Evolutionary insights of the zw sex chromosomes in snakes

A new chapter added by the amazonian puffing snakes of the genus spilotes

Patrik F. Viana, Tariq Ezaz, Marcelo De Bello Cioffi, Breno Jackson Almeida, Eliana Feldberg

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number288
Pages (from-to)1-16
Number of pages16
JournalGenes
Volume10
Issue number4
DOIs
Publication statusPublished - Apr 2019

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Sex Chromosomes
Snakes
Karyotype
Chromosomes
Colubridae
Tetraodontiformes
Comparative Genomic Hybridization
Nucleic Acid Repetitive Sequences
Cytogenetics
Genome
Staining and Labeling

Cite this

Viana, Patrik F. ; Ezaz, Tariq ; Cioffi, Marcelo De Bello ; Almeida, Breno Jackson ; Feldberg, Eliana. / Evolutionary insights of the zw sex chromosomes in snakes : A new chapter added by the amazonian puffing snakes of the genus spilotes. In: Genes. 2019 ; Vol. 10, No. 4. pp. 1-16.
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abstract = "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.",
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Evolutionary insights of the zw sex chromosomes in snakes : A new chapter added by the amazonian puffing snakes of the genus spilotes. / Viana, Patrik F.; Ezaz, Tariq; Cioffi, Marcelo De Bello; Almeida, Breno Jackson; Feldberg, Eliana.

In: Genes, Vol. 10, No. 4, 288, 04.2019, p. 1-16.

Research output: Contribution to journalArticle

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