Divergent lineages in a semi‐arid mallee species, <i>Eucalyptus behriana</i>, correspond to a major geographic break in southeastern Australia

Fahey, Patrick S.; Fowler, Rachael M.; McLay, Todd G. B.; Udovicic, Frank; Cantrill, David J.; Bayly, Michael J.

doi:10.1002/ece3.7099

Cited by 7 publications

(8 citation statements)

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“…However, we must make sure to distinguish between an environmental condition maintaining a disjunction and a possible vicariance event. Long distance colonisation is unlikely in eucalypts given their lack of seed dispersal mechanisms [ 67 ] and has been assumed to not be a major factor in other eucalypt species with disjunct distributions [ 25 , 68 , 69 ]. This leads to the hypothesis that the populations in the eastern and western East Gippsland Lowlands must have had a more or less continuous area of occurrence at some point in the past and vicariance is responsible for the current disjunction between them.…”

Section: Discussionmentioning

confidence: 99%

“…Our data suggest that isolation of the Werribee River Catchment populations is relatively recent given their close genetic relationship to those on the Deddick River. Previous findings of Fahey et al [ 25 ] showed that the isolation of a population of another eucalypt species, E . behriana , at Long Forest in the Werribee River Catchment was one of the most recent vicariance events across the distribution of that species which otherwise occurs inland of the Great Dividing Range.…”

Section: Discussionmentioning

confidence: 99%

“…A standard CTAB protocol per McLay [ 24 ] modified per Fahey et al [ 25 ] was undertaken on 70–80 mg of dried leaf material per sample. DNA pellets were resuspended in 50 μL of 10 mM Tris HCl pH 7 buffer before extraction quality and concentration were quantified using a Nanodrop 2000 spectrophotometer (ThermoFisher) and Qubit 2.0 fluorometer (Invitrogen).…”

Section: Methodsmentioning

confidence: 99%

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A box on the river: The phylogenetics and phylogeography of Eucalyptus baueriana (Eucalyptus sect. Adnataria ser. Heterophloiae)

et al. 2022

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We present a phylogeographic study of the tree species Eucalyptus baueriana Schauer, which occurs in disjunct areas on the near coastal plains and ranges of the south-east Australian mainland. DArTseq data are used to build a phylogeny including E. baueriana and closely related taxa to test its monophyly, test the genetic distinctness of the three subspecies of E. baueriana, and investigate relationships between its disjunct populations. Additionally, we use population structure analysis to investigate the genetic distinctness of populations, and MaxEnt to investigate the environmental factors potentially influencing the species’ distribution. We show E. baueriana is monophyletic and most closely related to three other Blue Box eucalypt species: E. conica H.Deane & Maiden, E. dalveenica T.L.Collins, R.L.Andrew & J.J.Bruhl and E. magnificata L.A.S.Johnson & K.D.Hill, with some evidence for genetic introgression between these taxa. Within E. baueriana, the deepest genetic breaks do not correspond with the subspecies classification as the two geographically restricted subspecies, together with samples of the more widespread E. baueriana subsp. baueriana from west of the Gippsland lowlands, form a south-western clade with that is sister to other populations of subsp. baueriana. The oldest genetic break in the species occurs in far eastern Gippsland (Victoria), corresponding to one of the shortest geographic disjunctions in the species’ distribution. Genetic breaks in other species have been observed in this region which is broadly referred to as the southern transition zone. Both total annual rainfall and the seasonality of this rainfall are hypothesised to affect the species’ distribution; gaps in its distribution are in areas of higher rainfall that support closed forest and in regions with more winter dominated rainfall.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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A box on the river: The phylogenetics and phylogeography of Eucalyptus baueriana (Eucalyptus sect. Adnataria ser. Heterophloiae)

et al. 2022

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“…Michael J. Bayly (ORCID: 0000-0001-6836-5493), Rachael Fowler (ORCID: 0000-0002-8953-7036), School of Biosciences, University of Melbourne, Australia: Mike Bayly, Rachael Fowler and their research group use DNA data to study the evolution, diversity and classification of the Australian flora including large and iconic plant groups such as eucalypts (Schuster et al, 2018), ferns (Ohlsen et al, 2020) and bryophytes (Meagher and Bayly, 2014). Their team uses high-throughput DNA sequencing for assembly of whole chloroplast genomes (Fahey et al, 2020, nuclear ribosomal arrays (Fowler et al, 2020) and genome-wide nuclear markers (Fahey et al, 2020). To expand their research on the Australian flora, a long-term collaboration was established with Bevan Buirchell for collection of native species from a range of genera including Eremophila.…”

