Genetic relationships among populations of Mytilus desolationis from Kerguelen, M edulis from the North Atlantic and M. gallo-provincialis from the Mediterranean

Blot, Michel; Thiriot-Quiévreux, Catherine; Soyer, Jacques

doi:10.3354/meps044239

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…2008), and allozyme loci are also less polymorphic in Kerguelen than in Northern-Hemisphere populations of M. edulis (Blot et al. 1988). The smaller size of the Kerguelen metapopulation, compared to other less isolated populations worldwide, may explain its lower polymorphism (except at locus Glu-5′ ).…”

Section: Discussionmentioning

confidence: 99%

Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?

Gérard

Roby

Bierne

et al. 2015

Ecology and Evolution

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The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or any known hybrid zone. The finely carved coast leads to a highly heterogeneous habitat. We investigated the impact of the environment on the genetic structure in those Kerguelen blue mussels by relating allele frequencies to habitat descriptors. A total sample comprising up to 2248 individuals from 35 locations was characterized using two nuclear markers, mac-1 and Glu-5′, and a mitochondrial marker (COI). The frequency data from 9 allozyme loci in 9 of these locations were also reanalyzed. Two other nuclear markers (EFbis and EFprem's) were monomorphic. Compared to Northern Hemisphere populations, polymorphism in Kerguelen blue mussels was lower for all markers except for the exon Glu-5′. At Glu-5′, genetic differences were observed between samples from distinct regions (FCT = 0.077), as well as within two regions, including between samples separated by <500 m. No significant differentiation was observed in the AMOVA analyses at the two other markers (mac-1 and COI). Like mac-1, all allozyme loci genotyped in a previous publication, displayed lower differentiation (Jost's D) and FST values than Glu-5′. Power simulations and confidence intervals support that Glu-5′ displays significantly higher differentiation than the other loci (except a single allozyme for which confidence intervals overlap). AMOVA analyses revealed significant effects of the giant kelp Macrocystis and wave exposure on this marker. We discuss the influence of hydrological conditions on the genetic differentiation among regions. In marine organisms with high fecundity and high dispersal potential, gene flow tends to erase differentiation, but this study showed significant differentiation at very small distance. This may be explained by the particular hydrology and the carved coastline of the Kerguelen archipelago, together with spatially variable selection at Glu-5′.

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Section: Discussionmentioning

confidence: 99%

Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?

Gérard

Roby

Bierne

et al. 2015

Ecology and Evolution

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“…At the allozyme level mussels from the Kerguelen Islands are very similar to the South American group (McDonald et al 1991). Blot et al (1988) reported that the composition of the nuclear genomes of mussels in the Kerguelen Islands showed strong evidence of having been subject to genetic drift. Based on RFLP analysis of the whole mitochondrial genome, Blot et al (1990) also concluded that the mtDNA genomes of mussels from the Kerguelen Islands were distinct from those in mussels from southwest England and south Wales (Edwards and Skibinski 1987).…”

Section: Discussionmentioning

confidence: 99%

“…Based on RFLP analysis of the whole mitochondrial genome, Blot et al (1990) also concluded that the mtDNA genomes of mussels from the Kerguelen Islands were distinct from those in mussels from southwest England and south Wales (Edwards and Skibinski 1987). The distinctiveness of the Kerguelen Islands population may be due solely to genetic drift since they are 3500 km from the nearest continental land mass making it one of the most isolated areas on Earth (Blot et al 1988) (Fig. 1).…”

