ArticlePLoS genetics2019
Parental legacy, demography, and admixture influenced the evolution of the two subgenomes of the tetraploid Capsella bursa-pastoris (Brassicaceae).
Article in PLoS genetics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.
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35 citing papers in PubMed, 63 citations in OpenAlex.
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- The Genetic Consequences of Range Expansion and Its Influence on Diploidization in Polyploids.The American naturalist · 2025Article
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- The genetic consequences of range expansion and its influence on diploidization in polyploids.bioRxiv : the preprint server for biology · 2024Article
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- Demographic history inference and the polyploid continuum.Genetics · 2023Article
- Global biodiversity data suggest allopolyploid plants do not occupy larger ranges or harsher conditions compared with their progenitors.Ecology and evolution · 2023Article
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- Molecular mechanisms of adaptive evolution in wild animals and plants.Science China. Life sciences · 2023Review
- Ancestral self-compatibility facilitates the establishment of allopolyploids in Brassicaceae.Plant reproduction · 2023Review
- Population genomics and subgenome evolution of the allotetraploid frog Xenopus laevis in southern Africa.G3 (Bethesda, Md.) · 2023Article
- The evolution of the hypotetraploidFrontiers in plant science · 2023Article
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Authors and funding
14 authors at 3 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Allopolyploidy is generally perceived as a major source of evolutionary novelties and as an instantaneous way to create isolation barriers. However, we do not have a clear understanding of how two subgenomes evolve and interact once they have fused in an allopolyploid species nor how isolated they are from their relatives. Here, we address these questions by analyzing genomic and transcriptomic data of allotetraploid Capsella bursa-pastoris in three differentiated populations, Asia, Europe, and the Middle East. We phased the two subgenomes, one descended from the outcrossing and highly diverse Capsella grandiflora (CbpCg) and the other one from the selfing and genetically depauperate Capsella orientalis (CbpCo). For each subgenome, we assessed its relationship with the diploid relatives, temporal changes of effective population size (Ne), signatures of positive and negative selection, and gene expression patterns. In all three regions, Ne of the two subgenomes decreased gradually over time and the CbpCo subgenome accumulated more deleterious changes than CbpCg. There were signs of widespread admixture between C. bursa-pastoris and its diploid relatives. The two subgenomes were impacted differentially depending on geographic region suggesting either strong interploidy gene flow or multiple origins of C. bursa-pastoris. Selective sweeps were more common on the CbpCg subgenome in Europe and the Middle East, and on the CbpCo subgenome in Asia. In contrast, differences in expression were limited with the CbpCg subgenome slightly more expressed than CbpCo in Europe and the Middle-East. In summary, after more than 100,000 generations of co-existence, the two subgenomes of C. bursa-pastoris still retained a strong signature of parental legacy but their evolutionary trajectory strongly varied across geographic regions.
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