M. G. Ritchie

Speciation on a complex landscape; phylogeny and demography of Mexican Goodeid fish.

This study uses genomic data to analyze the evolutionary history and speciation mechanisms of Mexican Goodeid fish, finding rapid divergence, gene flow between isolated species, and positive selection linked to live-bearing reproduction.

Genomic signatures associated with transitions to viviparity in Cyprinodontiformes

This study investigates molecular convergence during independent transitions to viviparity in Cyprinodontiformes fish, finding no excess of convergence in amino acid substitutions or sequence divergence.

Selection on the fly: short term adaptation to an altered sexual selection regime in Drosophila pseudoobscura

This study examines adaptation in Drosophila pseudoobscura under altered sexual selection regimes over 200 generations, finding genomic signatures of adaptation and differences in effective population size across chromosomes.

Divergence and introgression among the virilis group of Drosophila

The paper examines introgression and divergence patterns in the virilis group of Drosophila using genome data, finding three subgroups, ancient introgression, and gene flow impacts on adaptation and speciation.

DrosoPhyla: genomic resources for drosophilid phylogeny and systematics

The paper develops genomic markers and constructs phylogenetic trees for 704 Drosophilidae species to clarify evolutionary relationships and resolve taxonomic uncertainties.

Experimental sexual selection reveals rapid evolutionary divergence in sex-specific transcriptomes and their interactions following mating

This study shows that sexual selection treatments significantly affect transcriptomic divergence and postmating responses in Drosophila pseudoobscura reproductive tissues.

The discovery, distribution and diversity of DNA viruses associated with Drosophila melanogaster in Europe

The paper identifies and characterizes DNA viruses in Drosophila melanogaster across Europe, revealing new viral lineages and prevalence patterns.

Experimental evolution confirms signatures of sexual selection in genomic divergence.

This study uses experimental evolution to show that sexual selection drives genomic divergence in Drosophila pseudoobscura, with divergence concentrated in X-linked regions and associated with sex-biased gene expression and selection signatures.

The Pleistocene species pump past its prime: evidence from European butterfly sister species

The paper estimates divergence times for European butterfly sister species using genome-wide transcriptome data, finding most diverged before the Pleistocene and showing contact zones are not limited to early speciation stages.

Sex-specific responses to cold in a very cold-tolerant, northern Drosophila species

The paper examines sex-specific responses to cold in Drosophila montana, finding reduced sexually dimorphic gene expression and metabolic shifts in males and females.

Within-population sperm competition intensity does not predict asymmetry in conpopulation sperm precedence

The paper shows conpopulation sperm precedence is asymmetric and not linked to within-population sperm competition intensity in Drosophila montana.

Cold adaptation drives population genomic divergence in the ecological specialist, Drosophila montana

This study identifies genomic signatures of cold adaptation in Drosophila montana by linking genetic differentiation to climatic variables and phenotypic traits.

Genomic analysis of European Drosophila populations reveals major longitudinal structure, continent-wide selection, and unknown DNA viruses

The paper analyzes genomic variation in European Drosophila populations, revealing longitudinal structure, continent-wide selection, and new DNA viruses.

Silent crickets reveal the genomic footprint of recent adaptive trait loss

The paper examines the genomic effects of recent sexual signal loss in crickets, finding pleiotropy, hitchhiking, and regulatory disruption associated with the trait loss.