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Oryza meridionalis Ng

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

Explanations

Genome designation
AA
Chromosome number
Diploid, 2n=24
Distribution
Australia and New Guinea
Key characteristics
erect plant, spikelets generally larger and more elongated than O. officinalis, 5.8-6.0mm by 2.9-3.1mm.
Habitat
Grassland beside water ? freshwater lagoons, temporary pools and swamps. Where it is sympatric with O. australiensis it usually is found at lower wetter parts of the site.
Potentially useful traits
Drought avoidance
Notes
Results of diversity analysis suggest that either this species or O. longistaminata is basal among A-genome species (Zhu and Ge, 2005).
References
Ng, N. Q., T. T. Chang, J. T. Williams, and J. G. Hawkes. 1981a. Morphological studies of Asian rice and its related wild species and the recognition of a new Australian taxon. Bio. J. Linn. Soc. 16: 303-313.
Ng,, N. Q., J. G. Hawkes, J. T. Williams, and T. T. Chang. 1981b. The recognition of a new species of rice (Oryza) from Australia. Bot. J. Linn. Soc. 82: 327-330.
Wurm, P.A. 1998. A surplus of seeds: High rates of post-dispersal seed predation in a flooded grassland in monsoonal Australia. Australian Journal of Ecology 23: 385-392
Zhu, Q and S. Ge. 2005. Phylogenetic relationships among A-genome species of the genus Oryza revealed by intron sequences of four nuclear genes. New Phytologist 167: 249-267