期刊
PLOS BIOLOGY
卷 20, 期 12, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pbio.3001914
关键词
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资金
- Academy of Finland [328961]
- HiLIFE
- Royal Society University Research Fellowship [URF\R1\180682]
- Fundacao Ciencia e Tecnologia [CEECINST/00032/2018/CP1523/CT0008, UIDB/00329/2020]
- Academy of Finland (AKA) [328961] Funding Source: Academy of Finland (AKA)
Our study demonstrates predictable evolution over short timescales after admixture in 3 hybrid ant populations, where selection leads to correlated sorting of genetic variation and haplotypes with positive selection signatures are more likely to fix in hybrids.
Hybridization is frequent in the wild but it is unclear when admixture events lead to predictable outcomes and if so, at what timescale. We show that selection led to correlated sorting of genetic variation rapidly after admixture in 3 hybrid Formica aquilonia x F. polyctena ant populations. Removal of ancestry from the species with the lowest effective population size happened in all populations, consistent with purging of deleterious load. This process was modulated by recombination rate variation and the density of functional sites. Moreover, haplotypes with signatures of positive selection in either species were more likely to fix in hybrids. These mechanisms led to mosaic genomes with comparable ancestry proportions. Our work demonstrates predictable evolution over short timescales after admixture in nature.
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