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Recent Topics Posters

Zhou, Ping [1], Shaw, A.J. [1], Menzel, Florian [1].

Taxonomical delimitation and phylogenetic relationship of Sphagnum macrophyllum, S. cribrosum and S. cribrosum wave form.

To clarify the long-standing disagreement about the taxonomic status of Sphagnum macrophyllum and S. cribrosum, twenty-five samples of S. macrophyllum and twenty-four of S. cribrosum (including S. cribrosum wave form) were obtained for phylogenetic analysis. The data set included the following intensive sampling from three populations in North Carolina: seven samples of S. macrophyllum, six samples of S. cribrosum and nine samples of S. cribrosum wave form. Three anonymous regions (RAPDa, RAPDb and RAPDf) were sequenced for all the samples, and two LEAFY introns (Leafy1 and Leafy2) and one chloroplast locus (TrnG) were sequenced for all the samples excluding the twenty-two North Carolina samples above. The results showed that S. macrophyllum and S. cribrosum are reciprocally monophyletic with maximum parsimony bootstrap support and Bayesian posterior probability support. And the three anonymous regions contributed 77% of phylogenetic signal, which suggested that they are suitable for testing the phylogeny of closely related Sphagnum species. This study also shows that the clade of S. cribrosum wave form from Singletary Lake, North Carolina, is more closely related to the samples of S. cribrosum normal form from Florida than to the samples of normal form from the same lake in North Carolina, which suggested that the wave form may be a genetically based morphotype.


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1 - Duke University, Department of Biology, 139 Biological Sciences Building, PO Box 90338, Durham, North Carolina, 27708, USA
2 - Duke University, Department of Biology, 139 Biological Sciences Building, PO Box 90338, Durham, North Carolina, 27708, USA

Keywords:
systematics
Sphagnum macrophyllum
Sphagnum cribrosum
Sphagnum cribrosum wave form
Maximum parsimony
Bayesian
Reciprocal monophyly.

Presentation Type: Recent Topics Poster
Session: 33-126
Location: Salon C, D & E - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 12:30 PM
Abstract ID:665


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