Complete plastid genome sequences of Drimys, Liriodendron, and Piper : implications for the phylogenetic relationships of magnoliids |
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| Authors: | Zhengqiu Cai Cynthia Penaflor Jennifer V Kuehl James Leebens-Mack John E Carlson Claude W de Pamphilis Jeffrey L Boore Robert K Jansen |
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| Affiliation: | (1) Section of Integrative Biology and Institute of Cellular and Molecular Biology, University of Texas, Patterson Laboratories 141, Austin, TX 78712, USA;(2) Biology Department, Brigham Young University, 373 WIDB, Provo, UT 84602, USA;(3) DOE Joint Genome Institute and Lawrence Berkeley National Laboratory, Walnut Creek, CA 94598, USA;(4) Department of Plant Biology, University of Georgia, Athens, GA, USA;(5) School of Forest Resources and Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA;(6) Department of Biology, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | ![]()
Background The magnoliids with four orders, 19 families, and 8,500 species represent one of the largest clades of early diverging angiosperms. Although several recent angiosperm phylogenetic analyses supported the monophyly of magnoliids and suggested relationships among the orders, the limited number of genes examined resulted in only weak support, and these issues remain controversial. Furthermore, considerable incongruence resulted in phylogenetic reconstructions supporting three different sets of relationships among magnoliids and the two large angiosperm clades, monocots and eudicots. We sequenced the plastid genomes of three magnoliids, Drimys (Canellales), Liriodendron (Magnoliales), and Piper (Piperales), and used these data in combination with 32 other angiosperm plastid genomes to assess phylogenetic relationships among magnoliids and to examine patterns of variation of GC content. |
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