Artículo
Karyotypic studies in Lycium section Mesocope (Solanaceae) from South America
Fecha de publicación:
01/2002
Editorial:
Univ Florence Botany Inst
Revista:
Caryologia
ISSN:
0008-7114
e-ISSN:
2165-5391
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Mitotic chromosome numbers and karyotypes were determined for South American species of Lycium L. section Mesocope Miers (Tribe Lycieae). Twenty populations from nine species were examined. All of them have 2n = 2x = 24, a fact that confirms the basic number x = 12 suggested for the tribe and the subfamily Solanoideae. The chromosome numbers of L. chanar, L. minutifolium, L. stenophyllum, and L. vimineum are reported for the first time and data on karyotype composition are all new. Chromosome measurements were statistically compared and a phenogram was obtained with those data. Results suggest that although these species are morphologically different, their differentiation was not followed by variations in chromosome number or structure. The karyotype of all the studied taxa is composed of 11 m pairs + 1 sm pair (pair #1 bears a microsatellite on the short arm) showing slight differences in size among the species. Thus, during the diversification within the section, no major visible chromosomal rearrangements have occurred, although cryptic structural changes, as paracentric inversions or reciprocal translocations of segments of similar length may have taken place. © 2002 Taylor & Francis Group, LLC.
Palabras clave:
Chromosome Number
,
Karyotype
,
Lycium Sect. Mesocope
,
Phenetics
,
South America
Archivos asociados
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Identificadores
Colecciones
Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Stiefkens, Laura Beatriz; Bernardello, Gabriel Luis Mario; Karyotypic studies in Lycium section Mesocope (Solanaceae) from South America; Univ Florence Botany Inst; Caryologia; 55; 3; 1-2002; 199-206
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