Journal article

Evolution of Lomandroideae: Multiple origins of polyploidy and biome occupancy in Australia

Bee F Gunn, Daniel J Murphy, Neville G Walsh, John G Conran, J Chris Pires, Terry D Macfarlane, Joanne L Birch



Asparagaceae: Lomandroideae are a species-rich and economically important subfamily in the monocot order Asparagales, with a center of diversity in Australia. Lomandroideae are ecologically diverse, occupying mesic and arid biomes in Australia and possessing an array of key traits, including sexual dimorphism, storage organs and polyploidy that are potentially adaptive for survival in seasonally arid and fire-dependent habitats. The Lomandroideae phylogeny was reconstructed using maximum likelihood and Bayesian inference criteria, based on plastome data from genome-skimming to infer relationships. A fossil-calibrated chronogram provided a temporal framework for understanding trait transition..

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Funding Acknowledgements

The authors thank the Australian Biological Resources Study, NTRGP grant (PI: Joanne L. Birch and Co-PIs: D.J. Murphy, J.C. Pires, J.G. Conran, T.D. Macfarlane), Hermon Slade Foundation grant (J.L. Birch, D.J. Murphy, J.C. Pires, J.G. Conran), and the Australasian Systematic Botanical Society, Marlies' Eichler Postdoctoral Fellowship (B. Gunn) for funding support. We thank the Royal Botanic Gardens Victoria and The University of Melbourne for organizational support and the following herbaria for providing loans and plant material from herbarium vouchers for DNA extractions: AD, BRI, CANBR, CNS, DNA, HO, NE, NSW, MEL, MELU and PERTH. Many thanks to the Dept of Biodiversity, Conservation and Attractions, Western Australia, the Queensland Government, Environmental Protection Agency, and the Dept of Environment, Land, Water and Planning, Victoria for plant collecting permits. We thank Stephen Wilcox (Walter and Eliza Hall Institute, Melbourne) for assistance with Illumina sequencing, Rachael Fowler, Todd McLay, Tanja Schuster and Mike Bayly (The University of Melbourne) for assistance with library preparation protocols, Chris Jackson (Royal Botanic Gardens Victoria) for assistance with bioinformatics and High Performance Computing, Spartan HPC at The University of Melbourne, Galaxy Australia and CIPRES Science Gateway.