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GrainGenes Gene Report: Sr25 (Triticum)

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Gene
Sr25 (Triticum)  [ Marker Report ]
Gene Class
Reaction to Puccinia graminis Pers.
Locus
Sr25
Sr25^A^
Reference
ReferenceYu L et al. (2014) A consensus map for Ug99 stem rust resistance loci in wheat. Theoretical and Applied Genetics 127:1561-1581.
[ Show all 10 ]
URL
Protocol at MASwheat
Protocol for Sr25 at MASwheat
Chromosome
7A
ReferenceEizenga GC (1987) Locating the Agropyron segment in wheat - Agropyron transfer no. 12. Genome 29:365-366.
7D
ReferenceDvorak J and Knott DR (1977) Homoeologous chromatin exchange in a radiation-induced gene transfer. Canadian Journal of Genetics and Cytology 19:125-131.
ReferenceMcIntosh RA et al. (1977) Inheritance of leaf rust and stem rust resistances in wheat cultivars Agent and Agatha. Australian Journal of Agricultural Research 28:37-45.
Chromosome Arm
7AL
ReferenceEizenga GC (1987) Locating the Agropyron segment in wheat - Agropyron transfer no. 12. Genome 29:365-366.
7DL
ReferenceDvorak J and Knott DR (1977) Homoeologous chromatin exchange in a radiation-induced gene transfer. Canadian Journal of Genetics and Cytology 19:125-131.
ReferenceMcIntosh RA et al. (1977) Inheritance of leaf rust and stem rust resistances in wheat cultivars Agent and Agatha. Australian Journal of Agricultural Research 28:37-45.
Germplasm
Alien chromosome substitution lineChinese Spring 7Ag(7D)
ReferenceSears ER WGS-95-1333-Ref#916.
Hexaploid stockAGATHA
ReferenceMcIntosh RA et al. (1977) Inheritance of leaf rust and stem rust resistances in wheat cultivars Agent and Agatha. Australian Journal of Agricultural Research 28:37-45.
Near isogenic stockSears' T7A-7Ag#12
ReferenceEizenga GC (1987) Locating the Agropyron segment in wheat - Agropyron transfer no. 12. Genome 29:365-366.
Sr25/9*LMPG
ReferenceKnott DR (1990) Near-isogenic lines of wheat carrying genes for stem rust resistance. Crop Science 30:901-905.
Comment
Gene was derived from Ag. elongatum and is present in hexaploid stocks in a translocated chromosome, either T7A-7Ag or T7D-7Ag. Agatha carries T7D-7Ag.
Hexaploid stocks: Knott (489) obtained two mutants of Agatha with reduced levels of yellow pigment in the flour. One of these mutants lacked Sr25. Marais (639) reported that a gene very similar to Sr25, designated Sr25d, was present in the Inia 66 x Thinopyrum distichum derivative, Indis. Marais (639, 641) also obtained mutants with reduced yellow pigment in Indis derivatives and some of these lacked Sr25d.
Near-isogenic stocks: Sears' 7D-7Ag translocations (679, 926). Completely linked in coupling with Lr19 (679). Sears' T7D-7Ag#11 carries neither Sr25 nor Lr19 (660).
The MASWheat protocols characterize the semolina color gene Y, the leaf rust resistance gene Lr19 and stem rust resistance gene Sr25. All three genes originate from the distal region of 7EL from Lophopyrum ponticum.
Image
C-bands and GISH for Lr19/Sr25
Wheat Gene Catalog Reference
639
ReferenceMarais GF (1992) Gamma irradiation induced deletions in an alien chromosome segment of the wheat 'Indis' and their use in gene mapping. Genome 35:225-229.
[ Show all 6 ]
Info Source
ReferenceMcIntosh RA et al. (1995) Catalogue of gene symbols for wheat. Proceedings of the 8th International Wheat Genetics Symposium 1333-1500.
Data Curator
Hart, Gary E.95.08.24