M. Joron

Positive and negative frequency-dependent selection acting on polymorphism in a palatable moth

The paper investigates frequency-dependent selection in a palatable moth with two color morphs, finding contrasting selection pressures that maintain polymorphism.

Subtle introgression footprints at the end of the speciation continuum in a clade of Heliconius butterflies

The paper examines gene flow and speciation in Heliconius butterflies, finding limited introgression and stronger genomic signatures in mimetic populations.

Supergene formation: evidence for recombination suppression among multiple functional loci within inversions.

The paper investigates supergene formation in Heliconius numata, showing chromosomal inversions suppress recombination among multiple loci controlling wing patterns, supporting the hypothesis that supergenes evolve through recombination suppression and subsequent recruitment of adaptive mutations.

Balancing selection at a wing pattern locus is associated with major shifts in genome-wide patterns of diversity and gene flow in a butterfly

The paper examines how balancing selection at a wing pattern locus in butterflies affects genome-wide diversity and gene flow, finding higher diversity and lower geographic structure in polymorphic populations.

Admixture can readily lead to the formation of supergenes

The paper shows that admixture can lead to supergene formation through the evolution of chromosomal inversions with recessive fitness costs.

Costs of choosiness can promote reproductive isolation in parapatry

The paper shows that weak costs of female choosiness can promote reproductive isolation in parapatric speciation by reducing indirect selection against strong choosiness.

Evolution and genetic architecture of disassortative mating at a locus under heterozygote advantage

This study models the evolution of disassortative mating under heterozygote advantage at a locus under balancing selection, showing that genetic architecture and selection regimes influence its emergence.

When do opposites attract? A model uncovering the evolution of disassortative mating

The paper models the evolution of disassortative mating and finds that heterozygote advantage and negative frequency-dependent viability selection promote its fixation, but also create a negative feedback loop limiting its prevalence.

Coevolution of male and female mate choice can destabilize reproductive isolation

This study shows that coevolving male and female mate choice can lead to periodic hybridization and destabilize reproductive isolation through deterministic preference cycling driven by stochasticity.

Mutation accumulation in chromosomal inversions maintains wing pattern polymorphism in a butterfly

The paper shows chromosomal inversions maintain wing pattern polymorphism in butterflies by accumulating recessive mutations that prevent fixation despite ecological advantages.

Classic and introgressed selective sweeps shape mimicry loci across a butterfly adaptive radiation

The paper analyzes genome sequences from Heliconius butterflies to show selection on color pattern loci, identifying both classic and introgressed selective sweeps.

Genomic architecture and introgression shape a butterfly radiation

The paper uses a low-cost genome assembly strategy to study Heliconius butterfly evolution, finding that introgression, not incomplete lineage sorting, explains most non-canonical genetic histories.

Generalisation behaviour of predators toward warning signals displayed by harmful prey: answers from a videogame played by humans.

This study uses a video game to investigate human generalisation behaviour toward warning signals of harmful prey, finding that learning is more efficient in simpler communities and that visual similarity affects prey vulnerability.

Supergene evolution triggered by the introgression of a chromosomal inversion

The paper shows that supergene alleles in Heliconius numata butterflies arise from introgression of a chromosomal inversion, leading to balanced polymorphism and mimicry polymorphism.

What shapes the continuum of reproductive isolation? Lessons from Heliconius butterflies.

This study examines reproductive isolation in Heliconius butterflies, finding that increased divergence leads to stronger barriers, with wing pattern being important early on but not essential for speciation.

North Andean origin and diversification of the largest ithomiine butterfly genus

This study uses molecular and morphological data to reconstruct the phylogeny of the butterfly genus Pteronymia, showing its origin in the Northern Andes and diversification patterns.