Evolutionary insights of the zw sex chromosomes in snakes: A new chapter added by the amazonian puffing snakes of the genus spilotes
| Autor: | Tariq Ezaz, Eliana Feldberg, Marcelo de Bello Cioffi, Breno Jackson Almeida, Patrik F Viana |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Male
0106 biological sciences 0301 basic medicine Karyotype Evolution Sex Chromosome lcsh:QH426-470 Heterochromatin advanced snakes Snake Karyotype Clinical Comparative Genomic Hybridization Amazonian snakes 010603 evolutionary biology 01 natural sciences Genome Article Chromosome Painting repeat accumulation Evolution Molecular 03 medical and health sciences Genus Genetics Homologous chromosome Colubridae Animals Genetics (clinical) Repetitive Sequences Nucleic Acid CGH Comparative Genomic Hybridization biology sex chromosomes heterochromatin Snakes biology.organism_classification Nonhuman W chromosome lcsh:Genetics 030104 developmental biology Evolutionary biology Female Chromosome Puff Comparative genomic hybridization |
| Zdroj: | Repositório Institucional do INPA Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA Genes Volume 10 Issue 4 Genes, Vol 10, Iss 4, p 288 (2019) |
| Popis: | Amazonian puffing snakes (Spilotes Colubridae) are snakes widely distributed in the Neotropical region. However, chromosomal data are scarce in this group and, when available, are only limited to karyotype description using conventional staining. In this paper, we focused on the process of karyotype evolution and trends for sex chromosomes in two Amazonian Puffer Snakes (S. pulllatus and S. sulphureus). We performed an extensive karyotype characterization using conventional and molecular cytogenetic approaches. The karyotype of S. sulphureus (presented here for the first time) exhibits a 2n = 36, similar to that previously described in S. pullatus. Both species have highly differentiated ZZ/ZW sex chromosomes, where the W chromosome is highly heterochromatic in S. pullatus but euchromatic in S. sulphureus. Both W chromosomes are homologous between these species as revealed by cross-species comparative genomic hybridization, even with heterogeneous distributions of several repetitive sequences across their genomes, including on the Z and on the W chromosomes. Our study provides evidence that W chromosomes in these two species have shared ancestry. |
| Databáze: | OpenAIRE |
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