Multiple instances of river-lake introgression in the adaptive radiation of sailfin silversides in Wallace’s Dreampond DOI Creative Commons
Els L. R. De Keyzer,

Fabian Herder,

Astrid Böhne

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Abstract While adaptive radiations significantly contribute to the world’s biodiversity, much is unknown about genetic and ecological factors underlying these rapid successions of speciation. It has been suggested that hybridisation can facilitate speciation process by generating diversity on which diversifying selection act. Sailfin silverside fishes (Telmatherinidae) in Malili Lakes system Sulawesi have diversified within last 2 million years. We assembled annotated a chromosome-scale reference genome riverine sailfin Telmatherina bonti generated whole sequences all species Lake Matano, South Sulawesi, Indonesia, one oldest deepest lakes. reconstructed phylogenetic relationships radiation silversides inferred past ongoing introgression patterns. Genome-wide tests confirmed two monophyletic clades, sharpfins roundfins. However, we found mismatches between morphology-based taxonomic assignments genome-wide relationships. signs both old river-dwelling T. lacustrine sharpfin group, as shown elevated D-statistic, f4-ratio f-branch statistic. Levels excess allele sharing three most common declined with increasing distance from river-inlet, indicating at lake-river interface. This combination radiating flock makes Matano particularly valuable study fundamental mechanisms driving under genomic exchange. The phylogenomic framework elaborated this provides foundation for studies processes shaping charismatic radiation.

Language: Английский

Whole‐genome data shed light on speciation and within‐species differentiation of the Papilio machaon complex around the Mediterranean Basin DOI Creative Commons
Louis F. Cassar, Benoît Nabholz, Eliette L. Reboud

et al.

Systematic Entomology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Abstract Within swallowtail butterflies, the type species Papilio machaon Linnaeus has fostered many studies leading to a complex taxonomy. With >40 subspecies formally recognized in Palaearctic and recently simplified 14 subspecies, there is still need address taxonomic delineation within this complex. A previous phylogenomic analysis including Holarctic revealed that P. formed several monophyletic groups, treat saharae Oberthür as Nearctic separate ( bairdii Edwards). Here, we aim at testing boundaries relationships Western using whole‐genome data of taxa from Mediterranean region, which include first draft genomes hospiton Géné (41× coverage depth) (51× depth). We refined boundary confirmed status . assessed limits through Bayesian multispecies coalescent inferences population genomic analyses, indicating simplification needed, with exclusion North Africa mauretanica Verity, comb. nov .) synonymy neosaharae Tarrier, syn. .). heterogeneous levels heterozygosity between island continental lineages warrant further actions. also found evidence low gene flow Corsican , endemic Corsica (and Sardinia). discuss how speciation phylogeographic patterns are line past climatic geological changes Basin.

Language: Английский

Citations

0
Multiple instances of river-lake introgression in the adaptive radiation of sailfin silversides in Wallace’s Dreampond DOI Creative Commons
Els L. R. De Keyzer,

Fabian Herder,

Astrid Böhne

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Abstract While adaptive radiations significantly contribute to the world’s biodiversity, much is unknown about genetic and ecological factors underlying these rapid successions of speciation. It has been suggested that hybridisation can facilitate speciation process by generating diversity on which diversifying selection act. Sailfin silverside fishes (Telmatherinidae) in Malili Lakes system Sulawesi have diversified within last 2 million years. We assembled annotated a chromosome-scale reference genome riverine sailfin Telmatherina bonti generated whole sequences all species Lake Matano, South Sulawesi, Indonesia, one oldest deepest lakes. reconstructed phylogenetic relationships radiation silversides inferred past ongoing introgression patterns. Genome-wide tests confirmed two monophyletic clades, sharpfins roundfins. However, we found mismatches between morphology-based taxonomic assignments genome-wide relationships. signs both old river-dwelling T. lacustrine sharpfin group, as shown elevated D-statistic, f4-ratio f-branch statistic. Levels excess allele sharing three most common declined with increasing distance from river-inlet, indicating at lake-river interface. This combination radiating flock makes Matano particularly valuable study fundamental mechanisms driving under genomic exchange. The phylogenomic framework elaborated this provides foundation for studies processes shaping charismatic radiation.

Language: Английский

Citations

0