Genomic data reveal a protracted window of introgression during the diversification of a neotropical woodcreeper radiation
| Autor: | Alexandre Aleixo, Paola Pulido-Santacruz, Jason T. Weir |
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| Přispěvatelé: | Zoology |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Neotropics Reproductive Isolation AMAZONIA introgression DIVERSITY Introgression Subspecies Genetic Introgression 010603 evolutionary biology 01 natural sciences Genome Gene flow 03 medical and health sciences GENE FLOW Genetics Animals CONNECTIONS Passeriformes hybridization Mexico Ecology Evolution Behavior and Systematics Phylogenetic tree biology Dendrocincla Central America Reproductive isolation 15. Life on land South America CLIMATIC CHANGES biology.organism_classification ATLANTIC FOREST Biological Evolution EVOLUTION Woodcreeper 030104 developmental biology speciation Evolutionary biology 1181 Ecology evolutionary biology Species richness ADAPTIVE INTROGRESSION General Agricultural and Biological Sciences |
| Zdroj: | Evolution; international journal of organic evolutionLITERATURE CITED. 74(5) |
| ISSN: | 1558-5646 |
| Popis: | The incidence of introgression during the diversification process and the timespan following divergence when introgression is possible are poorly understood in the neotropics where high species richness could provide extensive opportunities for genetic exchange. We used thousands of genome-wide SNPs to infer phylogenetic relationships, calculate ages of splitting, and to estimate the timing of introgression in a widespread avian neotropical genus of woodcreepers. Five distinct introgression events were reconstructed involving taxa classified both as subspecies and species including lineages descending from the basal-most split, dated to 7.3 million years ago. Introgression occurred between just a few hundred thousand to about 2.5 million years following divergence, suggesting substantial portions of the genome are capable of introgressing across taxa boundaries during a protracted time window of a few million years following divergence. Despite this protracted time window, we found that the proportion of the genome introgressing (6-11%) declines with the time of introgression following divergence, suggesting that the genome becomes progressively more immune to introgression as reproductive isolation increases. |
| Databáze: | OpenAIRE |
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