Inheritance of the wheat active resistance to Puccinia recondita tritici

摘要

Over many years, under field conditions after artificial inoculation resistance to Puccinia recondita tritici of three winter wheat genotypes KM 157/89, Kremna and Delta cv. was estimated. Complete resistant line from Bulgaria was crossed with Yugoslavian incompletely resistant cultivars. The aim of the study was to create durable resistant genotypes containing both active genes for resistance based on the investigation of parental resemblance, mode of the inheritance, type of the interaction and the number of involved genes. For durability, the identical properties of certain parental genes arc of great importance. According to the segregation in the types and assessments of the resistance after quantitative inoculation of the progenies and parents in the settling tower, it can be concluded that incomplete resistance character was controlled by accumulated interacting genes in different combinations, while complete resistance by three complementary effective genes. One of the genes from KM 157/89 (AABBCC) was also noticed in Delta (aaBBcc) i Kremna (aabbCC) cv. The genes for complete and incomplete resistance in the investigated progenies were not alike. Combination or dosage of the investigated genes for hypersensitivety did not influence theincomplete resistance.