Section: Discussionmentioning

confidence: 99%

Origin of the antitropical distribution pattern in marine mussels ( Mytilus spp.): routes and timing of transequatorial migration

et al. 2000

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Many marine species, including mussels in the Mytilus edulis species group (i.e. M. edulis L., M. galloprovincialis Lamarck, and M. trossulus Gould), have an antitropical distribution pattern, with closely related taxa occurring in high latitudes of the northern and southern hemispheres but being absent from the tropics. We tested four hypotheses to explain the timing and route of transequatorial migration by species with antitropical distributions. These hypotheses yield dierent predictions for the phylogenetic relationship of southern hemisphere taxa relative to their northern counter-parts. The three Mytilus species were used to test these hypotheses since they exhibit a typical antitropical distribution and representative taxa occur in both the Paci®c and Atlantic. Two types of mtDNA lineages were found among populations of mussels collected from the southern hemisphere between 1988 and 1996; over 90% of the mtDNA lineages formed a distinct subclade which, on average, had 1.4% divergence from haplotypes found exclusively in northern Atlantic populations of M. galloprovincialis. These data indicate that southern hemisphere mussels arose from a migration event from the northern hemisphere during the Pleistocene via an Atlantic route. The remainder of the southern hemisphere lineages (<10%) were very closely related to mtDNA haplotypes found in both M. edulis and M. galloprovincialis in the northern hemisphere, suggesting a second, more recent migration to the southern hemisphere. There was no evidence that southern hemisphere mussels arose from Paci®c populations of mussels.

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“…Kerguelen Islands blue mussels (previously classified as Mytilus desolationis Lamy 1936) have greatest affinity to North Atlantic M. edulis based on their allozyme alleles (Blot, Thiriot‐Quiévreux & Soyer, 1988; McDonald et al ., 1991). Molecular analyses indicate that they (1) exhibit northern hemisphere affinities for mitochondrial lineage at the 16s rRNA gene, possibly as a result of a recent introduction (Hilbish et al ., 2000); (2) possess a nuclear genome of mixed M. edulis and M. galloprovincialis ancestry (Borsa, Daguin & Bierne, 2007); and (3) exhibit South American affinity for mitochondrial lineage at the cytochrome oxidase subunit I (COI) gene (Gérard et al ., 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity of Southern hemisphere blue mussels (Bivalvia: Mytilidae) and the identification of non-indigenous taxa

Westfall

Gardner

2010

Biological Journal of the Linnean Society

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The taxonomic and evolutionary affinities of Southern hemisphere smooth-shelled blue mussels are unclear, with studies using different marker types having identified different relationships among various geographic regions. Using an existing and a new molecular assay, the present study builds on previous work to test the distribution of blue mussels native to and introduced to the Southern hemisphere. Populations of Mytilus were sampled from New Zealand, Australia, and Chile. The nuclear-DNA marker Me 15/16 was used to identify the taxonomic status of 484 individuals. A new restriction fragment length polymorphism (RFLP) assay was used to identify the hemisphere of origin for a subset of Mytilus galloprovincialis. The Me15/16 marker identified 478 pure M. galloprovincialis from Southern hemisphere sites and six Mytilus edulis/M. galloprovincialis hybrids from the Auckland Islands (New Zealand) and Chile. A cytoplasmic RFLP identified Northern hemisphere M. galloprovincialis in almost every Southern hemisphere region. The presence of native M. galloprovincialis at high latitudes (up to 52°S) has implications for our understanding of environmentally induced selective constraints considered to determine species distributions. Widespread occurrence of invasive Northern hemisphere blue mussels in the Southern hemisphere is documented for the first time. Identification of inter-specific hybrids (M. edulis ¥ M. galloprovincialis) in Chile and in the Auckland Islands (subantarctic New Zealand) illustrates that environments ranging from international ports to remote protected locations are vulnerable to bioinvasion.

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Genetic relationships among populations of Mytilus desolationis from Kerguelen, M edulis from the North Atlantic and M. gallo-provincialis from the Mediterranean

Cited by 14 publications

References 18 publications

Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?

Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?

Origin of the antitropical distribution pattern in marine mussels ( Mytilus spp.): routes and timing of transequatorial migration

Genetic diversity of Southern hemisphere blue mussels (Bivalvia: Mytilidae) and the identification of non-indigenous taxa

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