Comparative genetic structure in pines: evolutionary and conservation consequences

Pines have been the focus of several studies that estimate population genetic parameters using both allozymes and chloroplast single sequence repeats (SSRs). Also, the genus has also been recently studied using molecular systematics so that we now have a more clear understanding of their evolutionar...

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Autores principales:	DELGADO,PATRICIA, CUENCA,ARGELIA, ESCALANTE,ANA E., MOLINA-FREANER,FRANCISCO, PIÑERO,DANIEL
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2002
Materias:	Pinus genetic structure outcrossing rates microsatellites allozymes
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100004
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spelling	oai:scielo:S0716-078X20020001000042002-06-14Comparative genetic structure in pines: evolutionary and conservation consequencesDELGADO,PATRICIACUENCA,ARGELIAESCALANTE,ANA E.MOLINA-FREANER,FRANCISCOPIÑERO,DANIEL Pinus genetic structure outcrossing rates microsatellites allozymes Pines have been the focus of several studies that estimate population genetic parameters using both allozymes and chloroplast single sequence repeats (SSRs). Also, the genus has also been recently studied using molecular systematics so that we now have a more clear understanding of their evolutionary history. With this background we studied comparatively the genetic structure in pines. Expected heterozygosity is particularly constant with a 99 % confidence interval between 0.19 and 0.23 in species that have been studied until now using allozymes. There is a significant proportion of species (9/41) that show high population differentiation estimates (Fst = or larger than 0.15) and five of these have large and wingless seeds probably associated with low densities, bird dispersal mechanisms and resistance to water stress. These species include the North American pinyon pines. Outcrossing rates are also constant among species from both subgenus Pinus and subgenus Strobus, which probably reflects a selective limit to the amount of deleterious alleles that can be maintained in pine species and this also affects inbreeding levels. We also explored the data published using microsatellites in pines and conclude that these markers uncover a higher proportion of variation and genetic differentiation as expected and that the evolutionary models that are used to derive the population genetic structure estimators should take into account other sources of mutation (point mutations, larger insertions and or deletions and duplications) to better understand the comparative applications of these molecular markersinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.75 n.1 20022002-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100004en10.4067/S0716-078X2002000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pinus genetic structure outcrossing rates microsatellites allozymes
spellingShingle	Pinus genetic structure outcrossing rates microsatellites allozymes DELGADO,PATRICIA CUENCA,ARGELIA ESCALANTE,ANA E. MOLINA-FREANER,FRANCISCO PIÑERO,DANIEL Comparative genetic structure in pines: evolutionary and conservation consequences
description	Pines have been the focus of several studies that estimate population genetic parameters using both allozymes and chloroplast single sequence repeats (SSRs). Also, the genus has also been recently studied using molecular systematics so that we now have a more clear understanding of their evolutionary history. With this background we studied comparatively the genetic structure in pines. Expected heterozygosity is particularly constant with a 99 % confidence interval between 0.19 and 0.23 in species that have been studied until now using allozymes. There is a significant proportion of species (9/41) that show high population differentiation estimates (Fst = or larger than 0.15) and five of these have large and wingless seeds probably associated with low densities, bird dispersal mechanisms and resistance to water stress. These species include the North American pinyon pines. Outcrossing rates are also constant among species from both subgenus Pinus and subgenus Strobus, which probably reflects a selective limit to the amount of deleterious alleles that can be maintained in pine species and this also affects inbreeding levels. We also explored the data published using microsatellites in pines and conclude that these markers uncover a higher proportion of variation and genetic differentiation as expected and that the evolutionary models that are used to derive the population genetic structure estimators should take into account other sources of mutation (point mutations, larger insertions and or deletions and duplications) to better understand the comparative applications of these molecular markers
author	DELGADO,PATRICIA CUENCA,ARGELIA ESCALANTE,ANA E. MOLINA-FREANER,FRANCISCO PIÑERO,DANIEL
author_facet	DELGADO,PATRICIA CUENCA,ARGELIA ESCALANTE,ANA E. MOLINA-FREANER,FRANCISCO PIÑERO,DANIEL
author_sort	DELGADO,PATRICIA
title	Comparative genetic structure in pines: evolutionary and conservation consequences
title_short	Comparative genetic structure in pines: evolutionary and conservation consequences
title_full	Comparative genetic structure in pines: evolutionary and conservation consequences
title_fullStr	Comparative genetic structure in pines: evolutionary and conservation consequences
title_full_unstemmed	Comparative genetic structure in pines: evolutionary and conservation consequences
title_sort	comparative genetic structure in pines: evolutionary and conservation consequences
publisher	Sociedad de Biología de Chile
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100004
work_keys_str_mv	AT delgadopatricia comparativegeneticstructureinpinesevolutionaryandconservationconsequences AT cuencaargelia comparativegeneticstructureinpinesevolutionaryandconservationconsequences AT escalanteanae comparativegeneticstructureinpinesevolutionaryandconservationconsequences AT molinafreanerfrancisco comparativegeneticstructureinpinesevolutionaryandconservationconsequences AT pinerodaniel comparativegeneticstructureinpinesevolutionaryandconservationconsequences
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Comparative genetic structure in pines: evolutionary and conservation consequences

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