PJB-1969-17
GENETICS OF RUST RESISTANCE IN TETRAPLOID WHEATS. IV. GENETICS OF LEAF RUST RESISTANCE IN TWO DURUM WHEATS
M. ATAULLAH
Abstract
The inheritance of resistance in C.I.
7809 and P.I. 109593 to leaf rust of wheat, Puccinia recondita tritici was studied. It was found that resistance in C.I. 7809 to strain 135Z) was conditioned by a dominant gene Lrt\ and two recessive genes Irti and Irty. The gene Lrt\ was epistatic to both the genes Lrt2 and Lrt The resistance to
strain 68C was conditioned by gene Lrt\ and to strain 64/f by genes Lrt \ and lrt2. The physiologic resistance seemed to operate throughout the life of wheat plant. The resistance in P.I. 109593 to strains 1 35 D and 64A was found to be controlled by two recessive genes lrt4 and lrt5. It was further observed that these genes were different and independent of genes Lrt\, lrt2 and lrt3
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