Q179
Gene for Gene hypothesis was 1st observed in
A.
Linseed rust
AnswerB.
Mango rust
C.
Wheat black rust
D.
Wheat brown rust
Answer: Option A
Solution
Answer: Option A
Solution:
Gene for Gene hypothesis was 1st observed in Linseed rust.The gene-for-gene relationship was discovered by Harold Henry Flor who was working with rust (Melampsora lini) of flax (Linum usitatissimum).
The inheritance of both resistance in the host and parasite's ability to cause disease is controlled by pairs of matching genes. One is a plant gene called the resistance (R) gene. Gene-for-gene relationships are a widespread and very important aspect of plant disease resistance.