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Artículo

Karyological relationships among some South American species of Solanum (Solanaceae) based on fluorochrome banding and nuclear DNA amount

Acosta, María CristinaIcon ; Guerra, Marcelo; Moscone, Eduardo AlbertoIcon
Fecha de publicación: 05/2012
Editorial: Springer Wien
Revista: Plant Systematics And Evolution
ISSN: 0378-2697
e-ISSN: 2199-6881
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de las Plantas, Botánica

Resumen

Fluorescent chromosome banding and measurements of nuclear DNA content by image cytometry of Feulgen-stained cells were performed in one sample each of eight diploid (2n = 24) species of Solanum: S. endoadenium, S. argentinum, S. pseudocapsicum, S. atropurpureum, S. elaeagnifolium, S. sisymbriifolium, S. chenopodioides, and S. palustre. The species studied could be distinguished by heterochromatin amount, banding patterns, and genome size. They exhibited only GC-rich heterochromatin and showed a comparatively low heterochromatin amount (expressed as percentage of haplotype karyotype length), ranging from 2.10 in S. argentinum to 8.37 in S. chenopodioides.<br />Genome size displayed significant variation between species, with 1C-values ranging from 0.75 pg (735 Mbp) in S. palustre to 1.79 pg (1,754 Mbp) in S. sisymbriifolium. No significant correlation between genome size and heterochromatin amount was observed, but<br />intrachromosomal asymmetry index (A1) was negative and significantly correlated with heterochromatin amount. DNA content was positively and significantly correlated with<br />karyotype length. DNA C-value distribution in the genus as well as karyotype affinities and relationships between species are discussed in relation to different infrageneric classifications of Solanum.
Palabras clave: Dna C-Values , Fluorochrome Banding , Genome Size Variation , Heterochromatin Differentiation , Karyosystematics , Solanum
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/12491
URL: http://link.springer.com/article/10.1007%2Fs00606-012-0657-x
DOI: http://dx.doi.org/10.1007/s00606-012-0657-x
Colecciones
Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Acosta, María Cristina; Guerra, Marcelo; Moscone, Eduardo Alberto; Karyological relationships among some South American species of Solanum (Solanaceae) based on fluorochrome banding and nuclear DNA amount; Springer Wien; Plant Systematics And Evolution; 298; 8; 5-2012; 1547-1556
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