Consequently, the combined forces of the founder effect, introduction history, and rapid population expansion help explaining the observed patterns of genetic diversity within and among both native and introduced populations of the grass carp.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents
Series title:
Genetica
DOI:
10.1007/s10709-012-9663-8
Volume
140
Issue:
4-6
Year Published:
2012
Language:
English
Publisher:
Springer
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Columbia Environmental Research Center
Description:
13 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
115
Last page:
123
Number of Pages:
13
Other Geospatial:
Mississippi River Basin;Danube River;Tone River;Yangtze River;Pearl River;Amur River