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    Genetic structuring of the coastal herb Arthropodium cirratum (Asparagaceae) is shaped by low gene flow, hybridization and prehistoric translocation

    Shepherd, L.D.; Bulgarella, M.; de Lange, Peter

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    Date
    2018-10-17
    Citation:
    Shepherd, L. D., Bulgarella, M., & de Lange, P. J. (2018). Genetic structuring of the coastal herb Arthropodium cirratum (Asparagaceae) is shaped by low gene flow, hybridization and prehistoric translocation. Plos One, 13(10), 1-14. doi:10.1371/journal.pone.0204943
    Permanent link to Research Bank record:
    https://hdl.handle.net/10652/4393
    Abstract
    We examined the genetic structuring of rengarenga (Arthropodium cirratum; Asparagaceae), an endemic New Zealand coastal herb, using nuclear microsatellite markers. This species was brought into cultivation by Māori within the last 700–800 years for its edible roots and was transplanted beyond its natural distribution as part of its cultivation. We found very high levels of genetic structuring in the natural populations (FST = 0.84), indicating low levels of gene flow. Reduced genetic diversity was found in the translocated populations, suggesting a large loss of genetic diversity early in the domestication process. The data indicates that rengarenga was brought into cultivation independently at least three times, with the sources of these introductions located within a narrow area encompassing about 250km of coastline. Hybridization was inferred between A. cirratum and the closely related A. bifurcatum, despite A. birfucatum not occurring in the vicinity.
    Keywords:
    Arthropodium, Asparagaceae, nuclear microsatellites, rengarenga, translocation
    ANZSRC Field of Research:
    060310 Plant Systematics and Taxonomy
    Copyright Holder:
    © 2018 Shepherd et al.

    Copyright Notice:
    This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
    Available Online at:
    https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0204943
    Rights:
    This digital work is protected by copyright. It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use. These documents or images may be used for research or private study purposes. Whether they can be used for any other purpose depends upon the Copyright Notice above. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
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