Abstract: To provide good resources for Ningxia wheat breeding in disease resistance, Ningchun No.4, Hedong black wheat and 331 individual plants of F₂ generation of Ningchun No.4 × Hedong black wheat were used as materials, disease resistance and molecular markers of the populations were identificated. The results showed that Ningchun No. 4 was moderate susceptible to powdery mildew, stripe rust, leaf rust, and Hedong black wheat was moderate to highly resistant to powdery mildew, moderate resistant to stripe rust and leaf rust. There were 68, 54, 52 individual plants resistant to powdery mildew, stripe rust, leaf rust in hybrids, respectively, and the rate was 20.54%, 16.32% and 15.71% in turn. In them, 50 individual plants were resistant to powdery mildew and stripe rust, 44 plants were resistant to powdery mildew and leaf rust, 32 plants were resistant to stripe rust and leaf rust, and 29 plants were resistant to powdery mildew, leaf rust and leaf rust simultaneously. There were 239 individual plants carried gene Pm16, 22.59% plants carried this gene were resistant to powdery mildew in field, 16.83% of 202 plants carried gene Yr2 were resistant to stripe rust, 17.07% of 246 plants carried gene Lr24 were resistant to leaf rust, 148 plants carried genes Pm16 and Yr2 simultaneously, 185 plants carried genes Pm16 and Lr24, 155 plants carried genes Yr2 and Lr24, 119 plants carried genes Pm16, Yr2 and Lr24 simultaneously. Ten disease resistance quantitative trait loci (QTL) were detected by six SSR markers, which involved in chromosomes 2A, 5A, 3B and 5D, their additive effects were from -0.15 to 0.08, the contribution rates to phenotype were from 2% to 4%, maximum logarithm of odds (LOD) score was 10.40, and QTL enrichment regions of disease resistance existed in 5A, 3B and 5D chromosome.

Key words: wheat (T.riticum aestivum L.), hybrid progeny, disease resistance, molecular marker, quantitative trait locus