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Functional and evolutionary analysis of b chromosomes using the Astyanax paranae fish (Characiformes Characidae) as model

Grant number: 14/09634-5
Support Opportunities:Regular Research Grants
Duration: February 01, 2015 - January 31, 2017
Field of knowledge:Biological Sciences - Genetics - Animal Genetics
Principal Investigator:Fausto Foresti
Grantee:Fausto Foresti
Host Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
Associated researchers:Claudio de Oliveira ; Diogo Teruo Hashimoto


Very recently, the power of next-generation sequencing (NGS) began to be applied to research on supernumerary chromosomes (B) of different organisms. However, this technology has not been applied to the B chromosomes in fish. Results of the Laboratory of Fish Biology and Genetics (IB/UNESP/Botucatu) show that a population of Astyanax paranae the Capivara river, Tietê River basin, has a large metacentric B chromosome. From the FISH technique the sequences of 18S rDNA and histone H1 were identified in this chromosome. It is considered, therefore, the possibility of the presence of ribosomal DNA and histone H1 being connected to the origin of the supernumerary chromosomes in this species. The identification of a symmetrical arrangement of these sequences in the arms of the B chromosome reinforces the hypothesis that their origin is due to the formation of an isochromosome. Thus, the aim of this project involves the investigation of the total genomic content of this B chromosome, and the identification of potentially functional regions, single copy genes, repetitive DNA and B-specific molecular markers through next-generation sequencing, aiming to study their origin, function and evolution from the chromosomes of the complement A. This project inserts into the overall program of cytogenetic studies of Neotropical fishes being developed in the Laboratory of Genetics and Biology of Fishes (IB/UNESP/Botucatu), aiming at a better understanding of chromosome structure of eukaryotic cells and in particular fish. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, DUILIO M. Z. DE A.; UTSUNOMIA, RICARDO; RUIZ-RUANO, FRANCISCO J.; DANIEL, SANDRO NATAL; PORTO-FORESTI, FABIO; HASHIMOTO, DIOGO TERUO; OLIVEIRA, CLAUDIO; CAMACHO, JUAN PEDRO M.; FORESTI, FAUSTO. High-throughput analysis unveils a highly shared satellite DNA library among three species of fish genus Astyanax. SCIENTIFIC REPORTS, v. 7, . (13/24367-0, 14/09634-5)
ZERBINATO DE ANDRADE SILVA, DUILIO MAZZONI; RUIZ-RUANO, FRANCISCO J.; UTSUNOMIA, RICARDO; MARTIN-PECINA, MARIA; PENA CASTRO, JONATHAN; PACCIELLI FREIRE, PAULA; FRANCISCO CARVALHO, ROBSON; HASHIMOTO, DIOGO T.; SUH, ALEXANDER; OLIVEIRA, CLAUDIO; et al. ong-term persistence of supernumerary B chromosomes in multiple species of Astyanax fis. BMC Biology, v. 19, n. 1, . (14/26508-3, 18/20610-1, 16/09204-6, 17/22447-8, 14/09634-5)
DUÍLIO MAZZONI ZERBINATO DE ANDRADE SILVA; CRISTIAN ARAYA-JAIME; MASAKANE YAMASHITA; MATEUS ROSSETTO VIDAL; CLAUDIO OLIVEIRA; FÁBIO PORTO-FORESTI; ROBERTO FERREIRA ARTONI; FAUSTO FORESTI. Meiotic self-pairing of the Psalidodon (Characiformes, Characidae) iso-B chromosome: A successful perpetuation mechanism. GENETICS AND MOLECULAR BIOLOGY, v. 44, n. 3, . (16/09204-6, 17/15608-5, 18/20610-1, 17/22447-8, 14/26508-3, 14/09634-5)

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