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

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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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Autores principales: Poggio, L., González, G., Naranjo, C.A.
Formato: Artículo publishedVersion
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:http://hdl.handle.net/20.500.12110/paper_00244074_v155_n2_p171_Poggio
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00244074_v155_n2_p171_Poggio_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00244074_v155_n2_p171_Poggio_oai
record_format dspace
spelling I28-R145-paper_00244074_v155_n2_p171_Poggio_oai2024-08-16 Poggio, L. González, G. Naranjo, C.A. 2007 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. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:González, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Naranjo, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00244074_v155_n2_p171_Poggio info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Bot. J. Linn. Soc. 2007;155(2):171-178 Bimodal karyotype Nuclear DNA content Orthoselection angiosperm chromosome DNA genome karyotype Amaryllidaceae Amaryllis (angiosperm) Amaryllis belladonna Atropa belladonna Hippeastrum Chromosome studies in Hippeastrum (Amaryllidaceae): Variation in genome size info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00244074_v155_n2_p171_Poggio_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (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, L.
González, G.
Naranjo, C.A.
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.
format Artículo
Artículo
publishedVersion
author Poggio, L.
González, G.
Naranjo, C.A.
author_facet Poggio, L.
González, G.
Naranjo, C.A.
author_sort Poggio, L.
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 http://hdl.handle.net/20.500.12110/paper_00244074_v155_n2_p171_Poggio
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00244074_v155_n2_p171_Poggio_oai
work_keys_str_mv AT poggiol chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize
AT gonzalezg chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize
AT naranjoca chromosomestudiesinhippeastrumamaryllidaceaevariationingenomesize
_version_ 1809356795914747904

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