Abstract
A preliminary molecular analysis based on trnL-F region is presented for 17 taxa of Davalliaceae in Peninsular Malaysia. Maximum parsimony and Bayesian analysis were conducted on the dataset in order to establish a robust phylogenetic relationship between taxa. The results of analysis indicate incongruence with morphological classification. All genera of Davalliaceae in the study area are paraphyletic except Araiostegia which is represented by only a single species. In addition it partially agrees with recent phylogeny base on rbcL data.
Highlights
Davalliaceae is a moderate-sized family of ferns with about 50–60 species in four currently accepted genera (Nooteboom 1992, 1994, 1998, Schneider et al 2002), which is restricted to the Old World tropics and subtropics
All species of Davalliaceae reported to occur in Peninsular Malaysia by the most recent studies (Parris & Latiff 1997, Nooteboom 1998) have been collected from the field for DNA extraction, except for Humata parvula and Leucostegia pallida which were not found in reported localities during field work
The first lineage is formed by Araiostegia hymenophylloides, the second one is weakly supported and consists of a trichotomy of two partially resolved groups, a very weakly supported clade (DCII): including Scyphularia – D. solida, a well-supported clade consisting of all representatives of D. trichomanoides and a well-supported clade consisting of a Davallia clade (DC1) and a Humata clade (HC)
Summary
Davalliaceae is a moderate-sized family of ferns with about 50–60 species in four currently accepted genera (Nooteboom 1992, 1994, 1998, Schneider et al 2002), which is restricted to the Old World tropics and subtropics. AtpBrbcL spacer, and rbcl-accd spacer), and indicated that none of the genera in the family was monophyletic: Araiostegia and Davallia were divided into two and three clades respectively, and Humata and Scyphularia were paraphyletic. This finding did not support either the traditional classification of the genus or the division into two sections suggested by Nooteboom (1992, 1994). The present study uses a fast-evolving chloroplast region, trnL-F, to infer the phylogeny of Davalliaceae in Peninsular Malaysia and to test the generic and sectional classification within the group. The present study has a more complete taxon sampling of Malaysian members of the family than has been used before
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