Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene

Sister species separated by the Isthmus of Panama have been used to estimate the rate of molecular evolution. A molecular clock calibrated with a well studied geological event can be useful to propose evolutionary history hypotheses. The Isthmus of Panama emerged completely 3.1 million years ago (my...

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Autores principales:	García-Ríos,Cedar I., Pérez-Pérez,Nivette M., Fernández-López,Joanne, Fuentes,Francisco A.
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2014
Materias:	Isthmus of Panama molecular clock COI Stenoplax Acanthochitona
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000200003
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spelling	oai:scielo:S0718-195720140002000032014-12-10Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I geneGarcía-Ríos,Cedar I.Pérez-Pérez,Nivette M.Fernández-López,JoanneFuentes,Francisco A. Isthmus of Panama molecular clock COI Stenoplax Acanthochitona Sister species separated by the Isthmus of Panama have been used to estimate the rate of molecular evolution. A molecular clock calibrated with a well studied geological event can be useful to propose evolutionary history hypotheses. The Isthmus of Panama emerged completely 3.1 million years ago (mya), but fossil evidence has shown that rocky shore and reef mollusks communities were isolated early (5.1-10.1 mya). The divergence of segments of the mitochondrial gene cytochrome oxidase I (COI) was determined for 2 pairs of sister species of chitons. The pair Stenoplax purpurascens of the Caribbean and S. limaciformis of the tropical Eastern Pacific consists of phenotypically similar species. The species of the second pair, Acanthochitona rhodea from the south of the Caribbean and A. ferreirai of the Panama and Costa Rica Pacific coast, were treated as the same species until the recent description of A. ferreirai. Homologous fragments of the COI gene were compared using specimens collected on both coasts of Costa Rica. For the Stenoplax genus pair, a total divergence of 11.4% base pairs (bp) was determined. The Acanthochitona pair showed a divergence of 10.4-10.5% bp. These values allow calculated divergence rates from 3.7% / mya (3.1 mya isolation) to 1.1% / mya (early isolation). This is the first calibration of the COI as a molecular clock for the polyplacophora.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.49 n.2 20142014-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000200003en10.4067/S0718-19572014000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Isthmus of Panama molecular clock COI Stenoplax Acanthochitona
spellingShingle	Isthmus of Panama molecular clock COI Stenoplax Acanthochitona García-Ríos,Cedar I. Pérez-Pérez,Nivette M. Fernández-López,Joanne Fuentes,Francisco A. Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
description	Sister species separated by the Isthmus of Panama have been used to estimate the rate of molecular evolution. A molecular clock calibrated with a well studied geological event can be useful to propose evolutionary history hypotheses. The Isthmus of Panama emerged completely 3.1 million years ago (mya), but fossil evidence has shown that rocky shore and reef mollusks communities were isolated early (5.1-10.1 mya). The divergence of segments of the mitochondrial gene cytochrome oxidase I (COI) was determined for 2 pairs of sister species of chitons. The pair Stenoplax purpurascens of the Caribbean and S. limaciformis of the tropical Eastern Pacific consists of phenotypically similar species. The species of the second pair, Acanthochitona rhodea from the south of the Caribbean and A. ferreirai of the Panama and Costa Rica Pacific coast, were treated as the same species until the recent description of A. ferreirai. Homologous fragments of the COI gene were compared using specimens collected on both coasts of Costa Rica. For the Stenoplax genus pair, a total divergence of 11.4% base pairs (bp) was determined. The Acanthochitona pair showed a divergence of 10.4-10.5% bp. These values allow calculated divergence rates from 3.7% / mya (3.1 mya isolation) to 1.1% / mya (early isolation). This is the first calibration of the COI as a molecular clock for the polyplacophora.
author	García-Ríos,Cedar I. Pérez-Pérez,Nivette M. Fernández-López,Joanne Fuentes,Francisco A.
author_facet	García-Ríos,Cedar I. Pérez-Pérez,Nivette M. Fernández-López,Joanne Fuentes,Francisco A.
author_sort	García-Ríos,Cedar I.
title	Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
title_short	Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
title_full	Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
title_fullStr	Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
title_full_unstemmed	Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene
title_sort	calibrating the chitons (mollusca: polyplacophora) molecular clock with the mitochondrial dna cytochrome c oxidase i gene
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000200003
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Calibrating the chitons (Mollusca: Polyplacophora) molecular clock with the mitochondrial DNA cytochrome C oxidase I gene

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