Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship

Electrophoretic variants for 11 isozyme systems were examined by horizontal polyacrilamide gel electrophoresis in natural populations of Larrea ameghinoi and L. nitida (section Larrea). The two taxa presented fixed alternative allelic variants at loci Adh-1, Gdh-1 and Mdh-1. Genetic variability esti...

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Autores principales: Lia, V., Comas, C.I., Cortés, M.C., Hunziker, J.H.
Formato: JOUR
Materias:
Genetic diversity
Isozymes
Larrea ameghinoi
Larrea nitida
Taxonomic status
Larrea divaricata
Larrea tridentata
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00166707_v106_n3_p197_Lia
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00166707_v106_n3_p197_Lia2023-10-03T14:14:11Z Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship Lia, V. Comas, C.I. Cortés, M.C. Hunziker, J.H. Genetic diversity Isozymes Larrea ameghinoi Larrea nitida Taxonomic status Larrea ameghinoi Larrea divaricata Larrea nitida Larrea tridentata Electrophoretic variants for 11 isozyme systems were examined by horizontal polyacrilamide gel electrophoresis in natural populations of Larrea ameghinoi and L. nitida (section Larrea). The two taxa presented fixed alternative allelic variants at loci Adh-1, Gdh-1 and Mdh-1. Genetic variability estimates showed no statistically significant differences among populations of section Larrea (H(e): 0.097-0.167). However, these values were significantly lower than those reported for species of section Bifolium (L. divaricata, diploid L. tridentata) in a previous contribution (H(e): 0.17-0.29). Positive and highly significant Wright's fixation indices are in agreement with higher amounts of inbreeding for L. nitida and L. ameghinoi, as suggested on the basis of floral morphology by previous authors. Moreover, the higher levels of genetic differentiation obtained for conspecific populations of section Larrea as compared to those of section Bifolium are also consistent with these observations. Nei's genetic identity values obtained for sympatric (I = 0.80) and allopatric (I = 0.63-0.73) L. ameghinoi - L. nitida population pairs are concordant with those expected for different, but closely related congeneric species. Fil:Lia, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Comas, C.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cortés, M.C. 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_00166707_v106_n3_p197_Lia
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Genetic diversity
Isozymes
Larrea ameghinoi
Larrea nitida
Taxonomic status
Larrea ameghinoi
Larrea divaricata
Larrea nitida
Larrea tridentata
spellingShingle Genetic diversity
Isozymes
Larrea ameghinoi
Larrea nitida
Taxonomic status
Larrea ameghinoi
Larrea divaricata
Larrea nitida
Larrea tridentata
Lia, V.
Comas, C.I.
Cortés, M.C.
Hunziker, J.H.
Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
topic_facet Genetic diversity
Isozymes
Larrea ameghinoi
Larrea nitida
Taxonomic status
Larrea ameghinoi
Larrea divaricata
Larrea nitida
Larrea tridentata
description Electrophoretic variants for 11 isozyme systems were examined by horizontal polyacrilamide gel electrophoresis in natural populations of Larrea ameghinoi and L. nitida (section Larrea). The two taxa presented fixed alternative allelic variants at loci Adh-1, Gdh-1 and Mdh-1. Genetic variability estimates showed no statistically significant differences among populations of section Larrea (H(e): 0.097-0.167). However, these values were significantly lower than those reported for species of section Bifolium (L. divaricata, diploid L. tridentata) in a previous contribution (H(e): 0.17-0.29). Positive and highly significant Wright's fixation indices are in agreement with higher amounts of inbreeding for L. nitida and L. ameghinoi, as suggested on the basis of floral morphology by previous authors. Moreover, the higher levels of genetic differentiation obtained for conspecific populations of section Larrea as compared to those of section Bifolium are also consistent with these observations. Nei's genetic identity values obtained for sympatric (I = 0.80) and allopatric (I = 0.63-0.73) L. ameghinoi - L. nitida population pairs are concordant with those expected for different, but closely related congeneric species.
format JOUR
author Lia, V.
Comas, C.I.
Cortés, M.C.
Hunziker, J.H.
author_facet Lia, V.
Comas, C.I.
Cortés, M.C.
Hunziker, J.H.
author_sort Lia, V.
title Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
title_short Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
title_full Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
title_fullStr Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
title_full_unstemmed Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship
title_sort isozyme variation in larrea ameghinoi and larrea nitida (zygophyllaceae): genetic diversity and its bearing on their relationship
url http://hdl.handle.net/20.500.12110/paper_00166707_v106_n3_p197_Lia
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AT cortesmc isozymevariationinlarreaameghinoiandlarreanitidazygophyllaceaegeneticdiversityanditsbearingontheirrelationship
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