Department of Agricultural Botany, The University of Sydney, Sydney, N.S.W., Australia
*Present address: CIMMYT, Londres 40, Mexico 6, D. F., Mexico.
The inheritance of adult plant resistance to leaf rust was investigated in the variety W 3302, which was found to carry a recessive gene. This gene requires at least two modifiers to produce the immune reaction characteristic of the parental variety. This gene gives resistance to a wide range of races of leaf rust.
