ibclogo XVI International Botanical Congess

Abstract Number: 6164
Poster No. = 2556


PHYLOGENY OF OSMUNDACEAE INFERRED FROM rbcL NUCLEOTIDE SEQUENCES


Yoko Yatabe1, Harufumi Nishida2 and Noriaki Murakami1, 1Department of Botany, Graduate School of Science, Kyoto University, Kyoto 606-8502, JAPAN 2Laboratory of Biosphere Sciences, Faculty of Science and Technology, Chuo University, Tokyo 112-8551, JAPAN


We determined rbcL sequences (1,231bp) of 12 species and 14 accession of Osmundaceae. Our sampling covered all three genera (Osmunda, Todea and Leptopteris) and most extant species of the family. We conducted a molecular phylogenetic analyses with the following conclusions. Osmunda subgenus Osmundastrum is a polyphyletic group. Osmunda cinnamomea and O. claytoniana were shown to be very distantly related. Osmunda cinnamomea is most basally diverged species in Osmundaceae, and we can call it as a living fossil fern because a fossil species (O. claytoniites) with almost the same morphology as this species was recorded from the Triassic.

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