Isolation by distance and stochastic migration in a fragmented population of Prosopis alba

PREMISE OF THE STUDY: Gene flow through dispersal of seeds and pollen is a fundamental determinant of spatial genetic structure (SGS) in natural populations of trees at different spatial scales. Within continuous populations, restrictions to gene flow should be manifested in a process of local genet...

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Autores principales:	Roser, Leandro Gabriel, Ferreyra, Laura Inés, Vilardi, Juan Cesar, Saidman, Beatriz Ofelia
Publicado:	2017
Materias:	Fabaceae Isolation by distance Kinship Landscape genetics Microsatellites Prosopis alba Spatial genetic structure Stochastic migration gene flow genetic differentiation genetic marker genetic structure genetics habitat fragmentation isolated population kinship landscape ecology migration seed dispersal spatial variation stochasticity tree microsatellite DNA Argentina DNA sequence ecosystem gene frequency genetic variation geography growth, development and aging Markov chain pollen population dynamics population genetics Prosopis reproductive isolation Ecosystem Gene Flow Gene Frequency Genetic Variation Genetics, Population Geography Microsatellite Repeats Pollen Population Dynamics Reproductive Isolation Seed Dispersal Sequence Analysis, DNA Stochastic Processes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v104_n2_p313_Roser http://hdl.handle.net/20.500.12110/paper_00029122_v104_n2_p313_Roser
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00029122_v104_n2_p313_Roser
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spelling	paper:paper_00029122_v104_n2_p313_Roser2023-06-08T14:23:00Z Isolation by distance and stochastic migration in a fragmented population of Prosopis alba Roser, Leandro Gabriel Ferreyra, Laura Inés Vilardi, Juan Cesar Saidman, Beatriz Ofelia Fabaceae Isolation by distance Kinship Landscape genetics Microsatellites Prosopis alba Spatial genetic structure Stochastic migration gene flow genetic differentiation genetic marker genetic structure genetics habitat fragmentation isolated population kinship landscape ecology migration seed dispersal spatial variation stochasticity tree Fabaceae Prosopis alba microsatellite DNA Argentina DNA sequence ecosystem gene flow gene frequency genetic variation genetics geography growth, development and aging Markov chain pollen population dynamics population genetics Prosopis reproductive isolation seed dispersal Argentina Ecosystem Gene Flow Gene Frequency Genetic Variation Genetics, Population Geography Microsatellite Repeats Pollen Population Dynamics Prosopis Reproductive Isolation Seed Dispersal Sequence Analysis, DNA Stochastic Processes PREMISE OF THE STUDY: Gene flow through dispersal of seeds and pollen is a fundamental determinant of spatial genetic structure (SGS) in natural populations of trees at different spatial scales. Within continuous populations, restrictions to gene flow should be manifested in a process of local genetic differentiation, known as isolation by distance. The present work examines the SGS of a Prosopis alba population in a patchy region where urban, forest, and agricultural areas coexist. The analysis discussed here expands our knowledge about the processes affecting the distribution of the genetic variability in populations of disturbed landscapes. METHODS: Three sites with different landscape and demographic characteristics were analyzed. Seven highly variable microsatellite markers were used to survey the relevance of both isolation by distance and stochastic migration in the SGS of the population. KEY RESULTS: The analyses showed that (1) the genetic similarity declined with increasing geographic distance, (2) the population may be conceived as a single genetically continuous unit showing spatial differentiation as consequence of isolation by distance, rather than a structured population following the island model, and (3) there is evidence supporting a past immigration event into one of the study sites, which promoted a local pattern of genetic structure. CONCLUSIONS: These results indicate that in spite of the population fragmentation produced by land-use changes, P. alba maintains the genetic cohesion and a continuous genetic structure in the analyzed area. © 2017 Botanical Society of America. Fil:Roser, L.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferreyra, L.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilardi, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Saidman, B.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v104_n2_p313_Roser http://hdl.handle.net/20.500.12110/paper_00029122_v104_n2_p313_Roser
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Fabaceae Isolation by distance Kinship Landscape genetics Microsatellites Prosopis alba Spatial genetic structure Stochastic migration gene flow genetic differentiation genetic marker genetic structure genetics habitat fragmentation isolated population kinship landscape ecology migration seed dispersal spatial variation stochasticity tree Fabaceae Prosopis alba microsatellite DNA Argentina DNA sequence ecosystem gene flow gene frequency genetic variation genetics geography growth, development and aging Markov chain pollen population dynamics population genetics Prosopis reproductive isolation seed dispersal Argentina Ecosystem Gene Flow Gene Frequency Genetic Variation Genetics, Population Geography Microsatellite Repeats Pollen Population Dynamics Prosopis Reproductive Isolation Seed Dispersal Sequence Analysis, DNA Stochastic Processes
