Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size

Autores
Poggio, Lidia; González, Graciela Esther; Naranjo, Carlos Alberto
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Facultad de Ciencias Naturales y Museo
Facultad de Ciencias Agrarias y Forestales
Materia
Ciencias Naturales
Bimodal karyotype
Nuclear DNA content
Orthoselection
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82960

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network_name_str SEDICI (UNLP)
spelling Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome sizePoggio, LidiaGonzález, Graciela EstherNaranjo, Carlos AlbertoCiencias NaturalesBimodal karyotypeNuclear DNA contentOrthoselectionThis paper presents the karyotype and DNA content of 12 diploid species of <i>Hippeastrum</i> from South America. The variation in genome size is compared with the karyotype and DNA content of <i>Amaryllis belladonna</i> from South Africa. The <i>Hippeastrum</i> 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. <i>A. belladonna</i> has a larger DNA content and possesses a karyotype different from that of <i>Hippeastrum</i> spp., supporting the distinction between the two genera and upholding the name <i>Amaryllis</i> for the South African entity against <i>Hippeastrum</i> for the South American genus.Facultad de Ciencias Naturales y MuseoFacultad de Ciencias Agrarias y Forestales2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf171-178http://sedici.unlp.edu.ar/handle/10915/82960enginfo:eu-repo/semantics/altIdentifier/issn/0024-4074info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8339.2007.00645.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:41Zoai:sedici.unlp.edu.ar:10915/82960Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:42.084SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
title Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
spellingShingle Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
Poggio, Lidia
Ciencias Naturales
Bimodal karyotype
Nuclear DNA content
Orthoselection
title_short Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
title_full Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
title_fullStr Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
title_full_unstemmed Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
title_sort Chromosome studies in <i>Hippeastrum</i> (Amaryllidaceae): variation in genome size
dc.creator.none.fl_str_mv Poggio, Lidia
González, Graciela Esther
Naranjo, Carlos Alberto
author Poggio, Lidia
author_facet Poggio, Lidia
González, Graciela Esther
Naranjo, Carlos Alberto
author_role author
author2 González, Graciela Esther
Naranjo, Carlos Alberto
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Bimodal karyotype
Nuclear DNA content
Orthoselection
topic Ciencias Naturales
Bimodal karyotype
Nuclear DNA content
Orthoselection
dc.description.none.fl_txt_mv This paper presents the karyotype and DNA content of 12 diploid species of <i>Hippeastrum</i> from South America. The variation in genome size is compared with the karyotype and DNA content of <i>Amaryllis belladonna</i> from South Africa. The <i>Hippeastrum</i> 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. <i>A. belladonna</i> has a larger DNA content and possesses a karyotype different from that of <i>Hippeastrum</i> spp., supporting the distinction between the two genera and upholding the name <i>Amaryllis</i> for the South African entity against <i>Hippeastrum</i> for the South American genus.
Facultad de Ciencias Naturales y Museo
Facultad de Ciencias Agrarias y Forestales
description This paper presents the karyotype and DNA content of 12 diploid species of <i>Hippeastrum</i> from South America. The variation in genome size is compared with the karyotype and DNA content of <i>Amaryllis belladonna</i> from South Africa. The <i>Hippeastrum</i> 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. <i>A. belladonna</i> has a larger DNA content and possesses a karyotype different from that of <i>Hippeastrum</i> spp., supporting the distinction between the two genera and upholding the name <i>Amaryllis</i> for the South African entity against <i>Hippeastrum</i> for the South American genus.
publishDate 2007
dc.date.none.fl_str_mv 2007
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/82960
url http://sedici.unlp.edu.ar/handle/10915/82960
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0024-4074
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8339.2007.00645.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
171-178
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
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instname_str Universidad Nacional de La Plata
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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