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Contrasting genomic and phenotypic outcomes of hybridization between pairs of mimetic butterfly taxa across a suture zone
- Source :
- Molecular Ecology, Molecular Ecology, Wiley, 2020, 29 (7), pp.1328-1343. ⟨10.1111/mec.15403⟩, Molecular Ecology, 2020, 29 (7), pp.1328-1343. ⟨10.1111/mec.15403⟩
- Publication Year :
- 2019
-
Abstract
- International audience; Hybrid zones, whereby divergent lineages come into contact and eventually hybridize, can provide insights on the mechanisms involved in population differentiation and reproductive isolation, and ultimately speciation. Suture zones offer the opportunity to compare these processes across multiple species. In this paper we use reduced-complexity genomic data to compare the genetic and phenotypic structure and hybridization patterns of two mimetic butterfly species, Ithomia salapia and Oleria onega (Nymphalidae: Ithomiini), each consisting of a pair of lineages differentiated for their wing colour pattern and that come into contact in the Andean foothills of Peru. Despite similarities in their life history, we highlight major differences, both at the genomic and phenotypic level, between the two species. These differences include the presence of hybrids, variations in wing phenotype, and genomic patterns of introgression and differentiation. In I. salapia, the two lineages appear to hybridize only rarely, whereas in O. onega the hybrids are not only more common, but also genetically and phenotypically more variable. We also detected loci statistically associated with wing colour pattern variation, but in both species these loci were not over-represented among the candidate barrier loci, suggesting that traits other than wing colour pattern may be important for reproductive isolation. Our results contrast with the genomic patterns observed between hybridizing lineages in the mimetic Heliconius butterflies, and call for a broader investigation into the genomics of speciation in Ithomiini - the largest radiation of mimetic butterflies.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Reproductive Isolation
Genotype
Genetic Speciation
Population
Genome, Insect
introgression
Genetic admixture
Introgression
010603 evolutionary biology
01 natural sciences
Nymphalidae
Polymorphism, Single Nucleotide
03 medical and health sciences
Peru
Genetics
Heliconius
Animals
Wings, Animal
education
Hybridization
Ecology, Evolution, Behavior and Systematics
Hybrid
[SDV.EE]Life Sciences [q-bio]/Ecology, environment
education.field_of_study
biology
[SDV.BA]Life Sciences [q-bio]/Animal biology
Reproductive isolation
differentiation
biology.organism_classification
Ithomiini
030104 developmental biology
admixture mapping
Genetics, Population
Phenotype
Evolutionary biology
Hybridization, Genetic
Butterflies
mimicry
Subjects
Details
- ISSN :
- 1365294X and 09621083
- Volume :
- 29
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Molecular ecologyREFERENCES
- Accession number :
- edsair.doi.dedup.....2d3161ed4a46628f05d9ce01d5e5d40c