FFR 555W, Cardinal, and Shelby had low ITs of; to 0; to isolates MBGD, KCGD, and TLGF, which are avirulent to Lr10, and high ITs of [2.sup.+] to [3.sup.+] to all other isolates.
NC96-13141 and B93-0390 had high ITs to isolates TNRJ and TLGF, and low ITs to all other isolates.