R
Ricardo Utsunomia
Researcher at Universidade Federal Rural do Rio de Janeiro
Publications - 52
Citations - 882
Ricardo Utsunomia is an academic researcher from Universidade Federal Rural do Rio de Janeiro. The author has contributed to research in topics: B chromosome & Chromosome. The author has an hindex of 16, co-authored 45 publications receiving 694 citations. Previous affiliations of Ricardo Utsunomia include Sao Paulo State University & University of Granada.
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Journal ArticleDOI
Delimiting the Origin of a B Chromosome by FISH Mapping, Chromosome Painting and DNA Sequence Analysis in Astyanax paranae (Teleostei, Characiformes)
Duílio Mazzoni Zerbinato de Andrade Silva,José Carlos Pansonato-Alves,Ricardo Utsunomia,Cristian Araya-Jaime,Francisco J. Ruiz-Ruano,Sandro Natal Daniel,Diogo Teruo Hashimoto,Claudio Oliveira,Juan Pedro M. Camacho,Fábio Porto-Foresti,F. Foresti +10 more
TL;DR: The population hereby analysed showed a female-biased B chromosome presence suggesting that B chromosomes in this species could influence sex determinism, and the hypothesis that the B chromosome of A. paranae is an isochromosome is supported.
Journal ArticleDOI
Uncovering the Ancestry of B Chromosomes in Moenkhausia sanctaefilomenae (Teleostei, Characidae).
Ricardo Utsunomia,Duílio Mazzoni Zerbinato de Andrade Silva,Francisco J. Ruiz-Ruano,Cristian Araya-Jaime,José Carlos Pansonato-Alves,Priscilla Cardim Scacchetti,Diogo Teruo Hashimoto,Claudio Oliveira,Vladmir A. Trifonov,Fábio Porto-Foresti,Juan Pedro M. Camacho,Fausto Foresti +11 more
TL;DR: To investigate the origin of these B chromosomes, a combination of molecular cytogenetic techniques, nucleotide sequence analysis and high-throughput sequencing showed that B chromosomes have not yet reached the Paranapanema River basin and are mitotically unstable.
Journal ArticleDOI
Single origin of sex chromosomes and multiple origins of B chromosomes in fish genus Characidium
José Carlos Pansonato-Alves,Érica Alves Serrano,Ricardo Utsunomia,Juan Pedro M. Camacho,Guilherme José da Costa Silva,Marcelo Ricardo Vicari,Roberto Ferreira Artoni,Claudio Oliveira,Fausto Foresti +8 more
TL;DR: Whereas heteromorphic sex chromosomes in the genus Characidium appear to have had a common and unique origin, B chromosomes may have had independent origins in different species, showing that molecular phylogenetic analysis is an excellent complement for cytogenetic studies by unveiling the direction of evolutionary chromosome changes.
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Chromosomal organization of repetitive DNA sequences in Astyanax bockmanni (Teleostei, Characiformes): dispersive location, association and co-localization in the genome.
Duílio Mazzoni Zerbinato de Andrade Silva,José Carlos Pansonato-Alves,Ricardo Utsunomia,Sandro Natal Daniel,Diogo Teruo Hashimoto,Claudio Oliveira,Fábio Porto-Foresti,Fausto Foresti +7 more
TL;DR: The results indicate that dispersion and variability of 18S rDNA and heterochromatin sites are not associated with macro rearrangements in the chromosome structure of these populations, and data obtained indicate that distinct mechanisms drive the spreading of repetitive DNAs in the genome of A. bockmanni.
Journal ArticleDOI
Mapping five repetitive DNA classes in sympatric species of Hypostomus (Teleostei: Siluriformes: Loricariidae): analysis of chromosomal variability
José Carlos Pansonato-Alves,Érica Alves Serrano,Ricardo Utsunomia,Priscilla Cardim Scacchetti,Claudio Oliveira,Fausto Foresti +5 more
TL;DR: The results evidenced that chromosomal variations are not restricted to differences in diploid number or karyotypic macrostructure in the genus Hypostomus, indicating that events such as transposition of heterochromatin and rDNA segments may participate in the differentiation process occurred in these species.