ArticleGenetics and molecular biology2020
Heterochromatin and microsatellites detection in karyotypes of four sea turtle species: Interspecific chromosomal differences.
Article in Genetics and molecular biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 13 citations in OpenAlex.
- Chromosome-level genome assembly and methylome profile yield insights for the conservation of endangered loggerhead sea turtles.GigaScience · 2025Article
- Microsatellite repeat mapping shows inner chromosomal diversification in highly conserved karyotypes of Asian cyprinid fishes.Comparative cytogenetics · 2025Article
- Comparative molecular and conventional cytogenetic analyses of three species of Rhinella (Anura; Bufonidae).PloS one · 2024Article
- Comparative cytogenetics among Boana species (Anura, Hylidae): focus on evolutionary variability of repetitive DNA.Genetics and molecular biology · 2023Article
- Telomere organization and the interstitial telomeric sites involvement in insects and vertebrates chromosome evolution.Genetics and molecular biology · 2022Article
- Why Do Some Vertebrates Have Microchromosomes?Cells · 2021Review
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Authors and funding
7 authors at 5 institutions in 1 country.
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Abstract
The wide variation in size and content of eukaryotic genomes is mainly attributed to the accumulation of repetitive DNA sequences, like microsatellites, which are tandemly repeated DNA sequences. Sea turtles share a diploid number (2n) of 56, however recent molecular cytogenetic data have shown that karyotype conservatism is not a rule in the group. In this study, the heterochromatin distribution and the chromosomal location of microsatellites (CA)n, (GA)n, (CAG)n, (GATA)n, (GAA)n, (CGC)n and (GACA)n in Chelonia mydas, Caretta caretta, Eretmochelys imbricata and Lepidochelys olivacea were comparatively investigated. The obtained data showed that just the (CA)n, (GA)n, (CAG)n and (GATA)n microsatellites were located on sea turtle chromosomes, preferentially in heterochromatic regions of the microchromosomes (mc). Variations in the location of heterochromatin and microsatellites sites, especially in some pericentromeric regions of macrochromosomes, corroborate to proposal of centromere repositioning occurrence in Cheloniidae species. Furthermore, the results obtained with the location of microsatellites corroborate with the temperature sex determination mechanism proposal and the absence of heteromorphic sex chromosomes in sea turtles. The findings are useful for understanding part of the karyotypic diversification observed in sea turtles, especially those that explain the diversification of Carettini from Chelonini species.
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