Section: Natural Sciencementioning

confidence: 99%

Biodiscoveries within the Australian plant genus Eremophila based on international and interdisciplinary collaboration: results and perspectives on outstanding ethical dilemmas

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Buirchell²,

Fowler

et al. 2022

The Plant Journal

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SUMMARY In a cross‐continental research initiative, including researchers working in Australia and Denmark, and based on joint external funding by a 3‐year grant from the Novo Nordisk Foundation, we have used DNA sequencing, extensive chemical profiling and molecular networking analyses across the entire Eremophila genus to provide new knowledge on the presence of natural products and their bioactivities using polypharmocological screens. Sesquiterpenoids, diterpenoids and dimers of branched‐chain fatty acids with previously unknown chemical structures were identified. The collection of plant material from the Eremophila genus was carried out according to a ‘bioprospecting agreement’ with the Government of Western Australia. We recognize that several Eremophila species hold immense cultural significance to Australia's First Peoples. In spite of our best intentions to ensure that new knowledge gained about the genus Eremophila and any potential future benefits are shared in an equitable manner, in accordance with the Nagoya Protocol, we encounter serious dilemmas and potential conflicts in making benefit sharing with Australia's First Peoples a reality.

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“…Informed by the results of Yang et al (2016) in silico tests of digestion of the E. grandis W.Hill genome, the restriction enzymes EcoR1-HF and Msp1 were chosen for genome digestion to create the ddRADseq library. The library preparation and pooling followed the protocol of Fahey et al (2021). The resulting pool was quantified on a 2200 Tape Station (Agilent) using a D1000 kit and sequencing was undertaken at the Walter and Eliza Hall Institute of Medical Research (WEHI) Genomics Hub, Melbourne, Vic., Australia, on an Illumina NextSeq.…”

Section: Dna Isolation Library Preparation and Sequencingmentioning

confidence: 99%

A phylogenetic investigation of the taxonomically problematic

et al. 2022

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To investigate the relationships among species in the taxonomically problematic Eucalyptus odorata species complex, we generated molecular data using double-digest restriction siteassociated DNA sequencing (ddRADseq) and Diversity Arrays Technology sequencing (DArTseq). These data were analysed utilising principal-component analysis (PCA), phylogenetic networks, phylogeny reconstruction and hybridisation tests. Twelve species that are variously recognised in the complex were sampled from across their ranges, along with co-occurring members of E. section Adnataria, to allow for patterns of hybridisation and gene flow to be identified. Despite the large genetic datasets generated, many relationships within the E. odorata complex were poorly resolved, and few species were monophyletic, likely owing to both biological factors including recent speciation and extensive hybridisation and introgression, and potential over-splitting of taxa. We show that multiple taxa with limited distributions are the result of reticulate evolutionary events and that typical Eucalyptus viridis R.T.Baker and the possibly con-specific E. aenea K.D.Hill are sister to the rest of the complex. The remaining species appeared to represent a discontinuous crescent-shaped cline running from the Flinders Ranges to the south-western slopes region of New South Wales, with limited support for an east-west split in this cline across the Murray River Basin. Eucalytpus viridis var. latiuscula Blakely, which is not closely related to the typical variety of this species in our data, may represent a northern extension to this cline.

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Divergent lineages in a semi‐arid mallee species, Eucalyptus behriana, correspond to a major geographic break in southeastern Australia

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 7 publications

References 57 publications

A box on the river: The phylogenetics and phylogeography of Eucalyptus baueriana (Eucalyptus sect. Adnataria ser. Heterophloiae)

A box on the river: The phylogenetics and phylogeography of Eucalyptus baueriana (Eucalyptus sect. Adnataria ser. Heterophloiae)

Biodiscoveries within the Australian plant genus Eremophila based on international and interdisciplinary collaboration: results and perspectives on outstanding ethical dilemmas

A phylogenetic investigation of the taxonomically problematic

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