Descriptor: Stem Rust Seedling RTQQ (STEMRUSTSE_RTQQ)



 
Definition:
Seedling infection types produced by Puccinia graminis f.sp. tritici - RTQQ.
Crop:
WHEAT
Category:
Disease descriptors
Status:
Crop Germplasm Committee approved
Data Type:
Alpha/numeric descriptor
Maximum Length:
2
Comment:
[+, ++, -, =] indicate variation within an infection; c, b, n indicate chlorosis, browning,
Responsible Site:
National Small Grains Collection (NSGC)

Distribution of Values for Stem Rust Seedling RTQQ (STEMRUSTSE_RTQQ)

CodeDefinitionNumber of Accessions
;MOSTLY IMMUNE, NO UREDIA, BUT NUMEROUS HYPERSENSITIVE FLECKS PRESENT991
0IMMUNE; NO UREDIA OR OTHER INDICATIONS OF INFECTION177
0;NEARLY IMMUNE; NO UREDIA BUT A FEW HYPERSENSITIVE FLECKS PRESENT1135
1VERY RESISTANT; UREDIA MINUTE, SURROUNDED BY DISTINCT NECROTIC AREAS313
2MODERATELY RESISTANT; UREDIA SMALL TO MEDIUM, USUALLY GREEN ISLANDS SURROUNDED BY A DECIDEDLY CHLOROTIC/NECROTIC BORDER1609
3MODERATELY SUSCEPTIBLE; UREDIA MEDIUM SIZE COALESCENCE INFREQUENT, NO NECROSIS, BUT CHLOROTIC AREAS MAYBE PRESENT2
SVERY SUSCEPTIBLE; UREDIA LARGE AND OFTEN COALESCING, NO NECROSIS BUT CHLOROSIS MAY BE PRESENT4712
XHETEROGENEOUS; UREDIA VARIABLE, SOMETIMES INCLUDING ALL INFECTION TYPES AND INTERGRADATIONS ON THE SAME LEAF33