Journal
CURRENT BIOLOGY
Volume 32, Issue 1, Pages 111-+Publisher
CELL PRESS
DOI: 10.1016/j.cub.2021.10.052
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Funding
- NIH [R01GM121750, R00HG008696, R35GM138286, F32GM135998, K01DK119582]
- NSF Dimensions of Biodiversity award [1737752]
- Direct For Biological Sciences
- Division Of Environmental Biology [1737752] Funding Source: National Science Foundation
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Genome-scale sequence data has provided new opportunities for studying introgression in the genus Drosophila. By combining 155 genome assemblies with a fossil-calibrated phylogeny, we found widespread introgression across the evolutionary history of Drosophila.
Genome-scale sequence data have invigorated the study of hybridization and introgression, particularly in animals. However, outside of a few notable cases, we lack systematic tests for introgression at a larger phylogenetic scale across entire clades. Here, we leverage 155 genome assemblies from 149 species to generate a fossil-calibrated phylogeny and conduct multilocus tests for introgression across 9 monophyletic radiations within the genus Drosophila. Using complementary phylogenomic approaches, we identify widespread introgression across the evolutionary history of Drosophila. Mapping gene-tree discordance onto the phylogeny revealed that both ancient and recent introgression has occurred across most of the 9 clades that we examined. Our results provide the first evidence of introgression occurring across the evolutionary history of Drosophila and highlight the need to continue to study the evolutionary consequences of hybridization and introgression in this genus and across the tree of life.
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