Glacial refugia and reticulate evolution: the case of the Tasmanian eucalypts
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In this paper, the authors summarized recent genetic evidence for migration and introgressive hybridization in Tasmanian Eucalyptus and concluded that changes in distribution of interfertile species during the Quaternary have promoted reticulate evolution in Eucaliptus.Abstract:
Tasmania is a natural laboratory for investigating the evolutionary processes of the Quaternary. It is a large island lying 40-44 degrees S, which was repeatedly glaciated and linked to southeastern continental Australia during the Quaternary. Climate change promoted both the isolation of species in glacial refugia, and an exchange between Tasmanian and mainland floras. Eucalyptus is a complex and diverse genus, which has increased in abundance in Australia over the past 100 kyr, probably in response to higher fire frequency. Morphological evidence suggests that gene flow may have occurred between many eucalypt species after changes in their distribution during the Quaternary. This paper summarizes recent genetic evidence for migration and introgressive hybridization in Tasmanian Eucalyptus. Maternally inherited chloroplast DNA reveals a long-term persistence of eucalypts in southeastern Tasmanian refugia, coupled with introgressive hybridization involving many species. Detailed analysis of the widespread species Eucalyptus globulus suggests that migration from mainland Australia was followed by introgression involving a rare Tasmanian endemic. The data support the hypothesis that changes in distribution of interfertile species during the Quaternary have promoted reticulate evolution in Eucalyptus.read more
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Decline of a biome: Evolution, contraction, fragmentation, extinction and invasion of the Australian mesic zone biota
Margaret Byrne,Dorothy A. Steane,Leo Joseph,David K. Yeates,Gregory J. Jordan,Darren M. Crayn,Ken Aplin,David J. Cantrill,Lynette Gai Cook,Michael D. Crisp,J. Scott Keogh,Jane Melville,Craig Moritz,Nicholas Porch,J. M. Kale Sniderman,Paul Sunnucks,Peter H. Weston +16 more
TL;DR: The aims are to review and refine key hypotheses derived from palaeoclimatic data and the fossil record that are critical to understanding the evolution of the Australian mesic biota and examine predictions arising from these hypotheses using available molecular phylogenetic and phylogeographical data.
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Evidence for multiple refugia at different time scales during Pleistocene climatic oscillations in southern Australia inferred from phylogeography
TL;DR: In this paper, the authors use the spatial distribution of genealogical lineages to deduce the influence of historical processes on the evolution of species, and can be informative in regard to location of refugia during extreme climatic conditions.
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Progress in Myrtaceae genetics and genomics: Eucalyptus as the pivotal genus
Dario Grattapaglia,Dario Grattapaglia,René E. Vaillancourt,Merv Shepherd,Bala R. Thumma,William J. Foley,Carsten Külheim,Brad M. Potts,Alexander Andrew Myburg +8 more
TL;DR: The status of genomics and genetics research in the Myrtaceae, a large family of dicotyledonous woody plants, is reviewed with Eucalyptus as the focal genus, to find candidate gene-based association genetics have successfully found marker–trait associations for wood and fiber traits.
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The capacity of refugia for conservation planning under climate change
Gunnar Keppel,Karel Mokany,Grant Wardell-Johnson,Ben L. Phillips,Ben L. Phillips,Justin A. Welbergen,Justin A. Welbergen,April E. Reside +7 more
TL;DR: In this article, a flexible framework for prioritizing future refugia, based on their capacity, is proposed to identify and quantify the potential for species persistence in large-scale, long-term climatic change.
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Poleward bound: biological impacts of Southern Hemisphere glaciation
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