Table 1.
Set of 12 common bean differential cultivars and binary code used to designate races of Pseudocercospora griseola. Each race is assigned two numbers based on the summation of the binary numbers of the susceptible Andean and Mesoamerican cultivars, respectively. The example in the table shows how a Mesoamerican isolate of P. griseola was characterized as race 25-39.
| Differential cultivars | Seed size | Common bean race | Resistance gene/ linkage group | Binary value | Reaction and binary value of susceptible cultivars |
|---|---|---|---|---|---|
| Andean cultivars† | |||||
| Don Timoteo | Large | Chile | Unknown | 1 | Susceptible: 1 |
| G11796 | Large | Peru | Unknown | 2 | Resistant |
| Bolon Bayo | Large | Peru | Unknown | 4 | Resistant |
| Montcalm | Large | Nueva Granada | Unknown | 8 | Susceptible: 8 |
| Amendoim | Large | Nueva Granada | Unknown | 16 | Susceptible: 16 |
| G5686 | Large | Nueva Granada | Phg-4/Pv04; Phg-5/Pv10 | 32 | Resistant |
| Mesoamerican cultivars‡ | |||||
| PAN 72 | Small | Mesoamerica | Unknown | 1 | Susceptible: 1 |
| G2858 | Medium | Durango | Unknown | 2 | Susceptible: 2 |
| Flor De Mayo | Small | Jalisco | Unknown | 4 | Susceptible: 4 |
| Mexico 54 | Medium | Jalisco | Phg-2/Pv08 | 8 | Resistant |
| BAT 332 | Small | Mesoamerica | Phg-22/Pv08 | 16 | Resistant |
| Cornell 49-242 | Small | Mesoamerica | 32 | Susceptible: 32 | |
†
Andean binary value (1 + 8 + 16) = 25.
‡
Mesoamerican binary value (1 + 2 + 4 + 32) = 39 (race 25–39).