RT Journal Article
T1 Promiscuous Speciation with Gene Flow in Silverside Fish Genus Odontesthes (Atheriniformes, Atherinopsidae) from South Western Atlantic Ocean Basins
A1 García, Graciela
A1 Ríos, Néstor
A1 Gutiérrez, Verónica
A1 Guerra Varela, Jorge
A1 Bouza Fernández, María Carmen
A1 Gómez Pardo, María Belén
A1 Martínez Portela, Paulino
AB The present paper integrates phylogenetic and population genetics analyses based on mitochondrial and nuclear molecular markers in silversides, genus Odontesthes, from a non-sampled area in the SW Atlantic Ocean to address species discrimination and to define Managements Units for sustainable conservation. All phylogenetic analyses based on the COI mitochondrial gene were consistent to support the monophyly of the genus Odontesthes and to include O. argentinensis, O. perugiae-humensis and some O. bonariensis haplotypes in a basal polytomy conforming a major derivative clade. Microsatellites data revealed somewhat higher genetic variability values in the O. argentinensis-perugia populations than in O. bonariensis and O. perugia-humensis taxa. Contrasting population genetics structuring emerged from mitochondrial and microsatellites analyses in these taxa. Whereas mitochondrial data supported two major groups (O. argentinensis-perugia-humensis vs. O. bonariensis-perugiae-humensis populations), microsatellite data detected three major genetic entities represented by O. bonariensis, O. perugiae-humensis and an admixture of populations belonging to O. argentinensis-perugiae respectively. Therefore, the star COI polytomy in the tree topology involving these taxa could be interpreted by several hypothetic scenarios such as the existence of shared ancestral polymorphisms, incomplete lineage sorting in a radiating speciation process and/or reticulation events. Present findings support that promiscuous and recent contact between incipient species sharing asymmetric gene flow exchanges, blurs taxa boundaries yielding complicated taxonomy and Management Units delimitation in silverside genus Odontesthes from SW Atlantic Ocean basins.
PB PLOS
YR 2014
FD 2014
LK http://hdl.handle.net/10347/22388
UL http://hdl.handle.net/10347/22388
LA eng
NO García G, Ríos N, Gutiérrez V, Varela JG, Bouza Fernández C, Pardo BG, et al. (2014) Promiscuous Speciation with Gene Flow in Silverside Fish Genus Odontesthes (Atheriniformes, Atherinopsidae) from South Western Atlantic Ocean Basins. PLoS ONE 9(8): e104659. https://doi.org/10.1371/journal.pone.0104659
NO This research received financial support from the project Fondo María Viñas_2009_1_2793 (FMV_2009_1_2793_Project) granted by the Agencia Nacional de Investigación e Inovación (ANII) of Uruguay
DS Minerva
RD 28 abr 2026