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Uncovering the sex-biased genes expression in Orthoptera, using as model the cricket Gryllus assimilis

Grant number: 16/01506-3
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): June 01, 2016
Effective date (End): May 31, 2017
Field of knowledge:Biological Sciences - Genetics - Animal Genetics
Principal Investigator:Diogo Cavalcanti Cabral de Mello
Grantee:Octavio Manuel Palacios Gimenez
Supervisor: Bernardo Lemos Ferreira da Silva
Host Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Research place: Harvard University, Cambridge, United States  
Associated to the scholarship:14/02038-8 - Evolutionary patterns of sex chromosome systems in crickets: an integrated analysis using cytogenetics and genomics, BP.DR

Abstract

Orthoptera insects have a wide range of sex-determining systems including X0, neo-XY, neo-X1X2Y and X1X20, that putatively has independent origin and evolution with distinct degrees of heteromorphization, heterochromatinization and repetitive DNA accumulation. Although this diversity of sex determining systems has been extensively studied at the cytogenetic level, little has been analyzed at the genomic level, and little is known about X-chromosome biology in this order. In this study we will take advantage of RNA-seq data obtained from distinct tissues from the cricket Gryllus assimilis (X0/XX) to perform a comparative analysis of the gene content and expression of the X chromosome between sexes, autosomes, and sex-biased genes expression. Moreover, the generated data will be also used for comparison of satellite DNAs (satDNAs) expression analysis between sexes of X-linked sequences that were recently analyzed and recovered through genome analysis. In this point, the possible functional roles of satDNAs regarding the regulation gene, chromatin modulation or as functional components of important chromosomes structures like telomere, centromeres and sex chromosomes will be tested. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
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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)
PALACIOS-GIMENEZ, OCTAVIO MANUEL; BARDELLA, VANESSA BELLINI; LEMOS, BERNARDO; CABRAL-DE-MELLO, DIOGO CAVALCANTI. Satellite DNAs are conserved and differentially transcribed among Gryllus cricket species. DNA Research, v. 25, n. 2, p. 137-147, . (15/16661-1, 16/01506-3, 14/11763-8)

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