The 1R (1B) chromosome substitution has been identified at two introgression bread wheat stocks derived from the cross between an octoploid triticale and durum wheat. The substitution is marked by original alleles of the secaline coding loci Sec1 and Sec2. At rather low level of chromosome pairing, high winter-hardiness and frost resistance, and yield productivity both in favorable and in unfavorable years the stocks are differentiated for these traits.