Allozyme genetic distances and evolutionary relationships in marsupials of North and South America

Allozyme genetic distances and variability were studied by horizontal starch gel electrophoresis in 6 species of marsupials from North and South America representing 4 different genera. Twenty-one presumptive loci were assessed in a total of 151 specimens. Only 1 of 21 loci was found to be monomorph...

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Autores principales:	Barrantes, G.E., Daleffe, L.
Formato:	JOUR
Materias:	Allozymes Marsupials Systematic relationships allozyme evolutionary biology genetic variation marsupial North America South America Didelphis albiventris Didelphis marsupialis Didelphis virginiana Lestodelphys halli Lutreolina crassicaudata Metatheria Monodelphis dimidiata
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00017051_v44_n3_p233_Barrantes
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00017051_v44_n3_p233_Barrantes
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spelling	todo:paper_00017051_v44_n3_p233_Barrantes2023-10-03T13:51:33Z Allozyme genetic distances and evolutionary relationships in marsupials of North and South America Barrantes, G.E. Daleffe, L. Allozymes Marsupials Systematic relationships allozyme evolutionary biology genetic variation marsupial North America South America Didelphis albiventris Didelphis albiventris Didelphis marsupialis Didelphis marsupialis Didelphis virginiana Didelphis virginiana Lestodelphys halli Lestodelphys halli Lutreolina crassicaudata Lutreolina crassicaudata Metatheria Monodelphis dimidiata Monodelphis dimidiata Allozyme genetic distances and variability were studied by horizontal starch gel electrophoresis in 6 species of marsupials from North and South America representing 4 different genera. Twenty-one presumptive loci were assessed in a total of 151 specimens. Only 1 of 21 loci was found to be monomorphic in the whole sample. Phenetic and cladistic interspecific analysis coincided in rendering two sharply differentiated subgroups: one comprising species of the genus Didelphis Linnaeus, 1758 (D. marsupialis Linnaeus, 1758, D. virginiana Kerr, 1792 and D. albiventris Lund, 1840), and the other comprising Monodelphis dimidiata (Wagner, 1847), Lestodelphys halli (Thomas, 1921) and Lutreolina crassicaudata (Desmarest, 1804). No relationships between the bradytelic condition, the karyotype stability of this group, and genetic variability were found. On the other hand, the existence of species with brief life span such as Lestodelphys halli and Monodelphis dimidiata (Marmosini tribe) and species with long life span (Didelphini tribe) allowed us to test the hypothesis which correlates generation-time with genetic variability. We conclude that a general explanation for genetic variability must involve more than just generation-time. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00017051_v44_n3_p233_Barrantes
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Allozymes Marsupials Systematic relationships allozyme evolutionary biology genetic variation marsupial North America South America Didelphis albiventris Didelphis albiventris Didelphis marsupialis Didelphis marsupialis Didelphis virginiana Didelphis virginiana Lestodelphys halli Lestodelphys halli Lutreolina crassicaudata Lutreolina crassicaudata Metatheria Monodelphis dimidiata Monodelphis dimidiata
spellingShingle	Allozymes Marsupials Systematic relationships allozyme evolutionary biology genetic variation marsupial North America South America Didelphis albiventris Didelphis albiventris Didelphis marsupialis Didelphis marsupialis Didelphis virginiana Didelphis virginiana Lestodelphys halli Lestodelphys halli Lutreolina crassicaudata Lutreolina crassicaudata Metatheria Monodelphis dimidiata Monodelphis dimidiata Barrantes, G.E. Daleffe, L. Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
topic_facet	Allozymes Marsupials Systematic relationships allozyme evolutionary biology genetic variation marsupial North America South America Didelphis albiventris Didelphis albiventris Didelphis marsupialis Didelphis marsupialis Didelphis virginiana Didelphis virginiana Lestodelphys halli Lestodelphys halli Lutreolina crassicaudata Lutreolina crassicaudata Metatheria Monodelphis dimidiata Monodelphis dimidiata
description	Allozyme genetic distances and variability were studied by horizontal starch gel electrophoresis in 6 species of marsupials from North and South America representing 4 different genera. Twenty-one presumptive loci were assessed in a total of 151 specimens. Only 1 of 21 loci was found to be monomorphic in the whole sample. Phenetic and cladistic interspecific analysis coincided in rendering two sharply differentiated subgroups: one comprising species of the genus Didelphis Linnaeus, 1758 (D. marsupialis Linnaeus, 1758, D. virginiana Kerr, 1792 and D. albiventris Lund, 1840), and the other comprising Monodelphis dimidiata (Wagner, 1847), Lestodelphys halli (Thomas, 1921) and Lutreolina crassicaudata (Desmarest, 1804). No relationships between the bradytelic condition, the karyotype stability of this group, and genetic variability were found. On the other hand, the existence of species with brief life span such as Lestodelphys halli and Monodelphis dimidiata (Marmosini tribe) and species with long life span (Didelphini tribe) allowed us to test the hypothesis which correlates generation-time with genetic variability. We conclude that a general explanation for genetic variability must involve more than just generation-time.
format	JOUR
author	Barrantes, G.E. Daleffe, L.
author_facet	Barrantes, G.E. Daleffe, L.
author_sort	Barrantes, G.E.
title	Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
title_short	Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
title_full	Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
title_fullStr	Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
title_full_unstemmed	Allozyme genetic distances and evolutionary relationships in marsupials of North and South America
title_sort	allozyme genetic distances and evolutionary relationships in marsupials of north and south america
url	http://hdl.handle.net/20.500.12110/paper_00017051_v44_n3_p233_Barrantes
work_keys_str_mv	AT barrantesge allozymegeneticdistancesandevolutionaryrelationshipsinmarsupialsofnorthandsouthamerica AT daleffel allozymegeneticdistancesandevolutionaryrelationshipsinmarsupialsofnorthandsouthamerica
_version_	1782027557857656832

Allozyme genetic distances and evolutionary relationships in marsupials of North and South America

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