Using matK sequence data to unravel the phylogeny of Casuarinaceae

Casuarinaceae are a Gondwanic family with a unique combination of morphological characters not comparable to any other family. Until recently, the 96 species in the family were classified in a single genus, Casuarina s.l. A recent morphological revision of the family resulted in the splitting of Cas...

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Bibliographic Details
Published in:Molecular phylogenetics and evolution 2003-07, Vol.28 (1), p.47-59
Main Authors: Steane, Dorothy A, Wilson, Karen L, Hill, Robert S
Format: Article
Language:English
Subjects:
Allocasuarina
Base Sequence
Bayes Theorem
Casuarinaceae
Ceuthostoma
DNA Primers - genetics
Endoribonucleases - genetics
Gymnostoma
Magnoliopsida - classification
Magnoliopsida - genetics
matK gene
Molecular Sequence Data
monophyly
Nucleotidyltransferases - genetics
Phylogeny
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Summary:Casuarinaceae are a Gondwanic family with a unique combination of morphological characters not comparable to any other family. Until recently, the 96 species in the family were classified in a single genus, Casuarina s.l. A recent morphological revision of the family resulted in the splitting of Casuarina s.l. into four genera— Allocasuarina, Casuarina s.s., Ceuthostoma, and Gymnostoma. This study uses matK sequence data from 76 species of Casuarinaceae and eight outgroup taxa to examine the phylogenetic structure within the Casuarinaceae. The study demonstrates the monophyly of the four genera and examines the relationships within the family; it tests the validity of the infra-generic subdivision of Allocasuarina; it discovers geography-based infra-generic subdivisions within Gymnostoma and Casuarina; and, finally, provides a molecular framework on which to trace the evolution of xeromorphy in the Casuarinaceae.
ISSN:1055-7903
1095-9513
DOI:10.1016/S1055-7903(03)00028-9