Please use this identifier to cite or link to this item:
https://repositorio.inpa.gov.br/handle/1/36658| Title: | Cytogenetic analysis of three ctenidae species (Araneae) from the Amazon |
| Authors: | Pinto Neto, José Paulo da Costa Goll, Leonardo Gusso Gross, Maria Claudia Feldsberg, Eliana Schneider, Carlos Henrique |
| Keywords: | Centromere Chromosome Analysis clinical article Constitutive Heterochromatin Meiosis Nonhuman Sex Chromosome Spider |
| Issue Date: | 2020 |
| metadata.dc.publisher.journal: | Genetics and Molecular Biology |
| metadata.dc.relation.ispartof: | Volume 43, Número 4 |
| Abstract: | Cytogenetic characterization was performed on three wandering spiders: Ctenus amphora Mello-Leitão, 1930, C. crulsi Mello-Leitão, 1930 and C. villasboasi Mello-Leitão, 1949. The three species had similar karyotypes, with 2n = 28 (26 + X1 X2 0) in males, with sex chromosomes exhibiting positive heteropicnosis in meiotic cells. 18S rDNA mapping revealed gene sites at the terminal region of one chromosomal pair for all species, with one C. cruls individual, showing markings in two pairs. C. villasboasi showed markers only in the pachytene phase. The distribution pattern of constitutive heterochromatin was found to be characteristic for the genus, with markings in the centromeric region of all chromo-somes, suggesting an acrocentric morphology for all chromosomes of the three analysed species. The results support the fusion of sex chromosomes as an evolutionary tendency for this spider group. © 2020, Sociedade Brasileira de Genética. |
| metadata.dc.identifier.doi: | 10.1590/1678-4685-GMB-2020-0069 |
| Appears in Collections: | Artigos |
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| File | Size | Format | |
|---|---|---|---|
| artigo-inpa.pdf | 3,34 MB | Adobe PDF | View/Open |
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