INHERITANCE OF RESISTANCE TO LEAF RUST IN A WHEAT-RYE RECOMBINANT 'SELECTION 212'

Abstract

Inheritance of resistance to four pathotypes (77-1, 77-3, 77-4 and 77-5) in Selection 212, a 42 chromosome wheat line developed through homoeologous recombination between wheat and rye chromosomes using monosomic 5B of variety Chinese Spring was studied. A recessive seedling resistance gene effective against each pathotype has been determined based on segregation pattern observed in F2, F3, the BCIFI and BCIF2 generations of the crosses of Selection 212 with two susceptible lines Agra Local and Chinese Spring. Joint segregation on the F3 and the BCIF2 progenies from the crosses revealed that the same resistance gene is controlling resistance to all the four pathotypes. The adult plant tests suggested the presence of an additional adult plant resistance gene which could have been derived from Chinese Spring, one of the parent of Selection 212.