Molecular Characterization of the Chilean Blue Mussel (Mytilus Chilensis Hupe 1854) Demonstrates Evidence for the Occurrence of Mytilus Galloprovincialis in Southern Chile

Toro, Jorge E.; Ojeda, Johana A; Vergara, Ana M.; Castro, Grace C.; Alcapán, Angélica C

doi:10.2983/0730-8000(2005)24[1117:mcotcb]2.0.co;2

Cited by 35 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of NH-M. edulis-like or M. edulis platensis 'alleles' has been reported in the South Pacific (e.g. Toro, Ojeda, Vergara, Castro, & Alcapán, 2005), including Magallanes (e.g. Trucco, 2000).…”

Section: Introductionmentioning

confidence: 96%

A biogeography‐based management forMytilus chilensis: The genetic hodgepodge of Los Lagos versus the pristine hybrid zone of the Magellanic ecotone

Díaz‐Puente

Pita

Uribe

et al. 2020

Aquatic Conservation

View full text Add to dashboard Cite

This study was intended to identify mussel species from the Magellanic ecotone, quantifying interspecific hybridization within Mytilus and depicting the genetic architecture of Mytilus chilensis in its South Pacific range. The analysis comprises the sub‐Antarctic Magallanes Province as a rich ecotone of climates, ecosystems and admixed faunas embedded among the biogeographic regions of the Pacific, the Atlantic, and Antarctica. Highly conserved molecular sequences within species were used to identify species, and polymorphic microsatellites were used to calculate the genetic architecture of M. chilensis. The absence of the invasive species Mytilus galloprovincialis from the M. chilensis range clarifies previous doubts on its expansion southward from the Arauco Gulf. The ubiquitous presence of the typical Glu‐5′‐Me‐15/16 PAP allele of Mytilus trossulus in the Northern Hemisphere might come from hull biofouling, but rather it seems to be an ancient polymorphism conserved in M. chilensis as occurs in blue mussels from other regions of the Southern Hemisphere. There is a very limited connectivity (FST = 0.167) between two latitudinal gene pools of M. chilensis that are highly divergent in composition, architecture, and ecological relevance. Fifty years of aquaculture enhancement in Los Lagos explains its high diversity and genetic heterogeneity among patches, so its mussel management should seek a balance between exploitation and environmental sustainability. The Magellanic ecotone bears a pristine M. chilensis × Mytilus edulis platensis hybrid zone around the Southern Cone, larger (450 km) than previously thought. Such a hybrid zone permeates one of the last remaining wilderness areas in the world (Cape Horn Biosphere Reserve) and is a natural laboratory for addressing introgression, hybridization, and evolution of Mytilus spp. genomes in their last southern frontier.

show abstract

Section: Introductionmentioning

confidence: 96%

A biogeography‐based management forMytilus chilensis: The genetic hodgepodge of Los Lagos versus the pristine hybrid zone of the Magellanic ecotone

Díaz‐Puente

Pita

Uribe

et al. 2020

Aquatic Conservation

View full text Add to dashboard Cite

show abstract

“…In general, M. trossulus is considered as the cold-water adapted species, M. edulis resides in temperate areas and M. galloprovincialis tolerates higher temperatures and has the most southerly native distribution of these three species in Europe in the Mediterranean and Black Sea. Moreover, M. galloprovincialis has successfully invaded temperate waters in other geographic areas such as South Africa, North and South America, Asia and Australia [37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Trans-Atlantic Distribution and Introgression as Inferred from Single Nucleotide Polymorphism: Mussels Mytilus and Environmental Factors

Wenne

Zbawicka

Bach

et al. 2020

Genes

View full text Add to dashboard Cite

Large-scale climate changes influence the geographic distribution of biodiversity. Many taxa have been reported to extend or reduce their geographic range, move poleward or displace other species. However, for closely related species that can hybridize in the natural environment, displacement is not the only effect of changes of environmental variables. Another option is subtler, hidden expansion, which can be found using genetic methods only. The marine blue mussels Mytilus are known to change their geographic distribution despite being sessile animals. In addition to natural dissemination at larval phase—enhanced by intentional or accidental introductions and rafting—they can spread through hybridization and introgression with local congeners, which can create mixed populations sustaining in environmental conditions that are marginal for pure taxa. The Mytilus species have a wide distribution in coastal regions of the Northern and Southern Hemisphere. In this study, we investigated the inter-regional genetic differentiation of the Mytilus species complex at 53 locations in the North Atlantic and adjacent Arctic waters and linked this genetic variability to key local environmental drivers. Of seventy-nine candidate single nucleotide polymorphisms (SNPs), all samples were successfully genotyped with a subset of 54 SNPs. There was a clear interregional separation of Mytilus species. However, all three Mytilus species hybridized in the contact area and created hybrid zones with mixed populations. Boosted regression trees (BRT) models showed that inter-regional variability was important in many allele models but did not prevail over variability in local environmental factors. Local environmental variables described over 40% of variability in about 30% of the allele frequencies of Mytilus spp. For the 30% of alleles, variability in their frequencies was only weakly coupled with local environmental conditions. For most studied alleles the linkages between environmental drivers and the genetic variability of Mytilus spp. were random in respect to “coding” and “non-coding” regions. An analysis of the subset of data involving functional genes only showed that two SNPs at Hsp70 and ATPase genes correlated with environmental variables. Total predictive ability of the highest performing models (r2 between 0.550 and 0.801) were for alleles that discriminated most effectively M. trossulus from M. edulis and M. galloprovincialis, whereas the best performing allele model (BM101A) did the best at discriminating M. galloprovincialis from M. edulis and M. trossulus. Among the local environmental variables, salinity, water temperature, ice cover and chlorophyll a concentration were by far the greatest predictors, but their predictive performance varied among different allele models. In most cases changes in the allele frequencies along these environmental gradients were abrupt and occurred at a very narrow range of environmental variables. In general, regions of change in allele frequencies for M. trossulus occurred at 8–11 psu, 0–10 °C, 60%–70% of ice cover and 0–2 mg m−3 of chlorophyll a, M. edulis at 8–11 and 30–35 psu, 10–14 °C and 60%–70% of ice cover and for M. galloprovincialis at 30–35 psu, 14–20 °C.

