IRBB21 is broadly distributed in many countries in Asia because it is a donor of the Xa21 gene. If such resistance is present, breeding lines derived from IRBB21 may also show this non-age-related broad-spectrum resis-tance.
IRBB21 is broadlydistributed in many countries in Asia because it is a donor of theXa21 gene. If such resistance is present, breeding lines derived fromIRBB21 may also show this non-age-related broad-spectrum resis-tance.