Repetitive DNAs and chromosome evolution in Megaleporinus obtusidens and M. reinhardti (Characiformes: Anostomidae)

Dulz, Thais Aparecida; Azambuja, Matheus; Lorscheider, Carla Andrea; Noleto, Rafael Bueno; Moreira-Filho, Orlando; Nogaroto, Viviane; Nascimento, Viviane Demetrio; Diniz, Débora; de Mello Affonso, Paulo Roberto Antunes; Vicari, Marcelo Ricardo

doi:10.1007/s10709-024-00206-3

Genetica

2024

DOI: 10.1007/s10709-024-00206-3

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Repetitive DNAs and chromosome evolution in Megaleporinus obtusidens and M. reinhardti (Characiformes: Anostomidae)

Thais Aparecida Dulz,

Matheus Azambuja,

Carla Andrea Lorscheider

et al.

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2024

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Comparative analysis of transposable elements dynamics in fish with different sex chromosome systems

Crepaldi,

Cabral-de-Mello,

Parise-Maltempi

2024

Genome

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Transposable elements (TEs) are widespread genomic components with substantial roles in genome evolution and sex chromosome differentiation. In this study, we compared the TE composition of three closely related fish with different sex chromosome systems: Megaleporinus elongatus (Z1Z1Z2Z2/Z1W1Z2W2), Megaleporinus macrocephalus (ZZ/ZW) (both with highly differentiated W sex chromosomes), and Leporinus friderici (without heteromorphic sex chromosomes). We created custom TE libraries for each species using clustering methods and manual annotation and prediction, and we predicted TE temporal dynamics through divergence-based analysis. The TE abundance ranged from 16 to 21% in the three mobilomes, with L. friderici having the lowest overall. Despite the recent amplification of TEs in all three species, we observed differing expansion activities, particularly between the two genera. Both Megaleporinus recently experienced high retrotransposon activity, with a reduction in DNA TEs, which could have implications in sex chromosome composition. In contrast, L. friderici showed the opposite pattern. Therefore, despite having similar TE compositions, Megaleporinus and Leporinus exhibit distinct TE histories that likely evolved after their separation, highlighting a rapid TE expansion over short evolutionary periods.

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Comparative analysis of transposable elements dynamics in fish with different sex chromosome systems

Crepaldi,

Cabral-de-Mello,

Parise-Maltempi

2024

Genome

View full text Add to dashboard Cite

show abstract

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Repetitive DNAs and chromosome evolution in Megaleporinus obtusidens and M. reinhardti (Characiformes: Anostomidae)

Cited by 1 publication

References 55 publications

Comparative analysis of transposable elements dynamics in fish with different sex chromosome systems

Comparative analysis of transposable elements dynamics in fish with different sex chromosome systems

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