INHERITANCE OF OAT STEM RUST RESISTANCE IN A TUNISIAN STRAIN OF AVENA STERILIS

Abstract

The strain CW490-2 of Avena sterilis L. possesses a single recessive gene, pg-13, for oat stem rust resistance. It confers resistance to a wide range of stem rust races. Gene pg-13 is not linked to Pg-1 or pg-9 but appears tightly-linked or allelic with Pg-4. A high level of sterility in the progeny of crosses between Avena sativa varieties and CW490-2 is apparently due to four interchange differences.