Production of a self-inhibitor of urediospore germination in Melampsora lini (flax rust) segregates as a recessive, single gene trait

Abstract
Two strains of Melampsora lini (flax rust) were identified that differed in their ability to produce a self-inhibitor of urediospore germination. Analysis of germination self-inhibitor production amongst 63 F2 progeny derived from a sexual hybrid of these two strains revealed segregation of this trait. Segregation of urediospore germination self-inhibitor production was consistent with single-locus control with inhibitor production being recessively inherited. Key words: rust, germination, spore, inhibitor.