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Pests, diseases, and aridity have shaped the genome of Corymbia citriodora


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Healey, AL, Shepherd, M, King, GJ, Butler, JB ORCID: 0000-0003-1353-3765, Freeman, JS ORCID: 0000-0003-1166-9976, Lee, DJ, Potts, BM ORCID: 0000-0001-6244-289X, Silva-Junior, OB, Baten, A, Jenkins, J, Shu, S, Lovell, JT, Sreedasyam, A, Grimwood, J, Furtado, A, Grattapaglia, D, Barry, KW, Hundley, H, Simmons, BA, Schmutz, J, Vaillancourt, RE ORCID: 0000-0002-1159-9149 and Henry, RJ 2021 , 'Pests, diseases, and aridity have shaped the genome of Corymbia citriodora' , Communications Biology, vol. 4, no. 1 , pp. 1-13 , doi: 10.1038/s42003-021-02009-0.

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Corymbia citriodora is a member of the predominantly Southern Hemisphere Myrtaceae family, which includes the eucalypts (Eucalyptus, Corymbia and Angophora; ~800 species). Corymbia is grown for timber, pulp and paper, and essential oils in Australia, South Africa, Asia, and Brazil, maintaining a high-growth rate under marginal conditions due to drought, poor-quality soil, and biotic stresses. To dissect the genetic basis of these desirable traits, we sequenced and assembled the 408 Mb genome of Corymbia citriodora, anchored into eleven chromosomes. Comparative analysis with Eucalyptus grandis reveals high synteny, although the two diverged approximately 60 million years ago and have different genome sizes (408 vs 641 Mb), with few large intra-chromosomal rearrangements. C. citriodora shares an ancient whole-genome duplication event with E. grandis but has undergone tandem gene family expansions related to terpene biosynthesis, innate pathogen resistance, and leaf wax formation, enabling their successful adaptation to biotic/abiotic stresses and arid conditions of the Australian continent.

Item Type: Article
Authors/Creators:Healey, AL and Shepherd, M and King, GJ and Butler, JB and Freeman, JS and Lee, DJ and Potts, BM and Silva-Junior, OB and Baten, A and Jenkins, J and Shu, S and Lovell, JT and Sreedasyam, A and Grimwood, J and Furtado, A and Grattapaglia, D and Barry, KW and Hundley, H and Simmons, BA and Schmutz, J and Vaillancourt, RE and Henry, RJ
Keywords: Corymbia, eucalypt, genome assembly
Journal or Publication Title: Communications Biology
Publisher: Nature Publishing Group
ISSN: 2399-3642
DOI / ID Number: 10.1038/s42003-021-02009-0
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© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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