Yellow rust is (Puccinia striiformis Westend. f. sp. tritici) is among the supreme diseases causing serious losses in wheat production. The chemical fungicides are commonly used in this disease-fighting. However, chemical control is not economical and also causes environmental pollution. Therefore, the use of resistant wheat varieties in production has critical importance. The resistance against yellow rust disease is expressed with Yr genes. In the breeding studies, knowing which parents include resistance genes provides a great advantage in the development of new resistant varieties. This study aims to determine the efficiency of markers used to detect resistance genes against yellow rust disease. The efficiency of molecular markers (Xgwm582, RgaYr10a, Xgwm413, Xgwm11, Wmc44, Barc101, Cfa2149, Sun104, Xgwm273) that are identified for nine genes (Yr9, Yr10, Yr15, Yr26, Yr29, Yr36, Yr48, Yr51, and YrCH52) providing resistance against yellow rust disease was investigated using PCR method. Twenty bread wheat varieties were used as material. Resistance gene profiles determined using PCR-based molecular markers and data obtained from registration information and field resistance data in the literature were analysed comparatively. As a result of the analysis, the efficiency/productivity of the markers defined for different resistance genes in detecting the resistance gene profile of wheat varieties was determined. Moreover, resistance gene profiles of varieties that are known resistance states in the field and sensitive varieties were compared. Genes that are prominent in providing resistance and detected with markers were determined and the efficiency of these genes was evaluated according to their homozygous/heterozygous states. It was concluded that the efficacy of markers such as RgaYr10a, Xgwm413, Barc101, and Cfa2149, which gave positive results in all wheat varieties, was low.

This study was conducted to determine the inheritance of common bunt resistance in twelve bread wheat varieties and their half-diallel hybrids in Turkey. The disease ratings were performed on the F2 generations of the hybrids in field conditions. The obtained data were analysed by the χ2 test to determine the effective gene numbers and inheritance type in the disease resistance. In addition, the data were evaluated according to the Jinks-Hayman diallel analyses. In conclusion, it was found that of the twelve wheat parents, four contained three resistance genes and four of them contain two resistance genes. The dominant genes were prominent in the population and complete dominance was present. Therefore, the selection for disease resistance should be delayed until the following generations.