Description:
The T. monococcum PI 306540 (Am) x Kronos (PI 576168) F1 was crossed as bridge with hexaploid wheat variety Clear White (PI 635044). The resulting F1 was backcrossed twice to Fielder. BC2F2 plants heterozygous for SrKN but lacking Sr21, Sr60, SrTm4, Sr22b, and Sr13 were selected from the progeny of the selected BC2F1 plants. In the BC2F3 progeny, we selected plants homozygous for SrKN (Li et al. 2021). We deposited BC2F5 seeds homozygous for SrKN (tentatively Sr9e).