Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae)
Acacia caven (Mol.) Mol. is native to South America. The species is a leguminous, woody small tree that is considered to have certain potential as a managed silvopastoral crop. Six varieties have been described for the species based on both morphological traits and molecular markers. Little informat...
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paper:paper_03782697_v292_n1-2_p25_Pometti2023-06-08T15:39:33Z Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) Pometti, Carolina Luciana Vilardi, Juan Cesar Saidman, Beatriz Ofelia Acacia caven Genetic structure Mating system parameters Outcrosser Acacia Acacia caven Fabaceae Mimosoideae Acacia caven (Mol.) Mol. is native to South America. The species is a leguminous, woody small tree that is considered to have certain potential as a managed silvopastoral crop. Six varieties have been described for the species based on both morphological traits and molecular markers. Little information is available on its mating system. The main objectives of this work were to test the hypothesis that A. caven is an outcrosser and to estimate parameters of its mating system and population structure on the basis of isozyme markers. In the four populations studied, a high homozygote excess was found in the progeny population but not in the mother plant genotypes. The estimate for the multi-locus outcrossing rate (tm) was high (≥0. 957) in all populations, indicating that Acacia caven is a predominantly outcrosser species. The results of genetic structure analysis within each population indicated that differences in allelic frequencies among families in all of the populations studied are highly significant. The difference in F estimates between progeny and mother plants suggests some selection favouring heterozygotes between the seedling and adult stages. Therefore, a strategy for ex situ conservation might emphasise sampling more populations with a relative large number of trees per site. © 2010 Springer-Verlag. Fil:Pometti, C.L. 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03782697_v292_n1-2_p25_Pometti http://hdl.handle.net/20.500.12110/paper_03782697_v292_n1-2_p25_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 Genetic structure Mating system parameters Outcrosser Acacia Acacia caven Fabaceae Mimosoideae |
spellingShingle |
Acacia caven Genetic structure Mating system parameters Outcrosser Acacia Acacia caven Fabaceae Mimosoideae Pometti, Carolina Luciana Vilardi, Juan Cesar Saidman, Beatriz Ofelia Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
topic_facet |
Acacia caven Genetic structure Mating system parameters Outcrosser Acacia Acacia caven Fabaceae Mimosoideae |
description |
Acacia caven (Mol.) Mol. is native to South America. The species is a leguminous, woody small tree that is considered to have certain potential as a managed silvopastoral crop. Six varieties have been described for the species based on both morphological traits and molecular markers. Little information is available on its mating system. The main objectives of this work were to test the hypothesis that A. caven is an outcrosser and to estimate parameters of its mating system and population structure on the basis of isozyme markers. In the four populations studied, a high homozygote excess was found in the progeny population but not in the mother plant genotypes. The estimate for the multi-locus outcrossing rate (tm) was high (≥0. 957) in all populations, indicating that Acacia caven is a predominantly outcrosser species. The results of genetic structure analysis within each population indicated that differences in allelic frequencies among families in all of the populations studied are highly significant. The difference in F estimates between progeny and mother plants suggests some selection favouring heterozygotes between the seedling and adult stages. Therefore, a strategy for ex situ conservation might emphasise sampling more populations with a relative large number of trees per site. © 2010 Springer-Verlag. |
author |
Pometti, Carolina Luciana Vilardi, Juan Cesar Saidman, Beatriz Ofelia |
author_facet |
Pometti, Carolina Luciana Vilardi, Juan Cesar Saidman, Beatriz Ofelia |
author_sort |
Pometti, Carolina Luciana |
title |
Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
title_short |
Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
title_full |
Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
title_fullStr |
Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
title_full_unstemmed |
Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) |
title_sort |
mating system parameters and genetic structure in argentinean populations of acacia caven (leguminosae, mimosoideae) |
publishDate |
2011 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03782697_v292_n1-2_p25_Pometti http://hdl.handle.net/20.500.12110/paper_03782697_v292_n1-2_p25_Pometti |
work_keys_str_mv |
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_version_ |
1768543850483154944 |