show abstract

“…Previous studies of taxa composition in the Strait of Magellan were performed using mono-locus DNA molecular markers such as ITS, Glu-5′/Glu-3′, Me15/16 (Díaz-Puente et al, 2020;Illesca et al, 2018;Larraín et al, 2012;Oyarzún et al, 2016;Toro et al, 2005), sequencing the cytochrome c oxidase subunit 1 gene (Borsa et al, 2012). However, the use of mono-locus markers gave conflicting results because they target genomic regions with different evolutionary histories, and not all markers are diagnostic for every species among the Mytilus genus.…”

Section: Discussionmentioning

confidence: 99%

“…The Strait of Magellan connects the Pacific with the Atlantic oceans, allowing contact between M. chilensis and M. platensis that inhabit the coastal areas of these oceans respectively, making possible the arising of a natural hybrid zone (Gardner et al., 2021). Previous studies of taxa composition in the Strait of Magellan were performed using mono‐locus DNA molecular markers such as ITS, Glu‐5′/Glu‐3′, Me15/16 (Díaz‐Puente et al., 2020; Illesca et al., 2018; Larraín et al., 2012; Oyarzún et al., 2016; Toro et al., 2005), sequencing the cytochrome c oxidase subunit 1 gene (Borsa et al., 2012). However, the use of mono‐locus markers gave conflicting results because they target genomic regions with different evolutionary histories, and not all markers are diagnostic for every species among the Mytilus genus.…”

Section: Discussionmentioning

confidence: 99%

SNP genotyping revealed a hybrid zone between Mytilus chilensis and M. platensis in southern South America (the Strait of Magellan, Isla Grande de Tierra del Fuego and the Falkland Islands)

Jilberto,

Zbawicka,

Wenne

et al. 2023

Molecular Ecology

View full text Add to dashboard Cite

Hybrid zones among mussel species have been extensively studied in the northern hemisphere. In South America, it has only recently become possible to study the natural hybrid zones, due to the clarification of the taxonomy of native mussels of the Mytilus genus. Analysing 54 SNP markers, we show the genetic species composition and admixture in the hybrid zone between M. chilensis and M. platensis in the southern end of South America. Bayesian, non‐Bayesian clustering and re‐assignment algorithms showed that the natural hybrid zone between M. chilensis and M. platensis in the Strait of Magellan, Isla Grande de Tierra del Fuego and the Falkland Islands shows clinal architecture. The hybrid zone can be divided into three different areas: the first one is on the Atlantic coast where only pure M. platensis and hybrid were found. In the second one, inside the Strait of Magellan, pure individuals of both species and mussels with variable degrees of hybridisation coexist. In the last area at the Strait in front of Punta Arenas City, fjords on the Isla Grande de Tierra del Fuego, and at the Beagle Channel, only M. chilensis and a low number of hybrids were found. According to the proportion of hybrids, bays with protected conditions away from strong currents would give better conditions for hybridisation. We do not find evidence of any other mussel species such as M. edulis, M. galloprovincialis, M. planulatus or M. trossulus in the zone.

show abstract

Molecular Characterization of the Chilean Blue Mussel (Mytilus Chilensis Hupe 1854) Demonstrates Evidence for the Occurrence of Mytilus Galloprovincialis in Southern Chile

Cited by 35 publications

References 24 publications

A biogeography‐based management forMytilus chilensis: The genetic hodgepodge of Los Lagos versus the pristine hybrid zone of the Magellanic ecotone

A biogeography‐based management forMytilus chilensis: The genetic hodgepodge of Los Lagos versus the pristine hybrid zone of the Magellanic ecotone

Trans-Atlantic Distribution and Introgression as Inferred from Single Nucleotide Polymorphism: Mussels Mytilus and Environmental Factors

SNP genotyping revealed a hybrid zone between Mytilus chilensis and M. platensis in southern South America (the Strait of Magellan, Isla Grande de Tierra del Fuego and the Falkland Islands)

Contact Info

Product

Resources

About