My research focuses on answering evolutionary questions using genomic data. I worked on a variety of approach such as population genomics, quantitative genetics, phylogenetics and comparative genomics.

The experience gained in these different topics led me to develop a more specific interest in how heritable biological information interacts with an organism's environment to produce phenotypic variation and how such variation drives evolution.

Current projects

Lyme disease


Lyme disease is transmitted by a tick borne bacteria of the Borrelia genus. Bacteria of the Borrelia genus have some but very complex genomes constitued of a linear chromosome and many linear and circular plasmids. Using long read sequencing, I am reconstructing genomes of different Borrelia strains in order to learn more about the geographic spread and genome evolution of this human pathogen.

Poplar


Wood is widely used as a renewable material and energy source thanks to its physical and chemical properties. Tailoring wood properties for human usage is therefore important for many sectors. Using whole genome sequencing, I searched for large effect genetic variants that could rapidly be used in molecular breeding to modify wood properties. I focused on disruptive variants, defined as small genetic variants changing gene coding sequences and resulting in a deleterious effect on gene products.

Past projects

GENOSCAN


As part of the GENOSCAN project, I reconstructed the population structure of black spruce individuals growing inside and around a mining area in northern Québec. After sampling biological material from spruce individuals, we used Genotyping-By-Sequencing (GBS) data to identify genome-wide variants across the studied individuals and reconstruct their underying population structure.

C4 photosynthesis


C4 photosynthesis evolved multiple times in the grass family (Poaceae) from the ancestral C3 photosynthesis state, reprensenting an amazing case of parallel evolution. Using more than a hundred chloroplast genomes from numerous grass species and replacing them in a phylogenetic context we identified one gene (rbcL) under strong positive selection following the C3-C4 transition, while one third of plastid genes were found to be have evolved under positive selection in across all the studied species.