Butterfly genome reveals promiscuous exchange of mimicry adaptations among species
It is inferred that closely related Heliconius species exchange protective colour-pattern genes promiscuously, implying that hybridization has an important role in adaptive radiation.
EVOLUTION OF DIVERSITY IN WARNING COLOR AND MIMICRY: Polymorphisms, Shifting
These contrasting patterns can be explained, in part, by the shape of a “number-dependent” selection function first modeled by Fritz Muller in 1879: Purifying selectio...
Chromosomal rearrangements maintain a polymorphic supergene controlling butterfly mimicry
The results indicate that allelic combinations at known wing-patterning loci have become locked together in a polymorphic rearrangement at the P locus, forming a supergene that acts as a simple switch between complex adaptive phenotypes found in sympatry.
Diversity in mimicry: paradox or paradigm?
Genomic islands of divergence in hybridizing Heliconius butterflies identified by large-scale targeted sequencing
- N. Nadeau, A. Whibley, C. Jiggins
- BiologyPhilosophical Transactions of the Royal Society B…
- 5 February 2012
Targeted next-generation sequence capture is used to survey patterns of divergence across these entire regions in divergent geographical races and species of Heliconius, finding major peaks of elevated population differentiation between races across hybrid zones, which indicate regions under strong divergent selection.
Adaptive Introgression across Species Boundaries in Heliconius Butterflies
Analysis of the role of introgressive hybridisation in transferring adaptations between mimetic Heliconius butterflies, taking advantage of the recent identification of a gene regulating red wing patterns in this genus, finds an almost perfect genotype by phenotype association across four species.
A Conserved Supergene Locus Controls Colour Pattern Diversity in Heliconius Butterflies
The results imply that a conserved yet relatively unconstrained mechanism underlying pattern switching can affect mimicry in radically different ways, and show that adaptive evolution, both convergent and diversifying, can occur by the repeated involvement of the same genomic regions.
Captivity masks inbreeding effects on male mating success in butterflies
It is shown that a small decrease in mating success of captive inbred male butterflies in cages is greatly accentuated in conditions with unconstrained flight, showing that the behaviours underlying patterns of mating can be profoundly influenced by a history of inbreeding or by any restraining experimental conditions.
Genomic architecture and introgression shape a butterfly radiation
Tests to distinguish incomplete lineage sorting from introgression indicate that gene flow has obscured several ancient phylogenetic relationships in this group over large swathes of the genome, and a hitherto unknown inversion that traps a color pattern switch locus is identified.
Genomic Hotspots for Adaptation: The Population Genetics of Müllerian Mimicry in Heliconius erato
Detailed characterize nucleotide variation, genotype-by-phenotype associations, linkage disequilibrium (LD), and candidate gene expression patterns across two unlinked genomic intervals that control yellow and red wing pattern variation among mimetic forms of Heliconius erato and provides convincing evidence for parallel changes in gene regulation across co-mimetic lineages.