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Phylogeny of the fern genus Melpomene (polypodiaceae) inferred from morphology and chloroplast DNA analysis


Lehnert, M; Kessler, M; Schmidt-Lebuhn, A N; Klimas, S A; Fehlberg, S D; Ranker, T A (2009). Phylogeny of the fern genus Melpomene (polypodiaceae) inferred from morphology and chloroplast DNA analysis. Systematic Botany, 34(1):17-27.

Abstract

Guided by systematic studies on Melpomene, we tested the monophyly of the genus by analyzing sequences of cpDNA (atpβ, rbcL) and morphological characters for 24 of the 29 recognized species. The atpβ data did not yield any resolution of the investigated group. The other data sets each supported the monophyly of the genus, as did all data combined, and indicate it to be sister to the Lellingeria apiculata group as proposed in previous studies. While the morphologically distinct M. leptostoma and M. gracilis are basal lineages with long branch lengths, most of the relationships within the core genus are weakly supported and have very short branch lengths. This indicates a recent radiation of the genus in the northern Andes, its center of diversity, apparently under the influence of the fast up lift of the mountain range and of glacial fluctuations of the vegetation zones, with subsequent dispersals to the Guyana Highlands, the Brazilian shield, and Africa.

Abstract

Guided by systematic studies on Melpomene, we tested the monophyly of the genus by analyzing sequences of cpDNA (atpβ, rbcL) and morphological characters for 24 of the 29 recognized species. The atpβ data did not yield any resolution of the investigated group. The other data sets each supported the monophyly of the genus, as did all data combined, and indicate it to be sister to the Lellingeria apiculata group as proposed in previous studies. While the morphologically distinct M. leptostoma and M. gracilis are basal lineages with long branch lengths, most of the relationships within the core genus are weakly supported and have very short branch lengths. This indicates a recent radiation of the genus in the northern Andes, its center of diversity, apparently under the influence of the fast up lift of the mountain range and of glacial fluctuations of the vegetation zones, with subsequent dispersals to the Guyana Highlands, the Brazilian shield, and Africa.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Systematic and Evolutionary Botany
Dewey Decimal Classification:580 Plants (Botany)
Language:English
Date:2009
Deposited On:07 Apr 2009 18:30
Last Modified:17 Feb 2018 22:47
Publisher:American Society of Plant Taxonomists
ISSN:0363-6445
OA Status:Closed
Publisher DOI:https://doi.org/10.1600/036364409787602276
Official URL:http://www.ingentaconnect.com/content/aspt/sb/2009/00000034/00000001/art00005

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