Phylogenetic analysis reveals multiple introductions of Cynodon species in Australia

M Jewell; Celine H Frere; K Harris-Shultz; W F Anderson; I D Godwin; C J Lambrides

doi:10.1016/j.ympev.2012.06.026

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Phylogenetic analysis reveals multiple introductions of Cynodon species in Australia

Journal article

Peer reviewed

Phylogenetic analysis reveals multiple introductions of Cynodon species in Australia

M Jewell, Celine H Frere, K Harris-Shultz, W F Anderson, I D Godwin and C J Lambrides

Molecular Phylogenetics and Evolution, Vol.65(2), pp.390-396

2012

DOI: https://doi.org/10.1016/j.ympev.2012.06.026

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Abstract

cpDNA

speciation

phylogenetics

bermudagrass

The distinction between native and introduced flora within isolated land masses presents unique challenges. The geological and colonisation history of Australia, the world's largest island, makes it a valuable system for studying species endemism, introduction, and phylogeny. Using this strategy we investigated Australian cosmopolitan grasses belonging to the genus Cynodon. While it is believed that seven species of Cynodon are present in Australia, no genetic analyses have investigated the origin, diversity and phylogenetic history of Cynodon within Australia. To address this gap, 147 samples (92 from across Australia and 55 representing global distribution) were sequenced for a total of 3336. bp of chloroplast DNA spanning six genes. Data showed the presence of at least six putatively introduced Cynodon species (C. transvaalensis, C. incompletus, C. hirsutus, C. radiatus, C. plectostachyus and C. dactylon) in Australia and suggested multiple recent introductions. C. plectostachyus, a species often confused with C. nlemfuensis, was not previously considered to be present in Australia. Most significantly, we identified two common haplotypes that formed a monophyletic clade diverging from previously identified Cynodon species. We hypothesise that these two haplotypes may represent a previously undescribed species of Cynodon. We provide further evidence that two Australian native species, Brachyachne tenella and B. convergens belong in the genus Cynodon and, therefore, argue for the taxonomic revision of the genus Cynodon

Details

Title: Phylogenetic analysis reveals multiple introductions of Cynodon species in Australia
Authors: M Jewell (Author) - University of Queensland
Celine H Frere (Author) - University of Queensland
K Harris-Shultz (Author) - USDA-ARS Crop Genetics and Breeding Research, United States
W F Anderson (Author) - USDA-ARS Crop Genetics and Breeding Research, United States
I D Godwin (Author) - University of Queensland
C J Lambrides (Author) - University of Queensland
Publication details: Molecular Phylogenetics and Evolution, Vol.65(2), pp.390-396
Publisher: Academic Press
Date published: 2012
DOI: 10.1016/j.ympev.2012.06.026
ISSN: 1055-7903
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99448975602621
Output Type: Journal article

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Web Of Science research areas: Biochemistry & Molecular Biology; Evolutionary Biology; Genetics & Heredity

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