Hybrid speciation driven by multilocus introgression of ecological traits

• 成果类型: Article
• 署名作者: Rosser, Neil; Seixas, Fernando; Queste, Lucie M.; Cama, Bruna; Mori-Pezo, Ronald; Kryvokhyzha, Dmytro; Nelson, Michaela; Waite-Hudson, Rachel; Goringe, Matt; Costa, Mauro; Elias, Marianne; Mendes Eleres de Figueiredo, Clarisse; Freitas, Andre Victor Lucci; Joron, Mathieu; Kozak, Krzysztof; Lamas, Gerardo; Martins, Ananda R. P.; McMillan, W. Owen; Ready, Jonathan; Rueda-Munoz, Nicol; Salazar, Camilo; Salazar, Patricio; Schulz, Stefan; Shirai, Leila T.; Silva-Brandao, Karina L.; Mallet, James; Dasmahapatra, Kanchon K.
• 署名单位: Harvard University; University of York - UK; Universidad Nacional Autonoma de Alto Amazonas; Lund University; Universite PSL; Ecole Pratique des Hautes Etudes (EPHE); Sorbonne Universite; Museum National d'Histoire Naturelle (MNHN); Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Ecology & Environment (INEE); Smithsonian Institution; Smithsonian Tropical Research Institute; Universidade Federal do Para; Universidade de Sao Paulo; Universidade Estadual de Campinas; Universidade Estadual de Campinas; Universidade de Sao Paulo; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Ecology & Environment (INEE); Universite PSL; Ecole Pratique des Hautes Etudes (EPHE); Institut Agro; Montpellier SupAgro; CIRAD; Institut de Recherche pour le Developpement (IRD); Universite Paul-Valery; Universite de Montpellier; Universidad Nacional Mayor de San Marcos; McGill University; Universidad del Rosario; University of Sheffield; Braunschweig University of Technology; University of York - UK
• 刊物名称: Nature
• ISSN/ISSBN: 0028-6617
• DOI: 10.1038/s41586-024-07263-w
• 发表日期: 2024-04-25
• 关键词: whole-genome association; tool set; FRAMEWORK; EVOLUTION; mimicry; simulation; DISCOVERY; inference; admixture; selection

摘要

Hybridization allows adaptations to be shared among lineages and may trigger the evolution of new species 1,2 . However, convincing examples of homoploid hybrid speciation remain rare because it is challenging to demonstrate that hybridization was crucial in generating reproductive isolation 3 . Here we combine population genomic analysis with quantitative trait locus mapping of species-specific traits to examine a case of hybrid speciation in Heliconius butterflies. We show that Heliconius elevatus is a hybrid species that is sympatric with both parents and has persisted as an independently evolving lineage for at least 180,000 years. This is despite pervasive and ongoing gene flow with one parent, Heliconius pardalinus, which homogenizes 99% of their genomes. The remaining 1% introgressed from the other parent, Heliconius melpomene, and is scattered widely across the H. elevatus genome in islands of divergence from H. pardalinus. These islands contain multiple traits that are under disruptive selection, including colour pattern, wing shape, host plant preference, sex pheromones and mate choice. Collectively, these traits place H. elevatus on its own adaptive peak and permit coexistence with both parents. Our results show that speciation was driven by introgression of ecological traits, and that speciation with gene flow is possible with a multilocus genetic architecture. Genomic studies of Heliconius butterflies provide evidence that Heliconius elevatus is a hybrid species, and that its speciation was driven by introgression of traits from Heliconius melpomene into the other parent, an ancestor of Heliconius pardalinus.