Landscape genetic structure of natural populations of Acacia caven in Argentina

Acacia caven is a South American species which shows remarkable climate tolerance and ecological adaptability; as such, this species is suitable for colonizing anthropogenically degraded sites. This species is widely distributed, and six varieties have been described based on both morphological trai...

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Autores principales: Pometti, Carolina Luciana, Bessega, Cecilia Fabiana, Vilardi, Juan Cesar, Saidman, Beatriz Ofelia
Publicado: 2012
Materias:
Acacia caven
AFLP
Eco-regions
Genetic structure
Natural populations
Varieties
Acacia
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n4_p911_Pometti
http://hdl.handle.net/20.500.12110/paper_16142942_v8_n4_p911_Pometti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_16142942_v8_n4_p911_Pometti
record_format dspace
spelling paper:paper_16142942_v8_n4_p911_Pometti2023-06-08T16:25:20Z Landscape genetic structure of natural populations of Acacia caven in Argentina Pometti, Carolina Luciana Bessega, Cecilia Fabiana Vilardi, Juan Cesar Saidman, Beatriz Ofelia Acacia caven AFLP Eco-regions Genetic structure Natural populations Varieties Acacia Acacia caven Acacia caven is a South American species which shows remarkable climate tolerance and ecological adaptability; as such, this species is suitable for colonizing anthropogenically degraded sites. This species is widely distributed, and six varieties have been described based on both morphological traits and molecular markers. Moreover, Aronson (1992) suggests that, for this species, geographical separation could be associated with ecological differentiation. In this study, amplified fragment length polymorphisms were used to study genetic variation within and among 15 populations of A. caven from five eco-regions of Argentina and to investigate (1) whether the varieties are genetically coherent, (2) whether the varieties correspond consistently to a single eco-region, (3) the proportion of the species diversity explained within and among varieties and eco-regions. Eight of the 225 bands appear to be under positive selection. The remaining 217 neutral loci showed a high percentage of polymorphism (99. 1%). The estimates of genetic diversity H j were generally high. The F ST (0. 315) was highly significant, providing evidence for genetic structure among populations. Hierarchical analysis of molecular variance indicated that variation among eco-regions was 8. 2% and highly significant. The higher component of variance was found within populations (67. 5%). STRUCTURE analysis suggested that the optimal number of K = 11. The results showed that, in most cases, geographic separation is associated with ecological differentiation. Since differentiation of A. caven populations studied here in eco-regions was highly significant, sampling should include a large number of trees within populations as well as covering the wide ecological diversity of the species. © 2012 Springer-Verlag. Fil:Pometti, C.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bessega, C.F. 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n4_p911_Pometti http://hdl.handle.net/20.500.12110/paper_16142942_v8_n4_p911_Pometti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Acacia caven
AFLP
Eco-regions
Genetic structure
Natural populations
Varieties
Acacia
Acacia caven
spellingShingle Acacia caven
AFLP
Eco-regions
Genetic structure
Natural populations
Varieties
Acacia
Acacia caven
Pometti, Carolina Luciana
Bessega, Cecilia Fabiana
Vilardi, Juan Cesar
Saidman, Beatriz Ofelia
Landscape genetic structure of natural populations of Acacia caven in Argentina
topic_facet Acacia caven
AFLP
Eco-regions
Genetic structure
Natural populations
Varieties
Acacia
Acacia caven
description Acacia caven is a South American species which shows remarkable climate tolerance and ecological adaptability; as such, this species is suitable for colonizing anthropogenically degraded sites. This species is widely distributed, and six varieties have been described based on both morphological traits and molecular markers. Moreover, Aronson (1992) suggests that, for this species, geographical separation could be associated with ecological differentiation. In this study, amplified fragment length polymorphisms were used to study genetic variation within and among 15 populations of A. caven from five eco-regions of Argentina and to investigate (1) whether the varieties are genetically coherent, (2) whether the varieties correspond consistently to a single eco-region, (3) the proportion of the species diversity explained within and among varieties and eco-regions. Eight of the 225 bands appear to be under positive selection. The remaining 217 neutral loci showed a high percentage of polymorphism (99. 1%). The estimates of genetic diversity H j were generally high. The F ST (0. 315) was highly significant, providing evidence for genetic structure among populations. Hierarchical analysis of molecular variance indicated that variation among eco-regions was 8. 2% and highly significant. The higher component of variance was found within populations (67. 5%). STRUCTURE analysis suggested that the optimal number of K = 11. The results showed that, in most cases, geographic separation is associated with ecological differentiation. Since differentiation of A. caven populations studied here in eco-regions was highly significant, sampling should include a large number of trees within populations as well as covering the wide ecological diversity of the species. © 2012 Springer-Verlag.
author Pometti, Carolina Luciana
Bessega, Cecilia Fabiana
Vilardi, Juan Cesar
Saidman, Beatriz Ofelia
author_facet Pometti, Carolina Luciana
Bessega, Cecilia Fabiana
Vilardi, Juan Cesar
Saidman, Beatriz Ofelia
author_sort Pometti, Carolina Luciana
title Landscape genetic structure of natural populations of Acacia caven in Argentina
title_short Landscape genetic structure of natural populations of Acacia caven in Argentina
title_full Landscape genetic structure of natural populations of Acacia caven in Argentina
title_fullStr Landscape genetic structure of natural populations of Acacia caven in Argentina
title_full_unstemmed Landscape genetic structure of natural populations of Acacia caven in Argentina
title_sort landscape genetic structure of natural populations of acacia caven in argentina
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n4_p911_Pometti
http://hdl.handle.net/20.500.12110/paper_16142942_v8_n4_p911_Pometti
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AT vilardijuancesar landscapegeneticstructureofnaturalpopulationsofacaciacaveninargentina
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