| Gene Symbold |
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Class
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Level 1
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Reaction to Puccinia graminis Pers.
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Level 2
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Level 3
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Level 4
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Symbol
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Wild Type
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Sr2
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Allele
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Symbol comment
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Recessive allele. Adult plant response.
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Chromosomes
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3BS{499}
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Germplasms
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s:CS*6/Hope 3B{499}, v2:HD2009 Sr30{10632}, v2:Warigo Sr7b Sr17{499}, v2:Suneca Sr8a Sr17{485}, v2:Hopps Sr9d{499}, v2:Lancer Sr9d Sr17{679}, v2:Scout Sr9d Sr17{679}, v2:See also{499,1040}, ma:Xgwm389-3B - 2.7 cM - Sr2 - 1.1 cM - Xglk683-3B{0358}, ma:.....Xglk683(STS Xsun2-3B) - 0.5 cM - Xgwm533-3B{0358}, ma:These SSR loci were located within FL 0.87 - 0.75{0358}, ma:All 27 lines with Sr2 carried a 120 bp allele at Xgwm533-3B, ma:A 120 bp allele in 4 cultivars lacking Sr2 differed from the Sr2 associated allele at 4 base positions{0358}, ma:STMs for the Xgwm533-3B locus had increased specificity as markers for Sr2{10142}, ma:Tightly linked CAPS marker csSr2 based on a SNP proved superior to Xgwm533-3B as a marker for Sr2{10786}
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Comment
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Sr2 is associated with pseudo-black chaff{742,1102} and seedling chlorosis (see {149}) and occurs very frequently in commercial wheats, especially in germplasm produced and distributed by CIMMYT. Sr2 has probably remained effective since the 1920s. Lines combining Sr2 and Fhb1 are reported in {11170}; Sr2 is located about 2 cM distal to Fhb1.
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Markers
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