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Oryza rufipogon 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Cyperales Gramineae

Scientific Name: Oryza rufipogon
Species Authority: Griff.
Synonym(s):
Oryza fatua J. Koenig ex Trin., nom. nud.
Oryza perennis
Oryza rufipogon
Oryza sativa L. var. fatua Prain
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-05-21
Assessor(s): Watve, A.
Reviewer(s): Juffe Bignoli, D., Narasimhan, D., Ravikumar, K., Rao, M.L.V. & Kumar, V.S.
Contributor(s): Molur, S.
Justification:
Oryza rufipogon is the wild species from which the cultivated rice, Oryza sativa, has been domesticated. It is wide spread in most of the world, being invasive in parts of America. It is considered a weed in rice fields, as it easily crosses with the cultivated rice, reducing its market value. No serious threats have been reported for the species and hence it is included in the category Least Concern. It is important for the germplasm which has many resistant genes, and hence is collected and conserved in-situ and ex-situ in China.

Geographic Range [top]

Range Description:Oryza rufipogon is a widely distributed tropical plant.It has been recorded in Asia (Afghanistan, Bangladesh, Cambodia, China, India, Indonesia , Iran, Iraq, Korea, DPR, Republic of Korea, Laos , Malaysia, Peninsular Malaysia, Myanmar, Nepal, Pakistan, Philippines , Sri Lanka, Thailand, Vietnam), Africa (Egypt Senegal Swaziland Tanzania), North America (USA), Central America, South America (Brazil, Colombia, Ecuador, Guyana, Peru, Venezuela, Oceania), Australia (Australia Queensland Papua New Guinea).
Countries occurrence:
Native:
Afghanistan; Australia; Bangladesh; Brazil; Cambodia; China (Guangdong, Guangxi, Hunan, Jiangxi, Yunnan); Colombia; Ecuador; Egypt; Guyana; Hong Kong; India (Andhra Pradesh, Assam, Bihar, Goa, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Orissa, Tamil Nadu, Uttar Pradesh, West Bengal); Indonesia (Jawa, Kalimantan, Papua, Sulawesi); Iran, Islamic Republic of; Iraq; Korea, Democratic People's Republic of; Korea, Republic of; Lao People's Democratic Republic; Malaysia; Myanmar; Nepal; Pakistan; Papua New Guinea; Peru; Philippines; Senegal; Sri Lanka; Swaziland; Taiwan, Province of China; Tanzania, United Republic of; Thailand; United States; Venezuela, Bolivarian Republic of; Viet Nam
Additional data:
Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):1000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The species is widely distributed and has invasive tendencies.
Current Population Trend:Increasing
Additional data:
Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:No
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Oryza rufipogon grows in shallow water, irrigated fields, pools, ditches and sites with stagnant or slow, running water. It occurs at altitudes from 0 to 1000 m and is suited to sites that support populations of cultivated rice.
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:No

Use and Trade [top]

Use and Trade: It is a reservoir of many resistant genes necessary for the cultivated rice. It is from this species that the cultivated rice Oryza sativa was domesticated. Hence, it is used for rice breeding and research.

Threats [top]

Major Threat(s): There are no major threats to the population of this species. It is being actively controlled in many areas as it competes with the cultivated rice.

Conservation Actions [top]

Conservation Actions: It is considered important to conserve germplasm of this species as ancestor of cultivated rice. In China, a program on in-situ conservation has been started.

Citation: Watve, A. 2011. Oryza rufipogon. The IUCN Red List of Threatened Species 2011: e.T176902A7327728. . Downloaded on 22 June 2017.
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