The transfer of genes for brown rust resistance from Aegilops umbellulata Eig, to Triticum aestivum L. genome

The potential of a genome-substituted form Avrolata (AABBUU) as a genetic s ystem in genomic and chromosome manipulations for gene transfer from the wi ld species Aegilops umbellulata Eig. (UU) to cultivated wheat was studied. It was shown that plants combining resistance to leaf brown rust with high productivity may be produced from this form by classical hybridization proc edures. The resistance gene introduced to line R-12 is dominant and probabl y allelic to the Lr9 gene. By N-banding, chromosome staining technique and gliadin electrophoresis, the structural changes in chromosomes 1A, 2A, 4B, 6B, 7B, 1D, and 2D of the resistant line R-12 were revealed.