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Molecular evolution of regulatory regions of HOX genes associated with fin morphology in fishes, with special emphasis in Chondrichthyes

Grant number: 13/05292-0
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): June 03, 2013
Effective date (End): July 02, 2013
Field of knowledge:Biological Sciences - Zoology
Principal researcher:Marcelo Rodrigues de Carvalho
Grantee:Murilo de Carvalho
Supervisor abroad: Hsuan-Ching Ho
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: National Museum of Marine Biology and Aquarium, Taiwan  
Associated to the scholarship:12/05152-0 - Molecular evolution of regulatory regions of HOX genes associated with the morphology of fish fins, with special emphasis on Chondrichthyes, BP.PD


The evolution of regions of gene regulation, particularly of genes expressed during embryonic development, appears to be directly related to evolutionary processes resulting in the origin of new morphologies, since variations in regulatory regions determine changes in gene expression patterns during formation specific structures. The postdoctoral project linked to this proposal aims to investigate associations between the nucleotide sequence of the regulatory region CsB, which controls the expression of genes closest to the 5' end of the HoxD cluster (i.e. Hoxd11 and Hoxd13) during the formation of the bud of paired appendices in vertebrates. It will be studied condrictes species representing most of the morphological variation of the fins of the major clades (i.e. Squalomorphi and Galeomorphi) and compared with representatives of major groups of Actinopterygii. Therefore, the ideal progress of this project depends on obtaining taxa representing such morphological diversity, as well as to provide tissues for molecular studies as specified in postdoctoral project. This proposal is made on the request of the "Bolsa de Estágio de Pesquisa no Exterior" (BEPE) to carry out the research stage at the institution "National Museum of Marine Biology and Aquarium" (NMMBA), Checheng, Taiwan. Eventually, fish collections in Japan, such as Fish Collection of Hokkaido University, could be visited in order to provide further sampling. I also plan to attend the 9th Indo-Pacific Fishes Congress in Okinawa, also in Japan, in which we will be presenting a poster. (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)
WEIGMANN, SIMON; VAZ, DIEGO F. B.; WHITE, WILLIAM T.; DE CARVALHO, MARCELO R.; THIEL, RALF. Distribution and comments on the morphology of Centroscymnus owstonii Garman, 1906 (Squaliformes: Somniosidae), with focus on its occurrence in the Indian Ocean. MARINE BIODIVERSITY, v. 46, n. 3, p. 641-653, . (12/09877-0, 13/13137-4, 12/05152-0, 12/05391-5, 12/07712-3, 13/05292-0)
WHITE, WILLIAM T.; VAZ, DIEGO F. B.; HO, HSUAN-CHING; EBERT, DAVID A.; DE CARVALHO, MARCELO R.; CORRIGAN, SHANNON; ROCHEL, ELISABETH; DE CARVALHO, MURILO; TANAKA, SHO; NAYLOR, GAVIN J. P.. Redescription of Scymnodon ichiharai Yano and Tanaka 1984 (Squaliformes: Somniosidae) from the western North Pacific, with comments on the definition of somniosid genera. ICHTHYOLOGICAL RESEARCH, v. 62, n. 2, p. 213-229, . (12/09877-0, 13/13137-4, 12/05152-0, 12/05391-5, 12/07712-3, 13/05292-0)

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