Systematics Section / ASPT
Nepal, Madhav P. , Mayfield, Mark H. , Ferguson, Carolyn J. .
Phylogenetic relationships of Morus L. (Moraceae) inferred from nuclear and chloroplast DNA sequences.
Morus L. (tribe Moreae; Moraceae) comprises ca. 13 species and has a wide geographical distribution with taxa occurring in Asia, Europe, Africa, and North, Central and South America. It is of economic importance to the silkworm industry. Its biogeography, overlapping ranges of many taxa and putative hybridization present interesting questions of taxonomy, phylogeny and biogeography of the genus. In this study, we used sequence data from the Internal Transcribed Spacer region (ITS) of the nrDNA and the chloroplast trnL-trnF region to study phylogenetic relationships. Phylogenies based on these separate data sets are congruent and a combined analysis yields a well-resolved and supported phylogeny for Morus. There is a monophyletic core group of Morus with two well-supported geographical clades, one including Asian taxa and one of North American taxa. Morus mesozygia (Africa) and M. insignis (Central and South America) fall outside of this core clade; furthermore, inclusion of close relatives as part of the ingroup suggests Morus, as currently circumscribed, may not be monophyletic. This finding is discussed in relation to the other, broader studies on systematics of the Moraceae.
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1 - Kansas State University, Herbarium and Division of Biology, Ackert Hall, Manhattan, Kansas, 66506-4901, USA
Presentation Type: Poster:Posters for Sections
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM