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Genomic patterns of species diversity and divergence in Eucalyptus


Hudson, CJ and Freeman, JS and Myburg, AA and Potts, BM and Vaillancourt, RE, Genomic patterns of species diversity and divergence in Eucalyptus, New Phytologist, 206, (4) pp. 1378-1390. ISSN 0028-646X (2015) [Refereed Article]

Copyright Statement

Copyright 2015 University of Tasmania

DOI: doi:10.1111/nph.13316


  • We examined genome-wide patterns of DNA sequence diversity and divergence among six species of the important tree genus Eucalyptus and investigated their relationship with genomic architecture.
  • Using c. 90 range-wide individuals of each Eucalyptus species (E. grandis, E. urophylla, E. globulus, E. nitens, E. dunnii and E. camaldulensis), genetic diversity and divergence were estimated from 2840 polymorphic diversity arrays technology markers covering the 11 chromosomes. Species differentiating markers (SDMs) identified in each of 15 pairwise species comparisons, along with species diversity (HHW) and divergence (FST), were projected onto the E. grandis reference genome.
  • Across all species comparisons, SDMs totalled 1.1–5.3% of markers and were widely distributed throughout the genome. Marker divergence (FST and SDMs) and diversity differed among and within chromosomes. Patterns of diversity and divergence were broadly conserved across species and significantly associated with genomic features, including the proximity of markers to genes, the relative number of clusters of tandem duplications, and gene density within or among chromosomes.
  • These results suggest that genomic architecture influences patterns of species diversity and divergence in the genus. This influence is evident across the six species, encompassing diverse phylogenetic lineages, geography and ecology.
  • Item Details

    Item Type:Refereed Article
    Keywords:eucalypt, evolution, genetic diversity, speciation
    Research Division:Biological Sciences
    Research Group:Genetics
    Research Field:Genetics not elsewhere classified
    Objective Division:Plant Production and Plant Primary Products
    Objective Group:Forestry
    Objective Field:Hardwood plantations
    UTAS Author:Hudson, CJ (Dr Corey Hudson)
    UTAS Author:Freeman, JS (Dr Jules Freeman)
    UTAS Author:Potts, BM (Professor Brad Potts)
    UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
    ID Code:103874
    Year Published:2015
    Funding Support:Australian Research Council (DP0770506)
    Web of Science® Times Cited:16
    Deposited By:Plant Science
    Deposited On:2015-10-28
    Last Modified:2017-11-06

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