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Introgression: fine scale mapping between populations of two cactophilic species of Drosophila from South America

Grant number: 19/21781-7
Support type:Regular Research Grants
Duration: May 01, 2020 - April 30, 2023
Field of knowledge:Biological Sciences - Genetics - Animal Genetics
Principal researcher:Maura Helena Manfrin
Grantee:Maura Helena Manfrin
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Assoc. researchers: Dora Yovana Barrios Leal ; Fábio de Melo Sene


Introgressive hybridization or introgression results from a process in which the effective transfer of genetic material between species occurs through hybridization and backcrossing and represents a source of variation for the introgressed population. However, it is still poorly understood if there is an evolutionary pattern for this process, its consequences and influences for the evolutionary lineages delimitations and adaptive processes. In this project we will investigate the genomic landscape of populations in a secondary contact area of two species with signs of introgression in order to describe genomic areas that are more prone to introgression, their relationships with local adaptation and behavior, if there are signs of linkage disequilibrium and selection, associating these events with geographic, ecological and temporal information. The area to be investigated involves populations from a secondary contact between the cactophilic species of Drosophila serido and D.antonietae in the coastal region of Santa Catarina and Rio Grande do Sul states. Research data from our group for this area showed hybrids and nuclear and mitochondrial DNA introgression and some ecological segregation among populations related to the host cacti. In this project we intend to obtain data searching for DNA polymorphisms from genomic analyzes. Information about the introgression process will be obtained through bioinformatics analysis, principal components, linkage disequilibrium analysis, Paterson D statistics, signatures of selection and others. As a result, we hope to define areas and genes resulting from introgression and make inferences of the spatial and temporal importance of this event for populations and species at the contact area. (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)
BARRIOS-LEAL, DORA YOVANA; MENEZES, RODOLPHO S. T.; RIBEIRO, JOAO VICTOR; BIZZO, LUIZ; DE SENE, FABIO MELO; NEVES-DA-ROCHA, JOAO; MANFRIN, MAURA HELENA. A holocenic and dynamic hybrid zone between two cactophilic Drosophila species in a coastal lowland plain of the Brazilian Atlantic Forest. JOURNAL OF EVOLUTIONARY BIOLOGY, v. 34, n. 11, . (19/21781-7)

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