Details for: GSOR 28, Oryza sativa L., I12-dd


Summary Data
Taxonomy:
Oryza sativa L.
Top Name:
I12-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 28 A06FA3 SD
 
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Core Passport Data
Taxonomy:
Oryza sativa L.
Top Name:
I12-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
I12-dd
Type: Developer identifier

GSOR 28
Type: Site identifier

Mutant
Type: Other or unclassified name

Narrative
One M2 row was observed to be segregating 4 semidwarf like its parent:12 doubledwarf. The M3 generation of the 12 doubledwarf plants was grown in the 2005/2006 winter nursery where all progenies appeared uniformly doubledwarf. Parallel M3 tests of the 12 doubledwarf plants in the 2005/2006 greenhouse also gave only doubledwarfs. In the M3 greenhouse progeny test of the four semidwarfs, one gave only semidwarf plants, one gave only doubledwarf plants, and two segregated 23 semidwarf:13 double dwarf, a satisfactory fit to a single recessive gene ratio of 3 semidwarf:1 doubledwarf (0.10 < P < 0.25). In a 2006 field planting of the M4 generation of the 23 M3 semidwarfs all were lost due to poor stand, but sufficient residual seed was available for greenhouse progeny test of 18 M3 semidwarf plants. One plant proved to be a homozygous doubledwarf, i.e., it had been misclassified as a semidwarf. The remaining 17 segregated 4 homozygous semidwarf:13 heterozygous semidwarf, providing a satisfactory fit to the expected 1 homozygous semidwarf:2 heterozygous semidwarf ratio (0.25 < P < 0.50). Within the 13 heterozygous families, the pooled M4 segregation was 184 semidwarf plants:73 doubledwarf plants, a satisfactory fit to a single recessive gene ratio of 3 semidwarf:1 doubledwarf (0.25 < P < 0.50). In the 4- replicate yield test in 2006, the M4 generation of GSOR 28 headed in 72 days compared to 91 for its parent, was 85 cm tall compared to110 for its parent, and yielded 5113 kg ha-1 compared to 5777 for its parent. Yield was compromised by low seed set in GSOR 28, which averaged only 48% compared to 88% for its parent. Even lower seed set was observed, but not measured, in the M3 winter nursery. Thus this doubledwarf mutant appears to have pleiotropic effects both for early maturity (19 days) and reduced seed set. To realize full breeding value of this doubledwarf mutant it will be necessary to 'clean it up' by backcrossing to its parent or other indica lines. Otherwise, like the GSOR 27 doubledwarf, the 23% height reduction can be used to reduce lodging potential in crosses to semidwarf indica germplasm, assuming the sterility problem can be cleaned up.
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 28, also known as I12-dd, was selected at Stuttgart in 2005 as a doubledwarf mutant of indica 12, from the same gamma-ray mutagenized indica M2 population as GSOR 26