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dc.contributor.author
Acosta, María Cristina
dc.contributor.author
Moscone, Eduardo Alberto
dc.date.available
2017-02-21T16:11:09Z
dc.date.issued
2011-01
dc.identifier.citation
Acosta, María Cristina; Moscone, Eduardo Alberto; B Chromosomes in Nierembergia aristata (Solanaceae): Nucleolar Activity and Competition with the A Chromosomes; Karger; Cytogenetic And Genome Research; 132; 1-2; 1-2011; 105-112
dc.identifier.issn
1424-8581
dc.identifier.uri
http://hdl.handle.net/11336/13250
dc.description.abstract
B chromosomes are additional dispensable chromosomes that may be present in some individuals, populations, or species, which have probably arisen from the A chromosomes but follow their own evolutionary pathway. Supposedly, B chromosomes do not contain major genes except for ribosomal DNA (rDNA) sequences that have been mapped on the supernumerary chromosomes of many plants and animals. This paper is a new report of B chromosome occurrence in plants. B chromosomes with nucleolar organizing regions (NORs) were found in a diploid sample of Nierembergiaaristata D. Don (sub nom. N. stricta Miers) (2n = 2x = 16). This is an extreme case in which B chromosomes possess not only strong nucleolar activity, as revealed by conventional staining methods, AgNOR and fluorescence banding, and fluorescent in situ hybridization (FISH), but also show nucleolar competition with the A chromosomes. The observed phenomenon could be analogous to the nucleolar dominance or ‘differential amphiplasty’ phenomenon that occurs in interspecific hybrids.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Karger
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
B Chromosomes
dc.subject
Nierembregia
dc.subject
Nucleolar Activity
dc.subject
Nucleolar Dominance
dc.subject
Solanaceae
dc.subject.classification
Genética y Herencia
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
B Chromosomes in Nierembergia aristata (Solanaceae): Nucleolar Activity and Competition with the A Chromosomes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-02-14T14:34:31Z
dc.identifier.eissn
1424-859X
dc.journal.volume
132
dc.journal.number
1-2
dc.journal.pagination
105-112
dc.journal.pais
Suiza
dc.journal.ciudad
Basel
dc.description.fil
Fil: Acosta, María Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina
dc.description.fil
Fil: Moscone, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina
dc.journal.title
Cytogenetic And Genome Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.karger.com/Article/Abstract/320705
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1159/000320705


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