학술논문
Pests, diseases, and aridity have shaped the genome of Corymbia citriodora.
Document Type
Article
Author
Healey, Adam L.; Shepherd, Mervyn; King, Graham J.; Butler, Jakob B.; Freeman, Jules S.; Lee, David J.; Potts, Brad M.; Silva-Junior, Orzenil B.; Baten, Abdul; Jenkins, Jerry; Shu, Shengqiang; Lovell, John T.; Sreedasyam, Avinash; Grimwood, Jane; Furtado, Agnelo; Grattapaglia, Dario; Barry, Kerrie W.; Hundley, Hope; Simmons, Blake A.; Schmutz, Jeremy
Source
Subject
*PESTS
*MYRTACEAE
*PLANT diseases
*ESSENTIAL oils
*PLANT genomes
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Language
ISSN
2399-3642
Abstract
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. Healey and colleagues presented a reference sequence assembly of Corymbia citriodora (spotted gum), a tree which is crucial for timber, pulp, and paper, as well as carbon sequestration and essential oil production. [ABSTRACT FROM AUTHOR]