The concept of physiological races was given by

A. Barrus (1911)

B. De Barry (1914)

C. Robinson (1971)

D. Vavilov (1926)

Answer: Option A

Solution(By Examveda Team)

The concept of physiological races was given by Barrus (1911).
Physiological races are strains of a single pathogen species differing in their ability to attack different varieties of the same host species.
The physiological race is a biotype or group of biotypes within a taxonomic group distinguished by some physiological peculiarity as host preference, chemical dependence, or pathogenicity used especially of economically important fungi, insects, or bacteria.