Comparative analysis based on replication banding reveals the mechanism responsible for the difference in the karyotype constitution of treefrogs Ololygon and Scinax (Arboranae, Hylidae, Scinaxinae)
| Autor: | Célio F. B. Haddad, Sanae Kasahara, Gabriela Isabela Gomes de Oliveira, Simone Lilian Gruber, Ana Paula Zampieri Silva, Hideki Narimatsu |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Hylidae comparative cytogenetics lcsh:QH426-470 Scinax ruber Zoology Plant Science 010603 evolutionary biology 01 natural sciences 5-bromodeoxiuridine Amphibia 03 medical and health sciences Genus Genetics Animalia Scinax catharinae Chordata Scinax biology Chromosome karyotype evolution Karyotype ScinaxAnimalia biology.organism_classification NOR lcsh:Genetics 030104 developmental biology Animal Science and Zoology Ploidy Anura Biotechnology |
| Zdroj: | Comparative Cytogenetics, Vol 11, Iss 2, Pp 267-283 (2017) Comparative Cytogenetics 11(2): 267-283 |
| ISSN: | 1993-0771 |
| Popis: | According to the recent taxonomic and phylogenetic revision of the family Hylidae, species of the former Scinaxcatharinae (Boulenger, 1888) clade were included in the resurrected genus Ololygon Fitzinger, 1843, while species of the Scinaxruber (Laurenti, 1768) clade were mostly included in the genus Scinax Wagler, 1830, and two were allocated to the newly created genus JulianusDuellman et al., 2016. Although all the species of the former Scinax genus shared a diploid number of 2n = 24 and the same fundamental number of chromosome arms of FN = 48, two karyotypic constitutions were unequivocally recognized, related mainly to the distinct size and morphology of the first two chromosome pairs. Some possible mechanisms for these differences had been suggested, but without any experimental evidence. In this paper, a comparison was carried out based on replication chromosome banding, obtained after DNA incorporation of 5-bromodeoxiuridine in chromosomes of Ololygon and Scinax. The obtained results revealed that the loss of repetitive segments in chromosome pairs 1 and 2 was the mechanism responsible for karyotype difference. The distinct localization of the nucleolus organizer regions in the species of both genera also differentiates the two karyotypic constitutions. |
| Databáze: | OpenAIRE |
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