Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size

This paper presents the karyotype and DNA content of 12 diploid species of Hippeastrum from South America. The variation in genome size is compared with the karyotype and DNA content of Amaryllis belladonna from South Africa. The Hippeastrum species present a uniform and bimodal basic karyotype form...

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Detalles Bibliográficos
Autores principales:	Poggio, Lidia, González, Graciela Esther, Naranjo, Carlos Alberto
Publicado:	2007
Materias:	Bimodal karyotype Nuclear DNA content Orthoselection angiosperm chromosome DNA genome karyotype Amaryllidaceae Amaryllis (angiosperm) Amaryllis belladonna Atropa belladonna Hippeastrum
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00244074_v155_n2_p171_Poggio http://hdl.handle.net/20.500.12110/paper_00244074_v155_n2_p171_Poggio
Aporte de:	Aportado por : Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires .

id	paper:paper_00244074_v155_n2_p171_Poggio
record_format	dspace
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Bimodal karyotype Nuclear DNA content Orthoselection angiosperm chromosome DNA genome karyotype Amaryllidaceae Amaryllis (angiosperm) Amaryllis belladonna Atropa belladonna Hippeastrum
spellingShingle	Bimodal karyotype Nuclear DNA content Orthoselection angiosperm chromosome DNA genome karyotype Amaryllidaceae Amaryllis (angiosperm) Amaryllis belladonna Atropa belladonna Hippeastrum Poggio, Lidia González, Graciela Esther Naranjo, Carlos Alberto Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
topic_facet	Bimodal karyotype Nuclear DNA content Orthoselection angiosperm chromosome DNA genome karyotype Amaryllidaceae Amaryllis (angiosperm) Amaryllis belladonna Atropa belladonna Hippeastrum
description	This paper presents the karyotype and DNA content of 12 diploid species of Hippeastrum from South America. The variation in genome size is compared with the karyotype and DNA content of Amaryllis belladonna from South Africa. The Hippeastrum species present a uniform and bimodal basic karyotype formula, but significant differences are found in the total chromosome volume (TCV) and nuclear DNA content. A positive correlation between the DNA content and TCV is also observed. The karyotype's constancy is a product of changes in DNA content occurring in the whole chromosome complement. The DNA addition to the long and short sets of chromosomes varies independently. In species with higher DNA contents, the short chromosomes add equal DNA amounts to both arms, maintaining their metacentric morphology, whereas the long chromosomes add DNA only to the short arm, increasing the chromosome symmetry. These data show that the evolutionary changes in DNA amount are proportional to chromosome length, maintaining the karyotypic uniformity. A. belladonna has a larger DNA content and possesses a karyotype different from that of Hippeastrum spp., supporting the distinction between the two genera and upholding the name Amaryllis for the South African entity against Hippeastrum for the South American genus. © 2007 The Linnean Society of London.
author	Poggio, Lidia González, Graciela Esther Naranjo, Carlos Alberto
author_facet	Poggio, Lidia González, Graciela Esther Naranjo, Carlos Alberto
author_sort	Poggio, Lidia
title	Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
title_short	Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
title_full	Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
title_fullStr	Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
title_full_unstemmed	Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size
title_sort	chromosome studies in hippeastrum (amaryllidaceae): variation in genome size
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00244074_v155_n2_p171_Poggio http://hdl.handle.net/20.500.12110/paper_00244074_v155_n2_p171_Poggio
work_keys_str_mv	AT poggiolidia chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize AT gonzalezgracielaesther chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize AT naranjocarlosalberto chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize
bdutipo_str	Repositorios
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Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size

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