Oryza glaberrima: Difference between revisions
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'''''Oryza glaberrima''''', commonly known as '''African rice''', is a domesticated [[rice]] species. African rice is believed to have been domesticated 2,000-3,000 years ago in the inland delta of the Upper [[Niger river]], in what is now [[Mali]].<ref>Linares 2002, [http://www.pnas.org/content/99/25/16360.full African rice (''Oryza glaberrima''): History and future potential]. PNAS 99:16360-16365</ref> Its wild ancestor, which still grows wild in Africa, is ''[[Oryza barthii]]''. |
'''''Oryza glaberrima''''', commonly known as '''African rice''', is a domesticated [[rice]] species. African rice is believed to have been domesticated 2,000-3,000 years ago in the inland delta of the Upper [[Niger river]], in what is now [[Mali]].<ref>Linares 2002, [http://www.pnas.org/content/99/25/16360.full African rice (''Oryza glaberrima''): History and future potential]. PNAS 99:16360-16365</ref> Its wild ancestor, which still grows wild in Africa, is ''[[Oryza barthii]]''. |
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This species is grown in West Africa, and shows several negative characteristics with respect to the Asian rice species ''[[O. |
This species is grown in West Africa, and shows several negative characteristics with respect to the Asian rice species ''[[Oryza sativa|O. sativa]]'', like shattering, brittle grain and poor milling quality. More importantly, it consistently shows lower yields than ''O. sativa'', but African rice often shows more tolerance to fluctuations in water depth, iron toxicity, infertile soils, severe climatic conditions and human neglect, and exhibits better resistance to various pests and diseases like nematodes (''Heterodera sacchari'' and ''Meloidogyne'' sp.), African gall midge, RSNV, rice yellow mottle virus (RYMV) and the parasitic plants ''[[Striga (plant)|Striga]]''. |
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Scientist from the Africa Rice Center managed to cross-breed African rice with Asian rice varieties to produce a interspecific cultivar called [[NERICA]], which is an [[acronym]] for "New Rice for Africa". |
Scientist from the Africa Rice Center managed to cross-breed African rice with Asian rice varieties to produce a interspecific cultivar called [[NERICA]], which is an [[acronym]] for "New Rice for Africa". |
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Revision as of 12:32, 26 October 2011
| Oryza glaberrima | |
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| Species: | O. glaberrima
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| Oryza glaberrima | |
Oryza glaberrima, commonly known as African rice, is a domesticated rice species. African rice is believed to have been domesticated 2,000-3,000 years ago in the inland delta of the Upper Niger river, in what is now Mali.[1] Its wild ancestor, which still grows wild in Africa, is Oryza barthii.
This species is grown in West Africa, and shows several negative characteristics with respect to the Asian rice species O. sativa, like shattering, brittle grain and poor milling quality. More importantly, it consistently shows lower yields than O. sativa, but African rice often shows more tolerance to fluctuations in water depth, iron toxicity, infertile soils, severe climatic conditions and human neglect, and exhibits better resistance to various pests and diseases like nematodes (Heterodera sacchari and Meloidogyne sp.), African gall midge, RSNV, rice yellow mottle virus (RYMV) and the parasitic plants Striga.
Scientist from the Africa Rice Center managed to cross-breed African rice with Asian rice varieties to produce a interspecific cultivar called NERICA, which is an acronym for "New Rice for Africa".
References
- ^ Linares 2002, African rice (Oryza glaberrima): History and future potential. PNAS 99:16360-16365
- Oryza glaberrima: A source for the improvement of Oryza sativa
- Carolina Gold
- Identification of a rice stripe necrosis virus resistance locus and yield component QTLs using Oryza sativa × O. glaberrima introgression lines
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