Skip to main content
Skip to site map
United States Department of Agriculture
Agricultural Research Service
0
Cart
Welcome!
***THIS IS A TESTING SITE ONLY.***
Please do not place germplasm orders on this site.
GRIN-Global
Menu
USDA National Plant Germplasm System
Version:
2.3.12 [npgstest -- bhunt2312-0204]
Menu
Accessions
Descriptors
Reports
GRIN Taxonomy
Search Taxonomy
Crop Wild Relative Data
Nodulation Data
Regulations
World Economic Plants
About GRIN Taxonomy
GRIN
USDA Genetic Resource Collections
About GRIN-Global
Use of Cookies
NPGS Distribution Policy
Software Disclaimer
GRIN-U
Help
Contact Us
Your Profile
Your Profile
Your Web Request History
Your Address Book
Your Wish List
Details for: PI 431425,
Oryza sativa
L., 'IR 20'
Summary
Passport
Taxonomy
Other
Pedigree
IPR
Observation
Summary Data
Taxonomy:
Oryza sativa
L.
Cultivar:
'IR 20'
Origin:
Developed – Calabarzon (Region IV-A), Philippines
Maintained:
National Small Grains Collection
Received by NPGS:
29 Dec 1978
PI Assigned:
1978
Improvement Status:
Cultivar
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Backup Location:
National Laboratory for Genetic Resources Preservation
Inventory Volume:
186
View original Plant Inventory data in pdf format
Availability
Form
Quantity
Note
Inventory
Cart
Seed
5 gram
PI 431425 OR15AR SD
Images
(2
total. Click on image for more.)
Core Passport Data
Taxonomy:
Oryza sativa
L.
Cultivar:
'IR 20'
Origin:
Developed – Calabarzon (Region IV-A), Philippines
Maintained:
National Small Grains Collection
Received by NPGS:
29 Dec 1978
PI Assigned:
1978
Improvement Status:
Cultivar
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Source History
Developed
1969.
Laguna Province, Calabarzon (Region IV-A), Philippines
Developer(s):
International Rice Research Institute
Donated
29 December 1978.
Donor(s):
Hussain, I., Agricultural Research Council
Accession Names and Identifiers
'IR 20'
Type: Cultivar name
International Rice Research Institute
'IR20'
Type: Cultivar name
International Rice Research Institute
P 1377
Type: Collector identifier
Narrative
Oryza sativa
L.
Genus:
Oryza
Section:
Oryza
Subsection:
Oryza
Family:
Poaceae
(alt. Gramineae)
Subfamily:
Oryzoideae
Tribe:
Oryzeae
Subtribe:
Oryzinae
Nomen number:
26077
Place of publication:
Sp. pl. 1:333. 1753
Protologue link:
https://biodiversitylibrary.org/page/358352
Comment:
some seed lots of domesticated rice may contain contaminants of a noxious weed hybrid-form that are not distinguishable by seed visualization, which is responsible for the rice-growing state's noxious-weed seed regulations indicated below
Typification:
View in Linnean Typification Project
Verified:
05/11/1992
by ARS Systematic Botanists.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Autonym(s)
Oryza sativa
L. f.
sativa
Oryza sativa
L. subsp.
sativa
Oryza sativa
L. var.
sativa
Heterotypic Synonym(s)
Oryza glutinosa
Lour.
Oryza sativa
L. var.
erythroceros
Körn.
Oryza sativa
L. var.
italica
Alef.
Oryza sativa
L. var.
vulgaris
Körn.
Oryza sativa
L. var.
zeravschanica
Brches ex Katzaroff, nom. nud.
Oryza sativa
L. subsp.
indica
Kato
Oryza sativa
L. var.
affinis
Körn.
Oryza sativa
L. var.
melanacra
Körn.
Oryza sativa
L. var.
flavoacies
Kara-Murza ex Zhuk.
Oryza sativa
L. var.
suberythroceros
Kanevsk
Oryza sativa
L. subsp.
japonica
Kato
Oryza sativa
L. var.
japonica
auct.
Oryza communissima
Lour.
Oryza formosana
Masam. & Suzuki
Oryza montana
Lour.
Common names
Language
Name
Alternate name
note
seq
Citation
English
Asian rice
1
Hanelt, P., ed.
2001.
Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
English
lowland rice
1
Hanelt, P., ed.
2001.
Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
English
rice
1
Wiersema, J. H. & B. León.
1999.
World economic plants: a standard reference
CRC Press, Boca Raton, FL.
English
upland rice
1
Hanelt, P., ed.
2001.
Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Arabic
rozz
2
Boulos, L.
1999-. Flora of Egypt
French
riz
2
Rehm, S.
1994. Multilingual dictionary of agronomic plants
German
Reis
2
Rehm, S.
1994. Multilingual dictionary of agronomic plants
India
chavel
2
Rehm, S.
