Rice
Oryza sativa L. [Poaceae]
Ine (イネ, 稲)
Life form: perennial grass (annual for crop)
Distribution: imported to Japan in Jomon era
Habitat: paddy field
Ecotypes
- var. japonica
Many cultivars
- var. indica
- var. javanica
Oryza L.
Paddy field is one of the major sources of methane emission.
Table. The chromosome numbers and distributions of plants in Oryza (tribe Oryzeae and genus Oryza. The taxonomy follows Tateoka (1964).
| Section | Species | N | Genome | Distribution | |
|---|---|---|---|---|---|
| Oryzae | O. sativa L. | 12 | A | Asia | |
| O. rufipogon Griff. | 12 | A | |||
| O. barthii A. Chev. | 12 | Ab | Africa | ||
| O. glaberrima Steud. | 12 | Ag | Africa | ||
| O. breviligulata A. Chev. et Roehr. | 12 | Ag | Africa | ||
| O. australiensis Doin | 12 | E | Australia | ||
| O. eichingeri A. Peter | 12 | C | Africa, Asia | ||
| O. punctata Kotschy | 12, 24 | B, BC | Africa | ||
| O. officinalis Wall. | 12 | C | Asia | ||
| O. minuta Presl. | 24 | BC | Asia | ||
| O. latifolia Desv. | 24 | CD | America | ||
| O. alta Swallen | 24 | CD | America | ||
| O. grandiglumis Prod. | 24 | CD | America | ||
| Ridleyanae | O. ridleyi Hook. | 24 | ?? | Asia | |
| O. longiglumis Jansen | 24 | ?? | New Guinea | ||
| O. brachyantha A. Chev. et Roehr. | 12 | F | Africa | ||
| O. angustifolia Hubbard | 12 | ? | Africa | ||
| O. perrieri A. Camus | 12 | ? | Madagascar | ||
| O. tisseranti A. Chev. | 12 | ? | Africa | ||
| Granulatae | O. meyeriana Baill. | 12 | ? | Asia | |
| Schlechterianae | O. schlechteri Pilger | ? | ? | New Guinea |
Oryza sativa in Hokkaido
A paddy field near Kita-Yuzawa Spar on August 25 2010. Hokkaido is the northern limit of rice production in Japan. Paddy field is one of the major sources of methane production.