Madeiran Arabidopsis thaliana reveals ancient long-range colonization and clarifies demography in Eurasia

Andrea Fulgione*, Maarten Koornneef, Fabrice Roux, Joachim Hermisson, Angela M. Hancock

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)

    Abstract

    The study of model organisms on islands may shed light on rare long-range dispersal events, uncover signatures of local evolutionary processes, and inform demographic inference on the mainland. Here, we sequenced the genomes of Arabidopsis thaliana samples from the oceanic island of Madeira. These samples include the most diverged worldwide, likely a result of long isolation on the island. We infer that colonization of Madeira happened between 70 and 85 ka, consistent with a propagule dispersal model (of size 10), or with an ecological window of opportunity. This represents a clear example of a natural long-range dispersal event in A. thaliana. Long-term effective population size on the island, rather than the founder effect, had the greatest impact on levels of diversity, and rates of coalescence. Our results uncover a selective sweep signature on the ancestral haplotype of a known translocation in Eurasia, as well as the possible importance of the low phosphorous availability in volcanic soils, and altitude, in shaping early adaptations to the island conditions. Madeiran genomes, sheltered from the complexities of continental demography, help illuminate ancient demographic events in Eurasia. Our data support a model in which two separate lineages of A. thaliana, one originating in Africa and the other from the Caucasus expanded and met in Iberia, resulting in a secondary contact zone there. Although previous studies inferred that the westward expansion of A. thaliana coincided with the spread of human agriculture, our results suggest that it happened much earlier (20-40 ka).

    Original languageEnglish
    Pages (from-to)564-574
    JournalMolecular Biology and Evolution
    Volume35
    Issue number3
    DOIs
    Publication statusPublished - 1 Mar 2018

    Fingerprint

    Eurasia
    demography
    Arabidopsis
    Islands
    colonization
    Arabidopsis thaliana
    Demography
    demographic statistics
    Genome
    Madeira Islands
    Founder Effect
    volcanic soils
    genome
    secondary contact
    Portugal
    founder effect
    volcanic soil
    Population Density
    Agriculture
    Iberian Peninsula

    Keywords

    • Admixture
    • Arabidopsis thaliana
    • Demography
    • Island
    • Population genetics
    • Relict

    Cite this

    Fulgione, Andrea ; Koornneef, Maarten ; Roux, Fabrice ; Hermisson, Joachim ; Hancock, Angela M. / Madeiran Arabidopsis thaliana reveals ancient long-range colonization and clarifies demography in Eurasia. In: Molecular Biology and Evolution. 2018 ; Vol. 35, No. 3. pp. 564-574.
    @article{dead81a8196b4cb69d4eddc3205c236c,
    title = "Madeiran Arabidopsis thaliana reveals ancient long-range colonization and clarifies demography in Eurasia",
    abstract = "The study of model organisms on islands may shed light on rare long-range dispersal events, uncover signatures of local evolutionary processes, and inform demographic inference on the mainland. Here, we sequenced the genomes of Arabidopsis thaliana samples from the oceanic island of Madeira. These samples include the most diverged worldwide, likely a result of long isolation on the island. We infer that colonization of Madeira happened between 70 and 85 ka, consistent with a propagule dispersal model (of size 10), or with an ecological window of opportunity. This represents a clear example of a natural long-range dispersal event in A. thaliana. Long-term effective population size on the island, rather than the founder effect, had the greatest impact on levels of diversity, and rates of coalescence. Our results uncover a selective sweep signature on the ancestral haplotype of a known translocation in Eurasia, as well as the possible importance of the low phosphorous availability in volcanic soils, and altitude, in shaping early adaptations to the island conditions. Madeiran genomes, sheltered from the complexities of continental demography, help illuminate ancient demographic events in Eurasia. Our data support a model in which two separate lineages of A. thaliana, one originating in Africa and the other from the Caucasus expanded and met in Iberia, resulting in a secondary contact zone there. Although previous studies inferred that the westward expansion of A. thaliana coincided with the spread of human agriculture, our results suggest that it happened much earlier (20-40 ka).",
    keywords = "Admixture, Arabidopsis thaliana, Demography, Island, Population genetics, Relict",
    author = "Andrea Fulgione and Maarten Koornneef and Fabrice Roux and Joachim Hermisson and Hancock, {Angela M.}",
    year = "2018",
    month = "3",
    day = "1",
    doi = "10.1093/molbev/msx300",
    language = "English",
    volume = "35",
    pages = "564--574",
    journal = "Molecular Biology and Evolution",
    issn = "0737-4038",
    publisher = "Oxford University Press",
    number = "3",

