Query (optional)   in Class  

GrainGenes Gene Class Report: Sphaerococcum

[ Submit comment/correction ]

Gene Class
Sphaerococcum
Reference
ReferenceKosuge K et al. (2008) Cytological and microsatellite mapping of mutant genes for spherical grain and compact spikes in durum wheat Euphytica 159:289-296.
[ Show all 7 ]
Abbreviation
s
See Also
Compactum
Compressed rachis
Spelt
APETALA2-like
Character affected
Spike morphology
Gene
s1 (Triticum)
s2 (Triticum)
S-B1 (Triticum)
S-A1 (Triticum)
S-D1 (Triticum)
Allele
s1 (Triticum)
[ Show all 11 ]
Locus
S-B1
[ Show all 6 ]
Comment
See 'Gene_Class : Spelt' for comments regarding the Q, C, and S1 genotypes of hexaploid wheats and the durum and carthlicum groups.
Sphaerococcum-like tetraploid wheats have been reported (93, 324, 908, 910), but comparisons between them, or with s2, have not been made. Whereas Schmidt & Johnson (907) reported a single recessive factor controlling the sphaerococcum character in tetraploid wheat, Joppa (442), using the same stock, found that two recessive genes were necessary to produce this phenotype.
The naturally-occurring sphaerococcum gene in chromosome 3D and various mutant alleles conferring a similar phenotype form a homoeologous series. The sphaerococcoid alleles are either recessive or incompletely dominant. All three mapped loci are closely linked to the respective centromeres (Salina, et al. 2000)
The 'a' alleles are allocated to Chinese Spring or 'normal' wheats.
Wheat Gene Catalog Reference
908
ReferenceSchmidt JW and Johnson VA (1966) Inheritance of the Sphaerococcum effect in tetraploid wheat. Wheat Information Service 22:5-6.
93
ReferenceBozzini A (1965) Sphaerococcoid, a radiation-induced mutation in Triticum durum Desf. Use of Induced Mutations in Plant Breeding. Proceedings of FAO/IEAE Meeting, Rome, Italy 375-383.
907
ReferenceSchmidt JW and Johnson VA (1963) A sphaerococcum-like tetraploid wheat. Crop Science 3:98-99.
910
ReferenceSchmidt JW et al. (1963) Inheritance of an incompletely dominant character in common wheat simulating Triticum sphaerococcum. Crop Science 3:261-264.
442
ReferenceJoppa LR WGS-95-1333-Ref#442.

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.