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, Verónica Viviana, Comas, Cecilia Isabel, Cortés, María Cristina
Publicado:	1999
Materias:	Genetic diversity Isozymes Larrea ameghinoi Larrea nitida Taxonomic status Larrea divaricata Larrea tridentata
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v106_n3_p197_Lia 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

id	paper:paper_00166707_v106_n3_p197_Lia
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spelling	paper:paper_00166707_v106_n3_p197_Lia2023-06-08T14:38:25Z Isozyme variation in Larrea ameghinoi and Larrea nitida (Zygophyllaceae): Genetic diversity and its bearing on their relationship Lia, Verónica Viviana Comas, Cecilia Isabel Cortés, María Cristina 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. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v106_n3_p197_Lia 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, Verónica Viviana Comas, Cecilia Isabel Cortés, María Cristina 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.
author	Lia, Verónica Viviana Comas, Cecilia Isabel Cortés, María Cristina
author_facet	Lia, Verónica Viviana Comas, Cecilia Isabel Cortés, María Cristina
author_sort	Lia, Verónica Viviana
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
publishDate	1999
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v106_n3_p197_Lia http://hdl.handle.net/20.500.12110/paper_00166707_v106_n3_p197_Lia
work_keys_str_mv	AT liaveronicaviviana isozymevariationinlarreaameghinoiandlarreanitidazygophyllaceaegeneticdiversityanditsbearingontheirrelationship AT comasceciliaisabel isozymevariationinlarreaameghinoiandlarreanitidazygophyllaceaegeneticdiversityanditsbearingontheirrelationship AT cortesmariacristina isozymevariationinlarreaameghinoiandlarreanitidazygophyllaceaegeneticdiversityanditsbearingontheirrelationship
_version_	1768544023585226752

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

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