Cytogenetic analysis of four central Amazonian species of Colostethus (Anura - Dendrobatidae) with a diploid complement of 22 chromosomes
Colostethus marchesianus from the type locality and three related species had 2n = 22 chromosomes, which differed from most other Colostethus species that have 2n = 24 chromosomes. The species analyzed were morphologically similar and showed a conservative karyotype, although they could be distingui...
| Autor principal: | Veiga-Menoncello, Ana Cristina Prado |
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| Outros Autores: | Lima, Albertina Pimental, Pimentel, Shirlei Maria Recco |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Hereditas
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18961 |
| Resumo: |
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Colostethus marchesianus from the type locality and three related species had 2n = 22 chromosomes, which differed from most other Colostethus species that have 2n = 24 chromosomes. The species analyzed were morphologically similar and showed a conservative karyotype, although they could be distinguished from each other by their C-banding pattern. Additional NOR sites, heteromorphism in NOR size and heterochromatin, and an additional rDNA site detected by FISH, were observed. These data suggest that chromosomal rearrangements and hetrochromatin-related events may have contributed to the karyotype differentiation of these Colostethus. |