Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data

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Rivers and lake systems in the southern cone of South America have been widely influenced by historic glaciations events, carrying important implications on the evolution of aquatic organisms including prompting transitions between marine and freshwater habitats and by triggering hybridization among...

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Autores principales:	Hughes, Lily C, Cardoso, Yamila Paula, Sommer, Julie A., Cifuentes, Roberto, Cuello, Mariela Vanesa, Somoza, Gustavo M., González-Castro, Mariano, Malabarba, Luiz Roberto, Cussac, Victor E., Habit, Evelyn, Betancur-R., Ricardo, Ortí, Guillermo
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2020
Materias:	Ciencias Naturales Biología Single Nucleotide Polymorphism (SNP) Patagonia glaciation cytochrome b introgression Odontesthes
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/137874
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-137874
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Biología Single Nucleotide Polymorphism (SNP) Patagonia glaciation cytochrome b introgression Odontesthes
spellingShingle	Ciencias Naturales Biología Single Nucleotide Polymorphism (SNP) Patagonia glaciation cytochrome b introgression Odontesthes Hughes, Lily C Cardoso, Yamila Paula Sommer, Julie A. Cifuentes, Roberto Cuello, Mariela Vanesa Somoza, Gustavo M. González-Castro, Mariano Malabarba, Luiz Roberto Cussac, Victor E. Habit, Evelyn Betancur-R., Ricardo Ortí, Guillermo Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
topic_facet	Ciencias Naturales Biología Single Nucleotide Polymorphism (SNP) Patagonia glaciation cytochrome b introgression Odontesthes
description	Rivers and lake systems in the southern cone of South America have been widely influenced by historic glaciations events, carrying important implications on the evolution of aquatic organisms including prompting transitions between marine and freshwater habitats and by triggering hybridization among incipient species via waterway connectivity and stream capture events. Silverside fishes (Odontesthes) in the region comprise a radiation of 19 marine and freshwater species that have been hypothesized on the basis of morphological or mitochondrial DNA data to have either transitioned repeatedly into continental waters from the sea or colonized marine habitats following freshwater diversification. New ddRAD data presented here provide a robust framework to investigate biogeographic history and habitat transitions in Odontesthes. We show that Odontesthes silversides originally diversified in the Pacific but independently colonized the Atlantic three times, producing three independent marine-to-freshwater transitions. Our results also indicate recent introgression of marine mitochondrial haplotypes into two freshwater clades, with more recurring instances of hybridization among Atlantic- vs. Pacific-slope species. In Pacific freshwater drainages, hybridization with a marine species appears to be geographically isolated and may be related to glaciation events. Substantial structural differences of estuarine gradients between these two geographic areas may have influenced the frequency, intensity, and evolutionary effects of hybridization events.
format	Articulo Preprint
author	Hughes, Lily C Cardoso, Yamila Paula Sommer, Julie A. Cifuentes, Roberto Cuello, Mariela Vanesa Somoza, Gustavo M. González-Castro, Mariano Malabarba, Luiz Roberto Cussac, Victor E. Habit, Evelyn Betancur-R., Ricardo Ortí, Guillermo
author_facet	Hughes, Lily C Cardoso, Yamila Paula Sommer, Julie A. Cifuentes, Roberto Cuello, Mariela Vanesa Somoza, Gustavo M. González-Castro, Mariano Malabarba, Luiz Roberto Cussac, Victor E. Habit, Evelyn Betancur-R., Ricardo Ortí, Guillermo
author_sort	Hughes, Lily C
title	Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
title_short	Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
title_full	Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
title_fullStr	Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
title_full_unstemmed	Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data
title_sort	biogeography, habitat transitions and hybridization in a radiation of south american silverside fishes revealed by mitochondrial and genomic rad data
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/137874
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Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data

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