| Codes used in wheat leaf rust survey databases |
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State - state from which collection was made (2 letter postal abbreviation)
County - county from which collection was made
Race - race codes are assigned according to the following:
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Code for North American differential hosts for Puccinia triticina in ordered sets of four. |
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Infection type produced on near isogenic Lr Lines** |
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Host set 1 |
1 |
2a |
2c |
3 |
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Host set 2 |
9 |
16 |
24 |
26 |
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Host set 3 |
3ka |
11 |
17 |
30 |
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Host set 4 |
B |
10 |
14a |
18 |
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Race code* |
Host set 5 |
21 |
28 |
41 |
42 |
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B |
L |
L |
L |
L |
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C |
L |
L |
L |
H |
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D |
L |
L |
H |
L |
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F |
L |
L |
H |
H |
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G |
L |
H |
L |
L |
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H |
L |
H |
L |
H |
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J |
L |
H |
H |
L |
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K |
L |
H |
H |
H |
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L |
H |
L |
L |
L |
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M |
H |
L |
L |
H |
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N |
H |
L |
H |
L |
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P |
H |
L |
H |
H |
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Q |
H |
H |
L |
L |
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R |
H |
H |
L |
H |
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S |
H |
H |
H |
L |
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T |
H |
H |
H |
H |
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* Prt code consists of the designation for set 1 followed by that for set 2, etc. For example, race MGB: set 1 (M) - virulent to Lr1,3; set 2 (G) - virulent to Lr16; set 3 (B) - avirulent (see Phytopathology 79:525-529). ** L = low infection type (avirulent pathogen); H = high infection type (virulent pathogen). |
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Cultivar/line - cultivar or line name, otherwise:
Comm - if collection is from a commercial field
Nur - if collection is from a nursery
Wd - if collection is from a weed
Comp - if collection is a composite from an area
Unknown - if unknown
Host Code - coded as detailed below:
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Winter Wheat |
Club Wheat |
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HRW |
hard red winter wheat |
SRWC |
soft red winter club winter |
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SRW |
soft red winter wheat |
SWWC |
soft white winter club wheat |
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HWW |
hard white winter wheat |
SWSC |
soft white spring club wheat |
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SWW |
soft white winter wheat |
CW |
unknown club wheat type |
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WW |
unknown winter wheat type |
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Durum Wheat |
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Spring Wheat |
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SD |
spring durum wheat |
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HRS |
hard red spring wheat |
WD |
winter durum wheat |
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SRS |
soft red spring wheat |
D |
unknown durumwheat type |
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HWS |
hard white spring wheat |
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SWS |
soft white winter wheat |
Other Wheats |
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SW |
unknown spring wheat type |
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W |
unknown wheat type |
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TC |
Triticum (Aegilops) cylindricum |
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Collector - initials of collecting individual
Collection Date - date collection made, in the format: month (2 digits) day (2 digits)
For example: January 6 = 0106, November 8 = 1108
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Severity - |
Code: |
TR |
LT |
MD |
HV |
VB |
NA |
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Observation: |
<1% |
1-20% |
20-80% |
>80% |
varies within field |
not available |
Prevalence - same coding as used for severity
Source - source of collection:
Field = commercial field
Nursery = nursery
Non Cultivated = area not under cultivation
Unknown = source unknown
Coll - collection number (accession number assigned to collections as they arrive at the CDL)
Isol - isolate number (up to 3 isolates taken from each collection)
