Genetic Assessment of Leaf Rust Resistance in Some Wheat Varieties

Abstract

The experiments of this study were carried out through four growing seasons i.e., 2015/16 to 2018/19 at the farm of the faculty of Agriculture, Shibin El-Kom, Menoufia University.Using10 Egyptian wheat varieties,16 wheat promising lines from (CIMMYT) and 20 adult plant leaf rust resistance genes (Lr). lines Lr were used as (male) for crosses with the wheat cultivars (female) to obtain the F1 grains to produce F2 grains and perform genetic analysis. Recording final rust severity (FRS), rate of disease increase (r-value) and the area under disease progress curve (AUDPC) from varieties and lines to responses leaf rust resistance. While STS marker specific for Lr19 and Lr28 genes were performed on the ten wheat varieties and the sixteen promising lines. The responses of rust severity and infection type of the 20 Lr strains were divided into three groups; I resistant genes i.e.,