Environmental variables explain genetic structure in a beetle-associated nematode.

The distribution of a species is a complex expression of its ecological and evolutionary history and integrating population genetic, environmental, and ecological data can provide new insights into the effects of the environment on the population structure of species. Previous work demonstrated stro...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Angela McGaughran, Katy Morgan, Ralf J Sommer
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/89b7cba4fc1d4126bb6b1b7a24eb0c40
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:89b7cba4fc1d4126bb6b1b7a24eb0c40
record_format	dspace
spelling	oai:doaj.org-article:89b7cba4fc1d4126bb6b1b7a24eb0c402021-11-18T08:34:35ZEnvironmental variables explain genetic structure in a beetle-associated nematode.1932-620310.1371/journal.pone.0087317https://doaj.org/article/89b7cba4fc1d4126bb6b1b7a24eb0c402014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24498073/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The distribution of a species is a complex expression of its ecological and evolutionary history and integrating population genetic, environmental, and ecological data can provide new insights into the effects of the environment on the population structure of species. Previous work demonstrated strong patterns of genetic differentiation in natural populations of the hermaphroditic nematode Pristionchus pacificus in its La Réunion Island habitat, but gave no clear understanding of the role of the environment in structuring this variation. Here, we present what is to our knowledge the first study to statistically evaluate the role of the environment in shaping the structure and distribution of nematode populations. We test the hypothesis that genetic structure in P. pacificus is influenced by environmental variables, by combining population genetic analyses of microsatellite data from 18 populations and 370 strains, with multivariate statistics on environmental data, and species distribution modelling. We assess and quantify the relative importance of environmental factors (geographic distance, altitude, temperature, precipitation, and beetle host) on genetic variation among populations. Despite the fact that geographic populations of P. pacificus comprise vast genetic diversity sourced from multiple ancestral lineages, we find strong evidence for local associations between environment and genetic variation. Further, we show that significantly more genetic variation in P. pacificus populations is explained by environmental variation than by geographic distances. This supports a strong role for environmental heterogeneity vs. genetic drift in the divergence of populations, which we suggest may be influenced by adaptive forces.Angela McGaughranKaty MorganRalf J SommerPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e87317 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Angela McGaughran Katy Morgan Ralf J Sommer Environmental variables explain genetic structure in a beetle-associated nematode.
description	The distribution of a species is a complex expression of its ecological and evolutionary history and integrating population genetic, environmental, and ecological data can provide new insights into the effects of the environment on the population structure of species. Previous work demonstrated strong patterns of genetic differentiation in natural populations of the hermaphroditic nematode Pristionchus pacificus in its La Réunion Island habitat, but gave no clear understanding of the role of the environment in structuring this variation. Here, we present what is to our knowledge the first study to statistically evaluate the role of the environment in shaping the structure and distribution of nematode populations. We test the hypothesis that genetic structure in P. pacificus is influenced by environmental variables, by combining population genetic analyses of microsatellite data from 18 populations and 370 strains, with multivariate statistics on environmental data, and species distribution modelling. We assess and quantify the relative importance of environmental factors (geographic distance, altitude, temperature, precipitation, and beetle host) on genetic variation among populations. Despite the fact that geographic populations of P. pacificus comprise vast genetic diversity sourced from multiple ancestral lineages, we find strong evidence for local associations between environment and genetic variation. Further, we show that significantly more genetic variation in P. pacificus populations is explained by environmental variation than by geographic distances. This supports a strong role for environmental heterogeneity vs. genetic drift in the divergence of populations, which we suggest may be influenced by adaptive forces.
format	article
author	Angela McGaughran Katy Morgan Ralf J Sommer
author_facet	Angela McGaughran Katy Morgan Ralf J Sommer
author_sort	Angela McGaughran
title	Environmental variables explain genetic structure in a beetle-associated nematode.
title_short	Environmental variables explain genetic structure in a beetle-associated nematode.
title_full	Environmental variables explain genetic structure in a beetle-associated nematode.
title_fullStr	Environmental variables explain genetic structure in a beetle-associated nematode.
title_full_unstemmed	Environmental variables explain genetic structure in a beetle-associated nematode.
title_sort	environmental variables explain genetic structure in a beetle-associated nematode.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/89b7cba4fc1d4126bb6b1b7a24eb0c40
work_keys_str_mv	AT angelamcgaughran environmentalvariablesexplaingeneticstructureinabeetleassociatednematode AT katymorgan environmentalvariablesexplaingeneticstructureinabeetleassociatednematode AT ralfjsommer environmentalvariablesexplaingeneticstructureinabeetleassociatednematode
_version_	1718421632951779328

Environmental variables explain genetic structure in a beetle-associated nematode.

Ejemplares similares