spellingShingle	Fabaceae Isolation by distance Kinship Landscape genetics Microsatellites Prosopis alba Spatial genetic structure Stochastic migration gene flow genetic differentiation genetic marker genetic structure genetics habitat fragmentation isolated population kinship landscape ecology migration seed dispersal spatial variation stochasticity tree Fabaceae Prosopis alba microsatellite DNA Argentina DNA sequence ecosystem gene flow gene frequency genetic variation genetics geography growth, development and aging Markov chain pollen population dynamics population genetics Prosopis reproductive isolation seed dispersal Argentina Ecosystem Gene Flow Gene Frequency Genetic Variation Genetics, Population Geography Microsatellite Repeats Pollen Population Dynamics Prosopis Reproductive Isolation Seed Dispersal Sequence Analysis, DNA Stochastic Processes Roser, Leandro Gabriel Ferreyra, Laura Inés Vilardi, Juan Cesar Saidman, Beatriz Ofelia Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
topic_facet	Fabaceae Isolation by distance Kinship Landscape genetics Microsatellites Prosopis alba Spatial genetic structure Stochastic migration gene flow genetic differentiation genetic marker genetic structure genetics habitat fragmentation isolated population kinship landscape ecology migration seed dispersal spatial variation stochasticity tree Fabaceae Prosopis alba microsatellite DNA Argentina DNA sequence ecosystem gene flow gene frequency genetic variation genetics geography growth, development and aging Markov chain pollen population dynamics population genetics Prosopis reproductive isolation seed dispersal Argentina Ecosystem Gene Flow Gene Frequency Genetic Variation Genetics, Population Geography Microsatellite Repeats Pollen Population Dynamics Prosopis Reproductive Isolation Seed Dispersal Sequence Analysis, DNA Stochastic Processes
description	PREMISE OF THE STUDY: Gene flow through dispersal of seeds and pollen is a fundamental determinant of spatial genetic structure (SGS) in natural populations of trees at different spatial scales. Within continuous populations, restrictions to gene flow should be manifested in a process of local genetic differentiation, known as isolation by distance. The present work examines the SGS of a Prosopis alba population in a patchy region where urban, forest, and agricultural areas coexist. The analysis discussed here expands our knowledge about the processes affecting the distribution of the genetic variability in populations of disturbed landscapes. METHODS: Three sites with different landscape and demographic characteristics were analyzed. Seven highly variable microsatellite markers were used to survey the relevance of both isolation by distance and stochastic migration in the SGS of the population. KEY RESULTS: The analyses showed that (1) the genetic similarity declined with increasing geographic distance, (2) the population may be conceived as a single genetically continuous unit showing spatial differentiation as consequence of isolation by distance, rather than a structured population following the island model, and (3) there is evidence supporting a past immigration event into one of the study sites, which promoted a local pattern of genetic structure. CONCLUSIONS: These results indicate that in spite of the population fragmentation produced by land-use changes, P. alba maintains the genetic cohesion and a continuous genetic structure in the analyzed area. © 2017 Botanical Society of America.
author	Roser, Leandro Gabriel Ferreyra, Laura Inés Vilardi, Juan Cesar Saidman, Beatriz Ofelia
author_facet	Roser, Leandro Gabriel Ferreyra, Laura Inés Vilardi, Juan Cesar Saidman, Beatriz Ofelia
author_sort	Roser, Leandro Gabriel
title	Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
title_short	Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
title_full	Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
title_fullStr	Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
title_full_unstemmed	Isolation by distance and stochastic migration in a fragmented population of Prosopis alba
title_sort	isolation by distance and stochastic migration in a fragmented population of prosopis alba
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v104_n2_p313_Roser http://hdl.handle.net/20.500.12110/paper_00029122_v104_n2_p313_Roser
work_keys_str_mv	AT roserleandrogabriel isolationbydistanceandstochasticmigrationinafragmentedpopulationofprosopisalba AT ferreyralauraines isolationbydistanceandstochasticmigrationinafragmentedpopulationofprosopisalba AT vilardijuancesar isolationbydistanceandstochasticmigrationinafragmentedpopulationofprosopisalba AT saidmanbeatrizofelia isolationbydistanceandstochasticmigrationinafragmentedpopulationofprosopisalba
_version_	1768545811517407232

Isolation by distance and stochastic migration in a fragmented population of Prosopis alba

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