1994. Multilingual dictionary of agronomic plants
Italian
riso
2
Hanelt, P., ed.
2001.
Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Japanese Rōmaji
ine
2
Batra, L. R.
1995. Names of Japanese plants sorted by their Japanese names in Romanized Katakana and scientific nomenclature
Portuguese
arroz
2
Rehm, S.
1994. Multilingual dictionary of agronomic plants
Spanish
arroz
2
Rehm, S.
1994. Multilingual dictionary of agronomic plants
Swedish
ris
2
Aldén, B., S. Ryman, & M. Hjertson.
2012.
Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Chinese
dao
2
Wu Zheng-yi & P. H. Raven et al., eds.
1994-.
Flora of China (English edition).
Name
References
Annotations
Other Links
Actions
Pathogens
Vouchers
Citations
Pedigree
Date released:
1969
Description:
IR 262-24-3/TKM 6
Material Transfer Agreement
Observations
Phenotype Data
Category
Descriptor
Description
Value
Sample Size
Study
Inventory
Availability
GROWTH
Plant Height 2
Plant height measured in centimeters from the soil surface to the middle of extended panicles. Actual values. See also related descriptor Plant Height 1.
80
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
MORPHOLOGY
Plant Type - Culm Angle
Culm Angle, rice direct-seeded in rows.
1 - ERECT
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
MORPHOLOGY
Panicle Type
Panicle type classified according to their mode of branching, angle of primary branches, and spikelet density.
5 - INTERMEDIATE
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
MORPHOLOGY
Grain Type
Grain Type, classes according to USDA grading standards for brown rice.
1 - SHORT-GRAIN (AVG. LENGTH: 5.50 mm OR LESS) (AVG. LENGTH/WIDTH RATIO: UP TO 2.1)
RICE.LAB.ABERDEEN.94
PI 431425 OR SD
Not Available
MORPHOLOGY
Grain Type
Grain Type, classes according to USDA grading standards for brown rice.
6 - OTHER (NOTE UNDER REMARKS IF EXTREMELY SMALL BOLD, SLENDER, ETC.
RICE.LAB.STUTTGART.15
PI 431425 OR15AR SD
MORPHOLOGY
Hull Color
Hull color (Lemma and Palea) when terminal spikelets are ripened
2 - STRAW
RICE.LAB.ABERDEEN.94
PI 431425 OR SD
Not Available
MORPHOLOGY
Hull Cover
Pubescence of lemma or palea
4 - SHORT HAIRS THROUGHOUT
RICE.LAB.ABERDEEN.94
PI 431425 OR SD
Not Available
MORPHOLOGY
Sterile Lemma Color
Color of sterile lemma - often called outer glumes or bracts at the base of the spikelet.
1 - STRAW (YELLOW)
RICE.LAB.ABERDEEN.03
PI 431425 OR97AR SD
Not Available
MORPHOLOGY
Lodging
Estimated amount of plant lodging near maturity.
1 - 0 - 10% LODGED
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
MORPHOLOGY
Bran Color
Color of seed coat (bran/pericarp) when fully mature and dry.
2 - LIGHT BROWN
RICE.LAB.ABERDEEN.93
PI 431425 OR SD
Not Available
MORPHOLOGY
Length of Kernel
Length of kernel in millimeters for brown (dehulled) rice.
6.7
RICE.LAB.STUTTGART.15
PI 431425 OR15AR SD
MORPHOLOGY
Width of Kernel
Width of kernel in millimeters for brown (dehulled) rice.
2.8
RICE.LAB.STUTTGART.15
PI 431425 OR15AR SD
MORPHOLOGY
Kernel Length/Width Ratio
Length/Width ratio for brown (dehulled) rice
2.4
RICE.LAB.STUTTGART.15
PI 431425 OR15AR SD
PHENOLOGY
Days to Flower
Days from emergence to flowering. Actual values. See also related descriptor Days to Anthesis.
117
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
PRODUCTION
Ratooning
Regrowth from stubble
1 - NO GROWTH
RICE.AGRON.STUTTGART.91
PI 431425 OR SD
Not Available
PRODUCTION
1000 Kernel Weight-Rough
Thousand kernel weight of rough rice, based on a count of 100 or more. Expressed in grams.
25.85
RICE.LAB.STUTTGART.15
PI 431425 OR15AR SD
STRESS
Salt Tolerance
Germination and seedling growth in a saline solution. (# live seedlings/# GERMINATED) X (# live + # dead seedlings/# germ). [0 = Sensitive, 10 = Tolerant]
0.67
RICE.SALT.FAYETTEVILLE.90
PI 431425 OR SD
Not Available
STRESS
Allelopathy - Ducksalad
Exhibits allelopathic activity to ducksalad with radius of reduced weed growth greater than 10 centimeters.
N - None
RICE.DUCKSALAD.STUTTGART
PI 431425 OR93AR SD
Not Available