    }

    Madeiran Arabidopsis thaliana reveals ancient long-range colonization and clarifies demography in Eurasia. / Fulgione, Andrea; Koornneef, Maarten; Roux, Fabrice; Hermisson, Joachim; Hancock, Angela M.

    In: Molecular Biology and Evolution, Vol. 35, No. 3, 01.03.2018, p. 564-574.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Madeiran Arabidopsis thaliana reveals ancient long-range colonization and clarifies demography in Eurasia

    AU - Fulgione, Andrea

    AU - Koornneef, Maarten

    AU - Roux, Fabrice

    AU - Hermisson, Joachim

    AU - Hancock, Angela M.

    PY - 2018/3/1

    Y1 - 2018/3/1

    N2 - The study of model organisms on islands may shed light on rare long-range dispersal events, uncover signatures of local evolutionary processes, and inform demographic inference on the mainland. Here, we sequenced the genomes of Arabidopsis thaliana samples from the oceanic island of Madeira. These samples include the most diverged worldwide, likely a result of long isolation on the island. We infer that colonization of Madeira happened between 70 and 85 ka, consistent with a propagule dispersal model (of size 10), or with an ecological window of opportunity. This represents a clear example of a natural long-range dispersal event in A. thaliana. Long-term effective population size on the island, rather than the founder effect, had the greatest impact on levels of diversity, and rates of coalescence. Our results uncover a selective sweep signature on the ancestral haplotype of a known translocation in Eurasia, as well as the possible importance of the low phosphorous availability in volcanic soils, and altitude, in shaping early adaptations to the island conditions. Madeiran genomes, sheltered from the complexities of continental demography, help illuminate ancient demographic events in Eurasia. Our data support a model in which two separate lineages of A. thaliana, one originating in Africa and the other from the Caucasus expanded and met in Iberia, resulting in a secondary contact zone there. Although previous studies inferred that the westward expansion of A. thaliana coincided with the spread of human agriculture, our results suggest that it happened much earlier (20-40 ka).

    AB - The study of model organisms on islands may shed light on rare long-range dispersal events, uncover signatures of local evolutionary processes, and inform demographic inference on the mainland. Here, we sequenced the genomes of Arabidopsis thaliana samples from the oceanic island of Madeira. These samples include the most diverged worldwide, likely a result of long isolation on the island. We infer that colonization of Madeira happened between 70 and 85 ka, consistent with a propagule dispersal model (of size 10), or with an ecological window of opportunity. This represents a clear example of a natural long-range dispersal event in A. thaliana. Long-term effective population size on the island, rather than the founder effect, had the greatest impact on levels of diversity, and rates of coalescence. Our results uncover a selective sweep signature on the ancestral haplotype of a known translocation in Eurasia, as well as the possible importance of the low phosphorous availability in volcanic soils, and altitude, in shaping early adaptations to the island conditions. Madeiran genomes, sheltered from the complexities of continental demography, help illuminate ancient demographic events in Eurasia. Our data support a model in which two separate lineages of A. thaliana, one originating in Africa and the other from the Caucasus expanded and met in Iberia, resulting in a secondary contact zone there. Although previous studies inferred that the westward expansion of A. thaliana coincided with the spread of human agriculture, our results suggest that it happened much earlier (20-40 ka).

    KW - Admixture

    KW - Arabidopsis thaliana

    KW - Demography

    KW - Island

    KW - Population genetics

    KW - Relict

    U2 - 10.1093/molbev/msx300

    DO - 10.1093/molbev/msx300

    M3 - Article

    VL - 35

    SP - 564

    EP - 574

    JO - Molecular Biology and Evolution

    JF - Molecular Biology and Evolution

    SN - 0737-4038

    IS - 3

    ER -