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Abstract:

Cytogenetic studies of the family Lycosidae (Arachnida: Araneae) are scarce. Less than 4% of the described species have been analyzed and the male haploid chromosome numbers ranged from 8+X1X2 to 13+X1X2. Species formerly classified as Lycosa were the most studied ones. Our aim in this work was to perform a comparative analysis of the meiosis in "Lycosa" erythrognatha Lucas, "Lycosa" pampeana Holmberg and Schizocosa malitiosa (Tullgren). We also compared male and female karyotypes and characterized the heterochromatin of "L." erythrognatha. The males of the three species had 2n = 22, n = 10+X1X2, all the chromosomes were telocentric and there was generally a single chiasma per bivalent. In "Lycosa" pampeana, which is described cytogenetically for the first time herein, the bivalents and sex chromosomes showed a clustered arrangement at prometaphase I. The comparison of the male/female karyotypes (2n = 22/ 24) of "Lycosa" erythrognatha revealed that the sex chromosomes were the largest of the complement and that the autosomes decreased gradually in size. The analysis of the amount, composition and distribution of heterochromatin with C-banding and staining with DAPI- and CMA3- showed that "Lycosa" erythrognatha had little GC-rich heterochromatin in the pericentromeric region of all chromosomes. In addition, the actual occurrence of the genus Lycosa in the Southern Hemisphere is discussed. Copyright © 2008, Sociedade Brasileira de Genética.

Registro:

Documento: Artículo
Título:Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae)
Autor:Chemisquy, M.A.; Rodríguez Gil, S.G.; Scioscia, C.L.; Mola, L.M.
Filiación:Instituto de Botánica Darwinion, San Isidro, Buenos Aires, Argentina
Laboratorio de Citogenética y Evolución, Departamento de Ecología Genética y Evolución, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
División Aracnología, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Ciudad Autónoma de Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:"Lycosa" and Schizocosa; C-banding; Fluorochrome staining; Karyotype; Meiosis; Spiders; 4',6 diamidino 2 phenylindole; animal genetics; arachnid; Argentina; article; autosome; centromere; chromosome analysis; chromosome bivalent; chromosome C band; chromosome chiasm; chromosome size; controlled study; female; GC rich sequence; heterochromatin; karyotyping; Lycosa erythrognatha; Lycosa pampeana; male; meiosis; nonhuman; prometaphase; Schizocosa malitiosa; sex chromosome; species comparison; spider; Arachnida; Araneae; Lycosa; Lycosa erythrognatha; Lycosidae; Schizocosa
Año:2008
Volumen:31
Número:4
Página de inicio:857
Página de fin:867
DOI: http://dx.doi.org/10.1590/S1415-47572008005000022
Título revista:Genetics and Molecular Biology
Título revista abreviado:Genet. Mol. Biol.
ISSN:14154757
CODEN:GMBIF
CAS:4',6 diamidino 2 phenylindole, 47165-04-8
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14154757_v31_n4_p857_Chemisquy

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Citas:

---------- APA ----------
Chemisquy, M.A., Rodríguez Gil, S.G., Scioscia, C.L. & Mola, L.M. (2008) . Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae). Genetics and Molecular Biology, 31(4), 857-867.
http://dx.doi.org/10.1590/S1415-47572008005000022
---------- CHICAGO ----------
Chemisquy, M.A., Rodríguez Gil, S.G., Scioscia, C.L., Mola, L.M. "Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae)" . Genetics and Molecular Biology 31, no. 4 (2008) : 857-867.
http://dx.doi.org/10.1590/S1415-47572008005000022
---------- MLA ----------
Chemisquy, M.A., Rodríguez Gil, S.G., Scioscia, C.L., Mola, L.M. "Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae)" . Genetics and Molecular Biology, vol. 31, no. 4, 2008, pp. 857-867.
http://dx.doi.org/10.1590/S1415-47572008005000022
---------- VANCOUVER ----------
Chemisquy, M.A., Rodríguez Gil, S.G., Scioscia, C.L., Mola, L.M. Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae). Genet. Mol. Biol. 2008;31(4):857-867.
http://dx.doi.org/10.1590/S1415-47572008005000022