Details for: GSOR 27, Oryza sativa L., I9s-dd


Summary Data
Taxonomy:
Oryza sativa L.
Top Name:
I9s-dd
Origin:
Developed – Arkansas, United States
Received by NPGS:
08 Dec 2006
Improvement Status:
Genetic material
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Availability
FormQuantityNoteInventoryCart
Seed5 gramGSOR 27 A06FA3 SD
 
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Core Passport Data
Taxonomy:
Oryza sativa L.
Top Name:
I9s-dd
Origin:
Developed – Arkansas, United States
Received by NPGS:
08 Dec 2006
Improvement Status:
Genetic material
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Source History
Developed

Arkansas, United States

Developer(s):
Accession Names and Identifiers
I9s-dd
Type: Developer identifier

GSOR 27
Type: Site identifier

Mutant
Type: Other or unclassified name

Narrative
Seeds were mutagenized in late 2002 with 250 and 300 Gy. The M1 generation was grown in the 2002/03 Puerto Rico nursery. Reduced seed set, an indication that mutagenesis had occurred, was observed in the 300 Gy treatment, so approximately 1000 M1 panicles were taken from that dosage. Twenty seeds from each M1 panicle were planted panicle-to-row in the M2 generation in 2003, at a single seed per hill, in hills spaced 30 cm apart, in 30 cm wide rows. One M2 row segregated for 4 early plants and 7 late plants. The 4 early plants and 5 of the late plants were harvested for progeny tests in 2004. The M3 progenies of the 4 early plants were early and tall, as were progenies of 3 of the late plants. Progenies of the other 2 late plants unexpectedly segregated for a doubledwarf type which was about 20 cm shorter than the semidwarf parent. At this point it was decided that the doubledwarfs were more important than the possible early flowering plants, so emphasis was shifted to the doubledwarfs. The 2004 M3 segregation, deduced from 2005 M4 progeny tests of the 2 late plants, was 17 semidwarf plants:15 heterozygous plants:14 doubledwarf plants, a satisfactory fit with these small numbers to a 1:2:1 ratio (0.05 < P < 0.10). Within the M4 progenies of the 15 heterozygous plants, segregation was 359 semidwarf:101 doubledwarf, a satisfactory fit to a 3:1 ratio (0.10 < P < 0.25). Seeds of progenies of 4 doubledwarf plants were composited for 2006 yield tests, as well as for the genetic stock itself. In the 4-replicate yield test in 2006, GSOR 27 headed 69 days after planting, compared to 65 for its parent, was 82 cm tall compared to 102 for its parent, and yielded 7317 kg ha-1 compared to 9303 for its parent. The principal value of GSOR 27 is that its 20% reduction in plant height can be used in crossbreeding to reduce lodging potential, since lodging has been a problem in semidwarf indica germplasm grown in the US.
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
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
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)
Common names
LanguageNameAlternate namenoteseqCitation
EnglishAsian rice  1Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Englishlowland rice  1Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Englishrice  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Englishupland rice  1Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Arabicrozz  2Boulos, L. 1999-. Flora of Egypt
Frenchriz  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanReis  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Indiachavel  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Italianriso  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Japanese Rōmajiine  2Batra, L. R. 1995. Names of Japanese plants sorted by their Japanese names in Romanized Katakana and scientific nomenclature
Portuguesearroz  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanisharroz  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedishris  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Chinesedao  2Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition).
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Pedigree
Date released:
08 Dec 2006
Description:
GSOR 27, also known as I9s-dd (dd=doubledwarf), was derived from a gamma-ray mutagenized indica M2 population that was originally selected for early flowering. The mutagenized line, I9s (indica-9 sister line16-5-1), was a sib to the previously released germplasm line indica-9 (PI 634583) derived from the cross ZHE733/IR64.