Genetic structures of Calophyllum inophyllum L., a tree employing sea-drift seed dispersal in the northern extreme of its distributionReport as inadecuate




Genetic structures of Calophyllum inophyllum L., a tree employing sea-drift seed dispersal in the northern extreme of its distribution - Download this document for free, or read online. Document in PDF available to download.

1 Forest Tree Breeding Center, Forestry and Forest Products Research Institute 2 Taiwan Forestry Research Institute, 3 Faculty of Agriculture, Kyushu University 4 Forestry and Forest Products Research Institute

Abstract : • Context Little is known about the potential of gene flow and resulting genetic structures of trees employing sea-drifting seed dispersal in island populations. • Aims Current genetic structure and the magnitude of histor-ical gene flow were estimated in island populations of Calophyllum inophyllum L., a typical plant employing sea-drifting seed dispersal. • Methods Samples were collected from the northern extreme of the species- distribution Taiwan and the Sakishima, Daito, and Ogasawara Islands, Japan and genotyped using 15 EST-SSR markers. Genetic differentiation F ST and AMOVA, genetic structure STRUCTRE analysis, and historical gene flow assignment testing were determined. • Results Frequent gene flow within and rare gene flow among island groups was determined using assignment testing. Clear genetic structures were also detected using the STRUCTURE analysis, which demonstrated differentia-tion between dominant clusters among geographically con-structed island groups. • Conclusions The potential for gene flow via sea-drifting seed dispersal was high, and this was possible even among small islands. However, the extent and frequency of gene flow were not great enough to prevent genetic differentiation in a range of over a few hundred kilometers.





Author: So Hanaoka - Ching-Te Chien - Shun-Ying Chen - Atsushi Watanabe - Suzuki Setsuko - Kazutaka Kato -

Source: https://hal.archives-ouvertes.fr/



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