Tatiana Giraud

Cheese adaptation beyond Penicillium: contrasting genomic trajectories in the distantly related Nectriaceae molds

This study compares genomic adaptations of cheese-associated Nectriaceae fungi, revealing contrasting evolutionary paths involving gene family expansions, reductions, and horizontal gene transfer.

Recombination persists near the mating-type locus in pseudo-homothallic Cladorrhinum fungi (Sordariales)

The paper investigates recombination near the mating-type locus in Cladorrhinum fungi, finding no evidence of large recombination suppression despite pseudo-homothallic life cycles.

Rapid speciation in small populations challenges the dominance of ecological speciation

This study shows that larger populations take longer to speciate, challenging the idea that ecological speciation drives much of species diversity.

A recent domestication event in Penicillium biforme, independent of the emblematic cheese mold P. camemberti

The paper identifies a new Penicillium biforme lineage, cheesy, selected for food fermentation, with genetic and phenotypic differences from P. camemberti and traits advantageous for cheesemaking.

The fate of mutations on Y chromosomes andautosomes: a unified Wright-Fisher frameworkaccounting for segregation time

This study develops a unified Wright-Fisher model to analyze mutation fate on Y chromosomes and autosomes, showing overdominant mutations are more likely to fix on Y chromosomes due to segregation time effects.

Stepwise recombination suppression around the mating-type locus associated with a diploid-like life cycle in Schizothecium fungi

The paper investigates recombination suppression around the mating-type locus in Schizothecium fungi, finding evolutionary strata associated with a diploid-like life cycle in pseudo-homothallic species.

EASYstrata: An All-in-One Workflow for Genome Annotation and Genomic Divergence Analysis

EASYstrata is a workflow for genome annotation and divergence analysis that detects recombination suppression and its effects, validated on fungal, plant, and animal genomes.

An ancient X chromosomal region harbours three genes potentially controlling sex determination in Cannabis sativa

The paper identifies a locus on the X chromosome in Cannabis sativa that contains three genes potentially controlling sex determination, with distinct expression patterns across monoecious and dioecious plants.

Stepwise expansion of recombination suppression on sex chromosomes and other supergenes through lower load advantage and deleterious mutation sheltering

This paper uses mathematical modeling and simulations to show how recombination suppression on sex chromosomes expands through sheltering from deleterious mutations and lower mutational load.

Loci under balancing selection facilitate the emergence of pseudo-overdominance and recombination suppression

The paper shows that balancing selection promotes pseudo-overdominance and recombination suppression in genomic regions.

Sheltered load in fungal mating-type chromosomes revealed by fitness experiments

The paper tests for sheltered load in fungal mating-type chromosomes by comparing growth rates of heterokaryons and homokaryons, finding faster growth in heterokaryons suggesting recessive deleterious mutations in non-recombining regions.

Repeated loss of function at HD mating-type genes and of recombination suppression without mating-type locus linkage in anther-smut fungi

The paper shows that HD mating-type genes have lost function in three Microbotryum species, with PR genes controlling mating compatibility, and reports evolutionary strata from recombination suppression.

Generation of diversity in the blue cheese mold Penicillium roqueforti and identification of pleiotropic QTL for key cheese-making phenotypes

This study identifies pleiotropic QTLs for key cheese-making traits in Penicillium roqueforti by analyzing F1 hybrids from cheese and non-cheese populations.

Huge genetic diversity of Schizothecium tetrasporum (Wint.). N. Lundq.: delimitation of 18 species distributed into three complexes through genome sequencing

The paper uses genome sequencing to delimit 18 species within the Schizothecium tetrasporum morpho-species, identifying three complexes based on genetic and breeding system differences.

Speciation completion rates have limited impact on macroevolutionary diversification

The paper examines how speciation completion rates affect macroevolutionary diversification by comparing standard birth-death models with a protracted birth-death model.

The Silene latifolia genome and its giant Y chromosome

This study sequences the giant Y chromosome of Silene latifolia and reveals its structure, function, and evolutionary history.

An old inversion polymorphism involving giant mobile elements in an invasive fungal pathogen

The paper identifies a non-recombining genomic region in the invasive fungus Cryphonectria parasitica linked to the mating-type locus, showing balanced haplotype segregation and potential adaptation through mobile elements.

Genetic differentiation in the MAT-proximal region is not sufficient for suppressing recombination in Podospora anserina

The paper tests if genetic divergence in the MAT-proximal region of Podospora anserina suppresses recombination, finding that sequence divergence alone is insufficient.

Deleterious mutations can contribute to the evolution of recombination suppression between sex chromosomes

This study supports the theory that recombination suppression on sex chromosomes evolves due to lower-load advantages and sheltering effects from recessive deleterious mutations.

High-quality genome assemblies of four members of the Podospora anserina species complex

The paper provides chromosome-level genome assemblies for four species in the Podospora anserina complex, along with a dataset of 28 annotated genomes, revealing genomic similarities and phylogenetic conflicts.

Domestication of different varieties in the cheese-making fungus Geotrichum candidum

This study analyzes whole-genome data from 98 Geotrichum candidum strains to show domestication led to genetic and phenotypic differentiation in cheese-making strains.