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Descriptor: Leaf & Stem rust_Lr19/Sr25/Psy-E1_wmc221 (Leaf/Stemrust:Lr19/Sr25/Psy-E1)


 
Definition:
Gene complex derived from Thinopyrum ponticum to wheat chromsome 7DS conferring resistance to leaf and stem rusts. The use of germplasm containing Sr25/Lr19 was initially limited because of linkage with another Th. ponticum derived gene causing undesirable yellow flour. Knott developed a mutant line, ‘Agatha-28’, containing Sr25/Lr19 with reduced yellow color due to a mutation in the PSY-E1 gene. It was then backcrossed into Australian wheat varieties and has been used in the CIMMYT wheat breeding program where it is present in the variety ‘Wheatear’.
Crop:
WHEAT
Category:
Molecular Marker
Status:
Data Type:
Alpha/numeric descriptor
Maximum Length:
Responsible Site:
International Maize and Wheat Improvement Center (CIMMYT,INT.)

Distinct Values for Leaf & Stem rust_Lr19/Sr25/Psy-E1_wmc221 (Leaf/Stemrust:Lr19/Sr25/Psy-E1)

ValueNumber of Accessions
heterozygous6
Lr19/Sr25 resistance16
Lr19/Sr25 susceptible551
Lr19/Sr25/Psy-E1 resistance19
Lr19/Sr25/Psy-E1 susceptible505
no amplification5


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