Ancient mitogenomics elucidates diversity of extinct West Indian tortoises

Abstract We present 10 nearly complete mitochondrial genomes of the extinct tortoise Chelonoidis alburyorum from the Bahamas. While our samples represent morphologically distinct populations from six islands, their genetic divergences were shallow and resembled those among Galápagos tortoises. Our m...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Christian Kehlmaier, Nancy A. Albury, David W. Steadman, Eva Graciá, Richard Franz, Uwe Fritz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/80e9be9a03db44139ccb8dff41c32d05
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:80e9be9a03db44139ccb8dff41c32d05
record_format	dspace
spelling	oai:doaj.org-article:80e9be9a03db44139ccb8dff41c32d052021-12-02T14:27:02ZAncient mitogenomics elucidates diversity of extinct West Indian tortoises10.1038/s41598-021-82299-w2045-2322https://doaj.org/article/80e9be9a03db44139ccb8dff41c32d052021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82299-whttps://doaj.org/toc/2045-2322Abstract We present 10 nearly complete mitochondrial genomes of the extinct tortoise Chelonoidis alburyorum from the Bahamas. While our samples represent morphologically distinct populations from six islands, their genetic divergences were shallow and resembled those among Galápagos tortoises. Our molecular clock estimates revealed that divergence among Bahamian tortoises began ~ 1.5 mya, whereas divergence among the Galápagos tortoises (C. niger complex) began ~ 2 mya. The inter-island divergences of tortoises from within the Bahamas and within the Galápagos Islands are much younger (0.09–0.59 mya, and 0.08–1.43 mya, respectively) than the genetic differentiation between any other congeneric pair of tortoise species. The shallow mitochondrial divergences of the two radiations on the Bahamas and the Galápagos Islands suggest that each archipelago sustained only one species of tortoise, and that the taxa currently regarded as distinct species in the Galápagos should be returned to subspecies status. The extinct tortoises from the Bahamas have two well-supported clades: the first includes one sample from Great Abaco and two from Crooked Island; the second clade includes tortoises from Great Abaco, Eleuthera, Crooked Island, Mayaguana, Middle Caicos, and Grand Turk. Tortoises belonging to both clades on Great Abaco and Crooked Island suggest late Holocene inter-island transport by prehistoric humans.Christian KehlmaierNancy A. AlburyDavid W. SteadmanEva GraciáRichard FranzUwe FritzNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christian Kehlmaier Nancy A. Albury David W. Steadman Eva Graciá Richard Franz Uwe Fritz Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
description	Abstract We present 10 nearly complete mitochondrial genomes of the extinct tortoise Chelonoidis alburyorum from the Bahamas. While our samples represent morphologically distinct populations from six islands, their genetic divergences were shallow and resembled those among Galápagos tortoises. Our molecular clock estimates revealed that divergence among Bahamian tortoises began ~ 1.5 mya, whereas divergence among the Galápagos tortoises (C. niger complex) began ~ 2 mya. The inter-island divergences of tortoises from within the Bahamas and within the Galápagos Islands are much younger (0.09–0.59 mya, and 0.08–1.43 mya, respectively) than the genetic differentiation between any other congeneric pair of tortoise species. The shallow mitochondrial divergences of the two radiations on the Bahamas and the Galápagos Islands suggest that each archipelago sustained only one species of tortoise, and that the taxa currently regarded as distinct species in the Galápagos should be returned to subspecies status. The extinct tortoises from the Bahamas have two well-supported clades: the first includes one sample from Great Abaco and two from Crooked Island; the second clade includes tortoises from Great Abaco, Eleuthera, Crooked Island, Mayaguana, Middle Caicos, and Grand Turk. Tortoises belonging to both clades on Great Abaco and Crooked Island suggest late Holocene inter-island transport by prehistoric humans.
format	article
author	Christian Kehlmaier Nancy A. Albury David W. Steadman Eva Graciá Richard Franz Uwe Fritz
author_facet	Christian Kehlmaier Nancy A. Albury David W. Steadman Eva Graciá Richard Franz Uwe Fritz
author_sort	Christian Kehlmaier
title	Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
title_short	Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
title_full	Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
title_fullStr	Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
title_full_unstemmed	Ancient mitogenomics elucidates diversity of extinct West Indian tortoises
title_sort	ancient mitogenomics elucidates diversity of extinct west indian tortoises
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/80e9be9a03db44139ccb8dff41c32d05
work_keys_str_mv	AT christiankehlmaier ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises AT nancyaalbury ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises AT davidwsteadman ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises AT evagracia ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises AT richardfranz ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises AT uwefritz ancientmitogenomicselucidatesdiversityofextinctwestindiantortoises
_version_	1718391321340674048

Ancient mitogenomics elucidates diversity of extinct West Indian tortoises

Ejemplares similares