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Linking Acrosome Size and Genetic Divergence in an Inter-Oceanic Mussel from the Pacific and Atlantic Coasts: A Case of Incipient Speciation?
Briones, Carolina; Nuñez, José J; Pérez, Montse; Garrido, Orlando; Campos, Bernardita; Godoy, Karina; Hartley, Ricardo; Oyarzún, Pablo A; Guiñez, Ricardo.
Afiliação
  • Briones C; Instituto de Ciencias Naturales Alexander von Humbodt, Facultad de Ciencias del Mar y de Recursos Biológicos, Universidad de Antofagasta, Angamos 601, Antofagasta 1270300, Chile.
  • Nuñez JJ; Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia 5090000, Chile.
  • Pérez M; AquaCOV, Centro Oceanográfico de Vigo, Instituto Español de Oceanografía, Consejo Superior de Investigaciones Científicas (IEO, CSIC), 36390 Vigo, Spain.
  • Garrido O; Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia 5090000, Chile.
  • Campos B; Independent Researcher, Orión 19, Viña del Mar 2580660, Chile.
  • Godoy K; Núcleo Científico y Tecnológico de Biorecursos (BIOREN), Universidad de La Frontera, Temuco 4811230, Chile.
  • Hartley R; Instituto de Investigación y Postgrado, Facultad de Medicina y Ciencias de la Salud, Universidad Central de Chile, Santiago 8330507, Chile.
  • Oyarzún PA; Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay 2340000, Chile.
  • Guiñez R; Instituto de Ciencias Naturales Alexander von Humbodt, Facultad de Ciencias del Mar y de Recursos Biológicos, Universidad de Antofagasta, Angamos 601, Antofagasta 1270300, Chile.
Animals (Basel) ; 14(5)2024 Feb 21.
Article em En | MEDLINE | ID: mdl-38473058
ABSTRACT
In recent years, advances in analyses of the sperm morphology and genetics of Perumytilus purpuratus have allowed to two evolutionary scenarios for this mussel to be suggested (1) the scenario of cryptic species and (2) the scenario of incipient or in progress speciation. For a better understanding of the evolutionary history of P. purpuratus, we performed extensive sampling along a latitudinal gradient of ca. 7180 km of coastline-from the Southern Pacific Ocean to the Atlantic Ocean-and we delved deeper into the sperm morphology of P. purpuratus, exploring its association with the phylogeny and population genetics to determine whether the variability in sperm traits between the northern and southern regions was a signal of cryptic or incipient species. Overall, our results showed that sperm sizes were strongly correlated with the genetic structure in males of P. purpuratus. We identified at 37° S on the Pacific coast a coincident break of both sperm size and genetic disruption that can be explained by historical events and postglacial recolonization as causal phenomena for the observed divergences. Furthermore, evidence of genetic admixture between lineages was found at 38° S, suggesting the presence of an introgressive hybridization zone and incomplete reproductive isolation in an in fraganti or incipient speciation process.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Animals (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Animals (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça