Genetic basis of hypersensitive resistance to Puccinia triticina in Novi Sad created wheat varieties

Abstract

The hypersensitive resistant varieties at seedling stage in the greenhouse (around 20°C) were crossed with partially resistant one Renesansa,. According to F2 simultaneous tests with Lr Nils (Tatcher) and parents, Pesma and Selekta have the at least two same genes for the resistance to applied culture from monopustule isolate in the race type 2 in the greenhouse at the seedling stage. They are not Lr 1 or some of Lr 2 multiple allele serial. At the field conditions in the F1, the difference between the progenies from the crosses Pesma x Renesansa and Selekta x Renesansa lead to the conclusion that they are not completely same corresponding to in the greenhouse at seedling stage of the F2 progenies testing result. The inheritance of the resistance is tree hybrid (Pesma) or monohybrid (Anastasia) in the progenies from the crosses with Renesansa. Last one could be from several reasons in the case of separate observation. According to presented and previous investigation results, the Anastasia is different from Pesma and Selekta according the genetic basis of the resistance. Renesansa have the one to the applied isolate, single at the seedling stage throw the hypersensitivity not expressible gene, same as one of at least two in Anastasia. In the field conditions Anastasia crossed with the Pesma and Selecta decrease the infection severity in F1 in comparison with F1 Pesma x Selecta.