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Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)

The identification of factors that structure intraspecific diversity is of particular interest for biological conservation and restoration ecology. All rangelands in Argentina are currently experiencing some form of deterioration or desertification. Acacia aroma is a multipurpose species widely dist...

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Autores principales: Pometti, Carolina, Bessega, Cecilia, Cialdella, Ana, Ewens, Mauricio, Saidman, Beatriz, Vilardi, Juan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5794153/
https://www.ncbi.nlm.nih.gov/pubmed/29389969
http://dx.doi.org/10.1371/journal.pone.0192107
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author Pometti, Carolina
Bessega, Cecilia
Cialdella, Ana
Ewens, Mauricio
Saidman, Beatriz
Vilardi, Juan
author_facet Pometti, Carolina
Bessega, Cecilia
Cialdella, Ana
Ewens, Mauricio
Saidman, Beatriz
Vilardi, Juan
author_sort Pometti, Carolina
collection PubMed
description The identification of factors that structure intraspecific diversity is of particular interest for biological conservation and restoration ecology. All rangelands in Argentina are currently experiencing some form of deterioration or desertification. Acacia aroma is a multipurpose species widely distributed throughout this country. In this study, we used the AFLP technique to study genetic diversity, population genetic structure, and fine-scale spatial genetic structure in 170 individuals belonging to 6 natural Argentinean populations. With 401 loci, the mean heterozygosity (H(E) = 0.2) and the mean percentage of polymorphic loci (PPL = 62.1%) coefficients indicated that the genetic variation is relatively high in A. aroma. The analysis with STRUCTURE showed that the number of clusters (K) was 3. With Geneland analysis, the number of clusters was K = 4, sharing the same grouping as STRUCTURE but dividing one population into two groups. When studying SGS, significant structure was detected in 3 of 6 populations. The neighbourhood size in these populations ranged from 15.2 to 64.3 individuals. The estimated gene dispersal distance depended on the effective population density and disturbance level and ranged from 45 to 864 m. The combined results suggest that a sampling strategy, which aims to maintain a considerable part of the variability contained in natural populations sampled here, would include at least 3 units defined by the clusters analyses that exhibit particular genetic properties. Moreover, the current SGS analysis suggests that within the wider management units/provinces, seed collection from A. aroma should target trees separated by a minimum distance of 50 m but preferably 150 m to reduce genetic relatedness among seeds from different trees.
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spelling pubmed-57941532018-02-16 Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae) Pometti, Carolina Bessega, Cecilia Cialdella, Ana Ewens, Mauricio Saidman, Beatriz Vilardi, Juan PLoS One Research Article The identification of factors that structure intraspecific diversity is of particular interest for biological conservation and restoration ecology. All rangelands in Argentina are currently experiencing some form of deterioration or desertification. Acacia aroma is a multipurpose species widely distributed throughout this country. In this study, we used the AFLP technique to study genetic diversity, population genetic structure, and fine-scale spatial genetic structure in 170 individuals belonging to 6 natural Argentinean populations. With 401 loci, the mean heterozygosity (H(E) = 0.2) and the mean percentage of polymorphic loci (PPL = 62.1%) coefficients indicated that the genetic variation is relatively high in A. aroma. The analysis with STRUCTURE showed that the number of clusters (K) was 3. With Geneland analysis, the number of clusters was K = 4, sharing the same grouping as STRUCTURE but dividing one population into two groups. When studying SGS, significant structure was detected in 3 of 6 populations. The neighbourhood size in these populations ranged from 15.2 to 64.3 individuals. The estimated gene dispersal distance depended on the effective population density and disturbance level and ranged from 45 to 864 m. The combined results suggest that a sampling strategy, which aims to maintain a considerable part of the variability contained in natural populations sampled here, would include at least 3 units defined by the clusters analyses that exhibit particular genetic properties. Moreover, the current SGS analysis suggests that within the wider management units/provinces, seed collection from A. aroma should target trees separated by a minimum distance of 50 m but preferably 150 m to reduce genetic relatedness among seeds from different trees. Public Library of Science 2018-02-01 /pmc/articles/PMC5794153/ /pubmed/29389969 http://dx.doi.org/10.1371/journal.pone.0192107 Text en © 2018 Pometti et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Pometti, Carolina
Bessega, Cecilia
Cialdella, Ana
Ewens, Mauricio
Saidman, Beatriz
Vilardi, Juan
Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title_full Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title_fullStr Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title_full_unstemmed Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title_short Spatial genetic structure within populations and management implications of the South American species Acacia aroma (Fabaceae)
title_sort spatial genetic structure within populations and management implications of the south american species acacia aroma (fabaceae)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5794153/
https://www.ncbi.nlm.nih.gov/pubmed/29389969
http://dx.doi.org/10.1371/journal.pone.0192107
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