Population Genetics of the Eastern Oyster<i>Crassostrea virginica</i>(Gmelin, 1791) in the Gulf of Mexico

Varney, Robin L.; Galindo-Sánchez, Clara E.; Cruz, Pedro; Gaffney, Patrick M.

doi:10.2983/035.028.0415

Cited by 38 publications

(35 citation statements)

References 26 publications

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“…Several studies have shown that a hindrance to gene flow exists between the western and eastern Mediterranean, even for species with high dispersal capabilities and large population sizes (e.g., [65], [66], [67]). This result was partially consistent with findings reported for other bivalves with a high potential for dispersal, along with significant genetic differentiation and a pattern of isolation by distance (e.g., [68], [69], [70]). …”

Section: Discussionsupporting

confidence: 91%

Mitochondrial DNA Reveals Genetic Structuring of Pinna nobilis across the Mediterranean Sea

et al. 2013

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Pinna nobilis is the largest endemic Mediterranean marine bivalve. During past centuries, various human activities have promoted the regression of its populations. As a consequence of stringent standards of protection, demographic expansions are currently reported in many sites. The aim of this study was to provide the first large broad-scale insight into the genetic variability of P. nobilis in the area that encompasses the western Mediterranean, Ionian Sea, and Adriatic Sea marine ecoregions. To accomplish this objective twenty-five populations from this area were surveyed using two mitochondrial DNA markers (COI and 16S). Our dataset was then merged with those obtained in other studies for the Aegean and Tunisian populations (eastern Mediterranean), and statistical analyses (Bayesian model-based clustering, median-joining network, AMOVA, mismatch distribution, Tajima’s and Fu’s neutrality tests and Bayesian skyline plots) were performed. The results revealed genetic divergence among three distinguishable areas: (1) western Mediterranean and Ionian Sea; (2) Adriatic Sea; and (3) Aegean Sea and Tunisian coastal areas. From a conservational point of view, populations from the three genetically divergent groups found may be considered as different management units.

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Section: Discussionsupporting

confidence: 91%

Mitochondrial DNA Reveals Genetic Structuring of Pinna nobilis across the Mediterranean Sea

et al. 2013

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“…Some intraspecific genetic differences have been observed in Crassostrea rhizophorae from the Caribbean (Hedgecock & Okazaki 1984) and between Atlantic and Gulf of Mexico C. virginica (Hare & Avise 1998, Varney et al 2009). As the larvae of Crassostrea are planktonic and have great dispersal capability (for instance, C. virginica larvae can spend 2 to 3 wk in the plankton; Kennedy 1996), the high levels of genetic differentiation found in these works and in the present study are surprising.…”

Section: Geographical Distribution Isolation By Distance and Histormentioning

confidence: 99%

Phylogeny and phylogeography of Atlantic oyster species: evolutionary history, limited genetic connectivity and isolation by distance

Lazoski¹,

Gusmão²,

Boudry³

et al. 2011

Mar. Ecol. Prog. Ser.

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The phylogenetic relationships between naturally occurring Atlantic Crassostrea oyster species were inferred through analyses of mitochondrial (cytochrome oxidase subunit I and 16S) and nuclear (second internal transcribed spacer) sequences. We also scored 15 allozyme loci on 422 oysters to study population structuring of C. rhizophorae and C. brasiliana along 9000 km of the Western Atlantic coastline. Despite morphological similarities, C. virginica was genetically more closely related to C. rhizophorae than to C. brasiliana. In contrast, C. paraibanensis was genetically indistinguishable from C. brasiliana, which is probably a junior synonym of the African C. gasar. Significant genetic differentiation between populations of C. rhizophorae and C. gasar were found along the Western Atlantic coast, supporting an isolation-by-distance pattern.

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“…While highly polymorphic markers such as microsatellite and SNPs have been widely applied in oysters (Hubert and Hedgecock 2004;Varney et al 2009) and have been used for population genetic studies in the past, these approaches suffer from the fact that they tend to be both time consuming and relatively expensive (Fleury et al 2009;Quilang et al 2007). Furthermore, it has been demonstrated that, high levels of non-amplification and PCR-null alleles are often problems in oysters (Xiao et al 2010;Yu and Guo 2005).…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial DNA sequence analysis from multiple gene fragments reveals genetic heterogeneity of Crassostrea ariakensis in East Asia

et al. 2014

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The native Asian oyster, Crassostrea ariakensis is one of the most common and important Crassostrea species that occur naturally along the coast of East Asia. Molecular species diagnosis is a prerequisite for population genetic analysis of wild oyster populations because oyster species cannot be discriminated reliably using external morphological characters alone due to character ambiguity. To date there have been few phylogeographic studies of natural edible oyster populations in East Asia, in particular this is true of the common species in Korea C. ariakensis. We therefore assessed the levels and patterns of molecular genetic variation in East Asian wild populations of C. ariakensis from Korea, Japan, and China using DNA sequence analysis of five concatenated mtDNA regions namely; 16S rRNA, cytochrome oxidase I, cytochrome oxidase II, cytochrome oxidase III, and cytochrome b. Two divergent C. ariakensis clades were identified between southern China and remaining sites from the northern region. In addition, hierarchical AMOVA and pairwise U ST analyses showed that genetic diversity was discontinuous among wild populations of C. ariakensis in East Asia. Biogeographical and historical sea level changes are discussed as potential factors that may have influenced the genetic heterogeneity of wild C. ariakensis stocks across this region.

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Population Genetics of the Eastern OysterCrassostrea virginica(Gmelin, 1791) in the Gulf of Mexico

Cited by 38 publications

References 26 publications

Mitochondrial DNA Reveals Genetic Structuring of Pinna nobilis across the Mediterranean Sea

Mitochondrial DNA Reveals Genetic Structuring of Pinna nobilis across the Mediterranean Sea

Phylogeny and phylogeography of Atlantic oyster species: evolutionary history, limited genetic connectivity and isolation by distance

Mitochondrial DNA sequence analysis from multiple gene fragments reveals genetic heterogeneity of Crassostrea ariakensis in East Asia

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