Oryza longistaminata

Oryza longistaminata is a perennial species of grass from the same genus as cultivated rice (O. sativa). It is native to most of sub-Saharan Africa and Madagascar. It has been introduced into the United States, where it is often regarded as a noxious weed. Its common names are longstamen rice[2] and red rice.[3]

Oryza longistaminata
Oryza longistaminata rhizome.jpg
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Genus: Oryza
O. longistaminata
Binomial name
Oryza longistaminata

The host resistance gene, Xa21, from O. longistaminata, has been integrated into the genome of O. sativa as it confers broad resistance to rice blight disease caused by Xanthomonas oryzae pv. oryzae.[4]


O. longistaminata is native throughout Africa.[5]


  1. ^ Chevalier, Aug.; Roehrich, Olivier (1914). "Sur l'origine botanique des riz cultivés". Comptes rendus hebdomadaires des séances de l'Académie des Sciences. 159: 560 at 561.
  2. ^ "Oryza longistaminata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 25 July 2015.
  3. ^ Oryza longistaminata
  4. ^ Rice Genetics Newsletter, Vol. 20: Evaluation of durable resistance of transgenic hybrid maintainer line IR58025B for bacterial blight disease of rice
  5. ^ Chen, Erwang; Huang, Xuehui; Tian, Zhixi; Wing, Rod A.; Han, Bin (2019-04-29). "The Genomics of Oryza Species Provides Insights into Rice Domestication and Heterosis". Annual Review of Plant Biology. Annual Reviews. 70 (1): 639–665. doi:10.1146/annurev-arplant-050718-100320. ISSN 1543-5008.

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