Integration of Maps Enables a Cytogenomics Analysis of the Complete Karyotype in Solea senegalensis
Metadatos
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MDPI
Materia
Solea senegalensis Pleuronectiformes Genetic maps Cytogenomics Chromosome evolution Karyotype Repetitive sequences Comparative genomics
Date
2022-05-11Referencia bibliográfica
Ramírez, D... [et al.]. Integration of Maps Enables a Cytogenomics Analysis of the Complete Karyotype in Solea senegalensis. Int. J. Mol. Sci. 2022, 23, 5353. [https://doi.org/10.3390/ijms23105353]
Patrocinador
RTI2018-096847B-C21 AND RTI2018-096847-B-C22 SPANISH MINISTRY OF ECONOMY AND COMPETITIVENESS -FEDERRésumé
The Pleuronectiformes order, which includes several commercially-important species, has
undergone extensive chromosome evolution. One of these species is Solea senegalensis, a flatfish with
2n = 42 chromosomes. In this study, a cytogenomics approach and integration with previous maps
was applied to characterize the karyotype of the species. Synteny analysis of S. senegalensis was
carried out using two flatfish as a reference: Cynoglossus semilaevis and Scophthalmus maximus. Most
S. senegalensis chromosomes (or chromosome arms for metacentrics and submetacentrics) showed a
one-to-one macrosyntenic pattern with the other two species. In addition, we studied how repetitive
sequences could have played a role in the evolution of S. senegalensis bi-armed (3, and 5–9) and
acrocentric (11, 12 and 16) chromosomes, which showed the highest rearrangements compared
with the reference species. A higher abundance of TEs (Transposable Elements) and other repeated
elements was observed adjacent to telomeric regions on chromosomes 3, 7, 9 and 16. However, on
chromosome 11, a greater abundance of DNA transposons was detected in interstitial BACs. This
chromosome is syntenic with several chromosomes of the other two flatfish species, suggesting
rearrangements during its evolution. A similar situation was also found on chromosome 16 (for
microsatellites and low complexity sequences), but not for TEs (retroelements and DNA transposons).
These differences in the distribution and abundance of repetitive elements in chromosomes that
have undergone remodeling processes during the course of evolution also suggest a possible role for
simple repeat sequences in rearranged regions.