THE INHERITANCE OF RESISTANCE TO STEM AND CROWN RUST IN KYTO OATS

Abstract
The oat variety Kyto possesses a recessive gene, designated pg-12, which confers seedling resistance to all nine races of oat stem rust tested. This gene is inherited independently of the Pg-2, Pg-4 and pg-9 loci for seedling stem rust resistance. Kyto also possesses a dominant gene, Pc-44, for resistance to crown rust of oats. Gene Pc-44 is inherited independently of the Pg-2, Pg-4 and pg-12 loci but is associated with the pg-9 locus. Resistance conferred by genes pg-12 and Pc-44 is not expressed at constant temperatures of 25°C and above.