GENETIC-CONTROL FOR RESISTANCE TO LEAF RUST IN WHEAT-AGROPYRON LINES - AGRO-139 AND AGRO-58

Leaf rust resistance lines of Triticum aestivum carry highly effective Lr genes from Agropyron intermedium (Host) Beauv. This Agro 58 and Ag ro 139 resistance segregated independently of Agropyron leaf-rust resi stance genes Lr-19, Lr-24 and Lr-9 from Ae. umbellulata. Monosomic ana lysis showed that the Lr gene in Agro 139 was incorporated into wheat chromosome 6D. C-banding analysis could not determine the C-banding pa ttern of A. intermedium in wheat-Agropyron lines Agro 58 and Agro 139. It is assumed that the transfers occurred from the euchromatin region s of the Agropyron chromosomes to the euchromatin regions of the wheat chromosomes. It is suggested that the Lr gene from Agro 139 be design ated LrAgi-1 and the Lr gene from Agro 58 designated LrAgi-2.