Bracketing phenogenotypic limits of mammalian hybridization
Savriama, Yoland (University of Helsinki. Institute of Biotechnology)
Valtonen, Mia (University of Eastern Finland. Department of Environmental and Biological Sciences)
Kammonen, Juhana I. (University of Helsinki. Institute of Biotechnology)
Rastas, Pasi (University of Helsinki. Institute of Biotechnology)
Smolander, Olli-Pekka (University of Helsinki. Institute of Biotechnology)
Lyyski, Annina (University of Helsinki. Institute of Biotechnology)
Häkkinen, Teemu J. (University of Helsinki. Institute of Biotechnology)
Corfe, Ian J. (University of Helsinki. Institute of Biotechnology)
Gerber, Sylvain (Centre National de la Recherche Scientifique. Sorbonne Université. Institut Systématique Evolution Biodiversité)
Salazar Ciudad, Isaac (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Paulin, Lars (University of Helsinki. Institute of Biotechnology)
Holm, Liisa (University of Helsinki. Institute of Biotechnology)
Löytynoja, Ari (University of Helsinki. Institute of Biotechnology)
Auvinen, Petri (University of Helsinki. Institute of Biotechnology)
Jernvall, Jukka (University of Helsinki. Institute of Biotechnology)

Date:	2018
Abstract:	An increasing number of mammalian species have been shown to have a history of hybridization and introgression based on genetic analyses. Only relatively few fossils, however, preserve genetic material, and morphology must be used to identify the species and determine whether morphologically intermediate fossils could represent hybrids. Because dental and cranial fossils are typically the key body parts studied in mammalian palaeontology, here we bracket the potential for phenotypically extreme hybridizations by examining uniquely preserved cranio-dental material of a captive hybrid between grey and ringed seals. We analysed how distinct these species are genetically and morphologically, how easy it is to identify the hybrids using morphology and whether comparable hybridizations happen in the wild. We show that the genetic distance between these species is more than twice the modern human-Neanderthal distance, but still within that of morphologically similar species pairs known to hybridize. By contrast, morphological and developmental analyses show grey and ringed seals to be highly disparate, and that the hybrid is a predictable intermediate. Genetic analyses of the parent populations reveal introgression in the wild, suggesting that grey-ringed seal hybridization is not limited to captivity. Taken together, we postulate that there is considerable potential for mammalian hybridization between phenotypically disparate taxa.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Species hybridization ; Introgression ; Developmental conservation ; Disparity ; Morphology ; Dental
Published in:	Royal Society Open Science, Vol. 5, Issue 11 (November 2018) , art. 180903, ISSN 2054-5703

DOI: 10.1098/rsos.180903
PMID: 30564397

12 p, 910.5 KB

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