Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)

Random Amplified Polymorphic DNA(RAPD)markers were used to assess the genetic diversity of 587 individuals, belonging to 22 populations of Nothofagus nervosa that were distributed through the Coastal (38°S to 41 °S) and Andes Mountains in Central-Southern Chile (36°S to 40°S). The objective of this...

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Autores principales:	Carrasco,Basilio, Garnier,Maurice, Eaton,Lafayette, Guevara,Rafael, Carú,Margarita
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2009
Materias:	Genetic structure Nothofagus RAPD markers
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200007
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spelling	oai:scielo:S0718-162020090002000072009-09-01Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)Carrasco,BasilioGarnier,MauriceEaton,LafayetteGuevara,RafaelCarú,Margarita Genetic structure Nothofagus RAPD markers Random Amplified Polymorphic DNA(RAPD)markers were used to assess the genetic diversity of 587 individuals, belonging to 22 populations of Nothofagus nervosa that were distributed through the Coastal (38°S to 41 °S) and Andes Mountains in Central-Southern Chile (36°S to 40°S). The objective of this study was to complement the genetic inferences previously determined by isozyme analysis, in order to obtain more accurate genetic diversity estimations. We scored 81.8% of the polymorphic loci of the samples tested. The average incidence of genetic polymorphism within populations was high, with values ranging between 33% and 63%. Analysis of molecular variance (AMOVA) showed most of the genetic variation was distributed within populations (87.6%), but FST values (FST = 0.124; p< 0.00001) indicated that there was also a significant difference among populations. A discriminant analysis revealed three geographically defined groups and showed that 14 loci explained 87.2% of the genetic differentiation among N. nervosa populations. Watterson's neutrality test and Ohta's two-locus analysis of linkage disequilibrium (LD) both suggested that stochastic demographic and environmental factors can partially explain the loci variation observed in the RAPDs. The role of the last glaciations, as well as some conservation and breeding strategies, may have influenced current genetic variation and fragmentation in this species.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.36 n.2 20092009-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200007en10.4067/S0718-16202009000200007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Genetic structure Nothofagus RAPD markers
spellingShingle	Genetic structure Nothofagus RAPD markers Carrasco,Basilio Garnier,Maurice Eaton,Lafayette Guevara,Rafael Carú,Margarita Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
description	Random Amplified Polymorphic DNA(RAPD)markers were used to assess the genetic diversity of 587 individuals, belonging to 22 populations of Nothofagus nervosa that were distributed through the Coastal (38°S to 41 °S) and Andes Mountains in Central-Southern Chile (36°S to 40°S). The objective of this study was to complement the genetic inferences previously determined by isozyme analysis, in order to obtain more accurate genetic diversity estimations. We scored 81.8% of the polymorphic loci of the samples tested. The average incidence of genetic polymorphism within populations was high, with values ranging between 33% and 63%. Analysis of molecular variance (AMOVA) showed most of the genetic variation was distributed within populations (87.6%), but FST values (FST = 0.124; p< 0.00001) indicated that there was also a significant difference among populations. A discriminant analysis revealed three geographically defined groups and showed that 14 loci explained 87.2% of the genetic differentiation among N. nervosa populations. Watterson's neutrality test and Ohta's two-locus analysis of linkage disequilibrium (LD) both suggested that stochastic demographic and environmental factors can partially explain the loci variation observed in the RAPDs. The role of the last glaciations, as well as some conservation and breeding strategies, may have influenced current genetic variation and fragmentation in this species.
author	Carrasco,Basilio Garnier,Maurice Eaton,Lafayette Guevara,Rafael Carú,Margarita
author_facet	Carrasco,Basilio Garnier,Maurice Eaton,Lafayette Guevara,Rafael Carú,Margarita
author_sort	Carrasco,Basilio
title	Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
title_short	Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
title_full	Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
title_fullStr	Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
title_full_unstemmed	Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)
title_sort	proximal causes of genetic variation between and within populations of rauli (nothofagus nervosa)
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200007
work_keys_str_mv	AT carrascobasilio proximalcausesofgeneticvariationbetweenandwithinpopulationsofraulinothofagusnervosa AT garniermaurice proximalcausesofgeneticvariationbetweenandwithinpopulationsofraulinothofagusnervosa AT eatonlafayette proximalcausesofgeneticvariationbetweenandwithinpopulationsofraulinothofagusnervosa AT guevararafael proximalcausesofgeneticvariationbetweenandwithinpopulationsofraulinothofagusnervosa AT carumargarita proximalcausesofgeneticvariationbetweenandwithinpopulationsofraulinothofagusnervosa
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Proximal causes of genetic variation between and within populations of rauli (Nothofagus nervosa)

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