Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy

Abstract Discordance between mitochondrial and nuclear patterns of population genetic structure is providing key insights into the eco-evolutionary dynamics between and within species, and their assessment is highly relevant to biodiversity monitoring practices based on DNA barcoding approaches. Her...

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Autores principales:	Roberta Bisconti, Daniele Porretta, Paola Arduino, Giuseppe Nascetti, Daniele Canestrelli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9a4ae168b8394b12bef4a0a0d92bf9a5
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spelling	oai:doaj.org-article:9a4ae168b8394b12bef4a0a0d92bf9a52021-12-02T15:08:06ZHybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy10.1038/s41598-018-31535-x2045-2322https://doaj.org/article/9a4ae168b8394b12bef4a0a0d92bf9a52018-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-31535-xhttps://doaj.org/toc/2045-2322Abstract Discordance between mitochondrial and nuclear patterns of population genetic structure is providing key insights into the eco-evolutionary dynamics between and within species, and their assessment is highly relevant to biodiversity monitoring practices based on DNA barcoding approaches. Here, we investigate the population genetic structure of the fire salamander Salamandra salamandra in peninsular Italy. Both mitochondrial and nuclear markers clearly identified two main population groups. However, nuclear and mitochondrial zones of geographic transition between groups were located 600 km from one another. Recent population declines in central Italy partially erased the genetic imprints of past hybridization dynamics. However, the overall pattern of genetic variation, together with morphological and fossil data, suggest that a rampant mitochondrial introgression triggered the observed mitonuclear discordance, following a post-glacial secondary contact between lineages. Our results clearly show the major role played by reticulate evolution in shaping the structure of Salamandra salamandra populations and, together with similar findings in other regions of the species’ range, contribute to identify the fire salamander as a particularly intriguing case to investigate the complexity of mechanisms triggering patterns of mitonuclear discordance in animals.Roberta BiscontiDaniele PorrettaPaola ArduinoGiuseppe NascettiDaniele CanestrelliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Roberta Bisconti Daniele Porretta Paola Arduino Giuseppe Nascetti Daniele Canestrelli Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
description	Abstract Discordance between mitochondrial and nuclear patterns of population genetic structure is providing key insights into the eco-evolutionary dynamics between and within species, and their assessment is highly relevant to biodiversity monitoring practices based on DNA barcoding approaches. Here, we investigate the population genetic structure of the fire salamander Salamandra salamandra in peninsular Italy. Both mitochondrial and nuclear markers clearly identified two main population groups. However, nuclear and mitochondrial zones of geographic transition between groups were located 600 km from one another. Recent population declines in central Italy partially erased the genetic imprints of past hybridization dynamics. However, the overall pattern of genetic variation, together with morphological and fossil data, suggest that a rampant mitochondrial introgression triggered the observed mitonuclear discordance, following a post-glacial secondary contact between lineages. Our results clearly show the major role played by reticulate evolution in shaping the structure of Salamandra salamandra populations and, together with similar findings in other regions of the species’ range, contribute to identify the fire salamander as a particularly intriguing case to investigate the complexity of mechanisms triggering patterns of mitonuclear discordance in animals.
format	article
author	Roberta Bisconti Daniele Porretta Paola Arduino Giuseppe Nascetti Daniele Canestrelli
author_facet	Roberta Bisconti Daniele Porretta Paola Arduino Giuseppe Nascetti Daniele Canestrelli
author_sort	Roberta Bisconti
title	Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
title_short	Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
title_full	Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
title_fullStr	Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
title_full_unstemmed	Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy
title_sort	hybridization and extensive mitochondrial introgression among fire salamanders in peninsular italy
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/9a4ae168b8394b12bef4a0a0d92bf9a5
work_keys_str_mv	AT robertabisconti hybridizationandextensivemitochondrialintrogressionamongfiresalamandersinpeninsularitaly AT danieleporretta hybridizationandextensivemitochondrialintrogressionamongfiresalamandersinpeninsularitaly AT paolaarduino hybridizationandextensivemitochondrialintrogressionamongfiresalamandersinpeninsularitaly AT giuseppenascetti hybridizationandextensivemitochondrialintrogressionamongfiresalamandersinpeninsularitaly AT danielecanestrelli hybridizationandextensivemitochondrialintrogressionamongfiresalamandersinpeninsularitaly
_version_	1718388266645848064

Hybridization and extensive mitochondrial introgression among fire salamanders in peninsular Italy

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