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Oryza australiensis Domin

  • Distribution
    Distribution
  • Spikelet
    Spikelet
  • Spikelet
    Spikelet
  • Inflorescence
    Inflorescence
  • Habitat
    Habitat
  • Habitat
    Habitat
  • Habitat
    Habitat
  • Habitat
    Habitat

Explanations

Genome designation
EE
Chromosome number
Diploid, 2n=12
Distribution
Tropical Australia
Key characteristics
Tall (>2m), erect herb with grey-green leaves, pear-shaped spikelet with flexuous awn and scabrous panicle axis. Perennial (rhizomatous) and annual (non-rhizaomatous) reported.
Habitat
Found in open habitats beside lagoons, streams or lakes. When sympatric with A-genome Oryza usually at higher elevations at the site. Grows in red loam and clay soils.
Potentially useful traits
Pest resistance, drought tolerance.
Notes
This species has the largest diploid genome size among Oryza species. Intra specific variation is little studied.
References
Piegu, B., R. Guyot, N. Picault, A. Roulin, A. Saniyal, H. Kim, K. Collura, D.S. Brar, S. Jackson, R.A. Wing, O. Panaud. 2006. Doubling genome size without polyploidization: Dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice. Genome Research 16:1262-1269
Multani, D. S., K. K. Jena, D. S. Brar, B. C. de los Reyes, E. R. Angeles, and G. S. Khush. 1994. Development of monosomic alien addition lines and introgression of genes from O. australiensis Domin. to cultivated rice, O. sativa L. Theor. Appl. Genet. 88:102-109.
Noma, K., R. Nakajima, H. Ohtsubo, and E. Ohtsubo. 1997. RIRE1, a retrotransposon from wild rice, Oryza australiensis. Genes Genet. Syst. 72:131-140.