Cytogenetic studies of Southern South-American Ilex

The dioecious genus Ilex (Aquifoliaceae) has been poorly studied from a cytogenetic point of view. Chromosome numbers of only ca. 5% of the species have been reported. In the present work the chromosome number of eight taxa from Argentina and Brazil are presented: Ilex taubertiana Loes., I. integerr...

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Autores principales:	Greizerstein, E.J., Poggio, L., Giberti, G.C.
Formato:	JOUR
Materias:	Aquifoliaceae Chromosome number Ilex Polyploidy Ilex argentina Ilex brevicuspis Ilex dumosa Ilex integerrima Ilex paraguariensis Ilex pseudobuxus Ilex taubertiana Ilex theezans
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00087114_v57_n1_p19_Greizerstein
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00087114_v57_n1_p19_Greizerstein
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spelling	todo:paper_00087114_v57_n1_p19_Greizerstein2023-10-03T14:07:50Z Cytogenetic studies of Southern South-American Ilex Greizerstein, E.J. Poggio, L. Greizerstein, E.J. Poggio, L. Giberti, G.C. Aquifoliaceae Chromosome number Ilex Polyploidy Aquifoliaceae Ilex Ilex argentina Ilex brevicuspis Ilex dumosa Ilex integerrima Ilex paraguariensis Ilex pseudobuxus Ilex taubertiana Ilex theezans The dioecious genus Ilex (Aquifoliaceae) has been poorly studied from a cytogenetic point of view. Chromosome numbers of only ca. 5% of the species have been reported. In the present work the chromosome number of eight taxa from Argentina and Brazil are presented: Ilex taubertiana Loes., I. integerrima (Vell.) Reissek and I. pseudobuxus Reissek present 2n = 40, being this the first report for these species. A diploid number of 40 is also confirmed for I. paraguariensis A. St. - Hil, I. brevicuspis Reissek, I. dumosa Reissek and I. theezans Reissek, and 2n = 80 for I. argentina Lillo. Species with 2n = 40 (n = 20) show a regular meiotic behaviour with 20 bivalents, while I. argentina also shows a regular meiosis with 40 bivalents. Those individuals of I. paraguariensis analyzed in the present paper do not show a heteromorphic bivalent as previously reported and ascribed to sex chromosomes. © 2004 Taylor & Francis Group, LLC. Fil:Greizerstein, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. 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_00087114_v57_n1_p19_Greizerstein
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Aquifoliaceae Chromosome number Ilex Polyploidy Aquifoliaceae Ilex Ilex argentina Ilex brevicuspis Ilex dumosa Ilex integerrima Ilex paraguariensis Ilex pseudobuxus Ilex taubertiana Ilex theezans
spellingShingle	Aquifoliaceae Chromosome number Ilex Polyploidy Aquifoliaceae Ilex Ilex argentina Ilex brevicuspis Ilex dumosa Ilex integerrima Ilex paraguariensis Ilex pseudobuxus Ilex taubertiana Ilex theezans Greizerstein, E.J. Poggio, L. Greizerstein, E.J. Poggio, L. Giberti, G.C. Cytogenetic studies of Southern South-American Ilex
topic_facet	Aquifoliaceae Chromosome number Ilex Polyploidy Aquifoliaceae Ilex Ilex argentina Ilex brevicuspis Ilex dumosa Ilex integerrima Ilex paraguariensis Ilex pseudobuxus Ilex taubertiana Ilex theezans
description	The dioecious genus Ilex (Aquifoliaceae) has been poorly studied from a cytogenetic point of view. Chromosome numbers of only ca. 5% of the species have been reported. In the present work the chromosome number of eight taxa from Argentina and Brazil are presented: Ilex taubertiana Loes., I. integerrima (Vell.) Reissek and I. pseudobuxus Reissek present 2n = 40, being this the first report for these species. A diploid number of 40 is also confirmed for I. paraguariensis A. St. - Hil, I. brevicuspis Reissek, I. dumosa Reissek and I. theezans Reissek, and 2n = 80 for I. argentina Lillo. Species with 2n = 40 (n = 20) show a regular meiotic behaviour with 20 bivalents, while I. argentina also shows a regular meiosis with 40 bivalents. Those individuals of I. paraguariensis analyzed in the present paper do not show a heteromorphic bivalent as previously reported and ascribed to sex chromosomes. © 2004 Taylor & Francis Group, LLC.
format	JOUR
author	Greizerstein, E.J. Poggio, L. Greizerstein, E.J. Poggio, L. Giberti, G.C.
author_facet	Greizerstein, E.J. Poggio, L. Greizerstein, E.J. Poggio, L. Giberti, G.C.
author_sort	Greizerstein, E.J.
title	Cytogenetic studies of Southern South-American Ilex
title_short	Cytogenetic studies of Southern South-American Ilex
title_full	Cytogenetic studies of Southern South-American Ilex
title_fullStr	Cytogenetic studies of Southern South-American Ilex
title_full_unstemmed	Cytogenetic studies of Southern South-American Ilex
title_sort	cytogenetic studies of southern south-american ilex
url	http://hdl.handle.net/20.500.12110/paper_00087114_v57_n1_p19_Greizerstein
work_keys_str_mv	AT greizersteinej cytogeneticstudiesofsouthernsouthamericanilex AT poggiol cytogeneticstudiesofsouthernsouthamericanilex AT greizersteinej cytogeneticstudiesofsouthernsouthamericanilex AT poggiol cytogeneticstudiesofsouthernsouthamericanilex AT gibertigc cytogeneticstudiesofsouthernsouthamericanilex
_version_	1807318376336326656

Cytogenetic studies of Southern South-American Ilex

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