Evolutionary Genomics & Bioinformatics BSc and MSc Thesis Projects -2022

Oferta de pràcticums, TFG i TFM a la Facultat de Biologia

Molecular evolution of animal chemosensory-related gene families

My research group is interested in to explore how functional divergence and pleiotropy affects the organization, structure, and molecular evolution of multigene families in animal genomes, with a special focus on their consequences for adaptation. My research model are the gene families encoding insect chemoreceptors (i.e., odorant, gustatory and ionotropic receptors). My approximation to the problem is rooted in comparative and population genomics and I use integrated computational and analytical tools to address evolutionary and mechanistic questions. As a member of the European Drosophila Population Genomics consortium (DrosEU), we have access to population genomics data from a large set of populations distributed across the continent, including different latitudes (and climates) and seasonal data. This specific subproject aims to investigate the relationship between the distribution of fitness effects (DFE) of mutations (both deleterious and adaptive) in the three main chemoreceptor families, and pleiotropy (i.e., the number of traits affected by these mutations, which will be approached by gene expression data available for the members of these families).
2020 Project Tasks to be carried out by the student:

The student will participate in the calculation of the DFE in the tree surveyed families and in the identification of potentially specific amino acids that are key targets during climate adaptation in European population of D. melanogaster. She/He will use population genomic data (pool-seq data from multiple populations) and bioinformatics tools (specific software for calculating the DFE and in-house scripts to manipulate and visualize sequences and genomic annotations) to calculate de DFE of mutations in different gene families from allele frequency data. The data will be analyzed and interpreted under the theoretical framework of population genetics. Many of these analyses will be carried out in the high performance computer cluster of the EGB space.

Expected student skills:

Basic knowledge on molecular population genetics, and/or on NGS data handling and analysis. Experience with Linux operating systems, and one of the programing languages commonly used in bioinformatics (Perl, Python, R) are desirable.

Project supervisor:

Alejandro Sánchez-Gracia (elsanchez@ub.edu)

See other projects in the EG&B Web page.

Software developed in the research group:

Publications of the EGB research group: