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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Autores principales: Pometti, C.L., Vilardi, J.C., Saidman, B.O.
Formato: JOUR
Materias:
Acacia caven
Genetic structure
Mating system parameters
Outcrosser
Acacia
Fabaceae
Mimosoideae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03782697_v292_n1-2_p25_Pometti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03782697_v292_n1-2_p25_Pometti
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spelling todo:paper_03782697_v292_n1-2_p25_Pometti2023-10-03T15:32:09Z Mating system parameters and genetic structure in Argentinean populations of Acacia caven (Leguminosae, Mimosoideae) Pometti, C.L. Vilardi, J.C. Saidman, B.O. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, C.L.
Vilardi, J.C.
Saidman, B.O.
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.
format JOUR
author Pometti, C.L.
Vilardi, J.C.
Saidman, B.O.
author_facet Pometti, C.L.
Vilardi, J.C.
Saidman, B.O.
author_sort Pometti, C.L.
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)
url http://hdl.handle.net/20.500.12110/paper_03782697_v292_n1-2_p25_Pometti
work_keys_str_mv AT pometticl matingsystemparametersandgeneticstructureinargentineanpopulationsofacaciacavenleguminosaemimosoideae
AT vilardijc matingsystemparametersandgeneticstructureinargentineanpopulationsofacaciacavenleguminosaemimosoideae
AT saidmanbo matingsystemparametersandgeneticstructureinargentineanpopulationsofacaciacavenleguminosaemimosoideae
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