4.7 Article

Intraspecific differentiation of Limonium wrightii (Plumbaginaceae) on northwestern Pacific Islands: Rate heterogeneity in nuclear rDNA and its distance-independent geographic structure

Journal

MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 53, Issue 3, Pages 1032-1036

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2009.06.011

Keywords

Daito Islands; Geographic structure; ITS; Limonium wrightii; Northwestern Pacific; Plumbaginaceae; Rate heterogeneity; Subtropics

Funding

  1. University of the Ryukyus
  2. Ministry of Education, Culture, Sports, Science, and Technology of Japan

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We conducted a molecular phylogenetic analysis of a coastal sea lavender in NW Pacific using ITS sequences of nrDNA. As a result, the ITS sequences of populations on the oceanic Daito Islands were considerably different from conspecific others in nine apomorphic substitutions. This finding indicates a distance-independent geographical structure of the genetic variation among islands in NW Pacific. The calibrated rate of nucleotide substitutions in the ITS regions within L. wrightii (average: 1.41 x 10(-8) substitutions per site per year) was higher than any other instances of substitution rates in flowering plants. (C) 2009 Published by Elsevier Inc.

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