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Artículo

Cytogenetic analysis on geographically distant parthenogenetic populations of Tityus trivittatus Kraepelin, 1898 (Scorpiones, Buthidae): karyotype, constitutive heterochromatin and rDNA localization

Adilardi, Renzo SebastiánIcon ; Ojanguren Affilastro, Andres AlejandroIcon ; Marti, Dardo AndreaIcon ; Mola, Liliana MariaIcon
Fecha de publicación: 03/2014
Editorial: Zoological Inst
Revista: Comparative Cytogenetics
ISSN: 1993-0771
e-ISSN: 1993-078X
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Genética y Herencia; Zoología, Ornitología, Entomología, Etología

Resumen

Tityus trivittatus Kraepelin, 1898 is the most medically important scorpion species of Argentina, and parthenogenetic populations are present in the major cities of this country. We performed a detailed cytogenetic analysis of specimens of three synanthropic parthenogenetic populations, all distant about 900 km from each other, using Ag-NOR, C-banding, DAPI/CMA3 staining and FISH with autologous 28S rDNA probes. The karyotype of females and embryos from the three populations showed 2n=6, with two large and four middle-sized holokinetic chromosomes. Constitutive heterochromatin was found in terminal and interstitial location and its pattern allowed the identification of three chromosome pairs. NORs were found on the terminal heterochromatic region of one pair of middle-sized chromosomes. The use of fluorochromes to characterize heterochromatin showed the absence of GC-rich heterochromatin and a low and variable number of AT-rich heterochromatic regions. We propose that a possible explanation for the lack of karyotypic variation between these geographically distant populations could be a recent colonization of urban areas by human means of synanthropic specimens from a single lineage of northeastern Argentina.
Palabras clave: Scorpions , Holokinetic Chromosomes , Parthenogenesis , Karyotype , Fish , Nor
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/18057
URL: https://compcytogen.pensoft.net/articles.php?id=1814
DOI: http://dx.doi.org/10.3897/CompCytogen.v8i2.6461
Colecciones
Articulos(IBS)
Articulos de INSTITUTO DE BIOLOGIA SUBTROPICAL
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Adilardi, Renzo Sebastián; Ojanguren Affilastro, Andres Alejandro; Marti, Dardo Andrea; Mola, Liliana Maria; Cytogenetic analysis on geographically distant parthenogenetic populations of Tityus trivittatus Kraepelin, 1898 (Scorpiones, Buthidae): karyotype, constitutive heterochromatin and rDNA localization; Zoological Inst; Comparative Cytogenetics; 8; 2; 3-2014; 81-92
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