Crater Lake Apoyo revisited--population genetics of an emerging species flock.

The polytypic Nicaraguan Midas cichlids (Amphilophus cf. citrinellus) have been established as a model system for studying the mechanisms of speciation and patterns of diversification in allopatry and sympatry. The species assemblage in Crater Lake Apoyo has been accepted as a textbook example for s...

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Autores principales:	Matthias F Geiger, Jeffrey K McCrary, Ulrich K Schliewen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b0f3119c4d8541a8abf3114a553f7d8b
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spelling	oai:doaj.org-article:b0f3119c4d8541a8abf3114a553f7d8b2021-11-18T08:54:06ZCrater Lake Apoyo revisited--population genetics of an emerging species flock.1932-620310.1371/journal.pone.0074901https://doaj.org/article/b0f3119c4d8541a8abf3114a553f7d8b2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24086393/?tool=EBIhttps://doaj.org/toc/1932-6203The polytypic Nicaraguan Midas cichlids (Amphilophus cf. citrinellus) have been established as a model system for studying the mechanisms of speciation and patterns of diversification in allopatry and sympatry. The species assemblage in Crater Lake Apoyo has been accepted as a textbook example for sympatric speciation. Here, we present a first comprehensive data set of population genetic (mtDNA & AFLPs) proxies of species level differentiation for a representative set of individuals of all six endemic Amphilophus species occurring in Crater Lake Apoyo. AFLP genetic differentiation was partitioned into a neutral and non-neutral component based on outlier-loci detection approaches, and patterns of species divergence were explored with Bayesian clustering methods. Substantial levels of admixture between species were detected, indicating different levels of reproductive isolation between the six species. Analysis of neutral genetic variation revealed several A. zaliosus as being introgressed by an unknown contributor, hereby rendering the sympatrically evolving L. Apoyo flock polyphyletic. This is contrasted by the mtDNA analysis delivering a clear monophyly signal with Crater Lake Apoyo private haplotypes characterising all six described species, but also demonstrating different demographic histories as inferred from pairwise mismatch distributions.Matthias F GeigerJeffrey K McCraryUlrich K SchliewenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 9, p e74901 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Matthias F Geiger Jeffrey K McCrary Ulrich K Schliewen Crater Lake Apoyo revisited--population genetics of an emerging species flock.
description	The polytypic Nicaraguan Midas cichlids (Amphilophus cf. citrinellus) have been established as a model system for studying the mechanisms of speciation and patterns of diversification in allopatry and sympatry. The species assemblage in Crater Lake Apoyo has been accepted as a textbook example for sympatric speciation. Here, we present a first comprehensive data set of population genetic (mtDNA & AFLPs) proxies of species level differentiation for a representative set of individuals of all six endemic Amphilophus species occurring in Crater Lake Apoyo. AFLP genetic differentiation was partitioned into a neutral and non-neutral component based on outlier-loci detection approaches, and patterns of species divergence were explored with Bayesian clustering methods. Substantial levels of admixture between species were detected, indicating different levels of reproductive isolation between the six species. Analysis of neutral genetic variation revealed several A. zaliosus as being introgressed by an unknown contributor, hereby rendering the sympatrically evolving L. Apoyo flock polyphyletic. This is contrasted by the mtDNA analysis delivering a clear monophyly signal with Crater Lake Apoyo private haplotypes characterising all six described species, but also demonstrating different demographic histories as inferred from pairwise mismatch distributions.
format	article
author	Matthias F Geiger Jeffrey K McCrary Ulrich K Schliewen
author_facet	Matthias F Geiger Jeffrey K McCrary Ulrich K Schliewen
author_sort	Matthias F Geiger
title	Crater Lake Apoyo revisited--population genetics of an emerging species flock.
title_short	Crater Lake Apoyo revisited--population genetics of an emerging species flock.
title_full	Crater Lake Apoyo revisited--population genetics of an emerging species flock.
title_fullStr	Crater Lake Apoyo revisited--population genetics of an emerging species flock.
title_full_unstemmed	Crater Lake Apoyo revisited--population genetics of an emerging species flock.
title_sort	crater lake apoyo revisited--population genetics of an emerging species flock.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/b0f3119c4d8541a8abf3114a553f7d8b
work_keys_str_mv	AT matthiasfgeiger craterlakeapoyorevisitedpopulationgeneticsofanemergingspeciesflock AT jeffreykmccrary craterlakeapoyorevisitedpopulationgeneticsofanemergingspeciesflock AT ulrichkschliewen craterlakeapoyorevisitedpopulationgeneticsofanemergingspeciesflock
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Crater Lake Apoyo revisited--population genetics of an emerging species flock.

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