Contribution of non-specific leaf rust resistance in Yugoslav wheat production and breeding

Abstract

The term of the non-specific resistance is based on interactions between different aviable virulences of pathogen and host genotype without significant differences in expression. The numerous genotypes which show the resistance characters were crossed (in the Institute of field and vegetable crops). The result are varieties with satisfactory level of the resistance to Puccinia recondita tritici (some of them ocupied 20% of in the Yugoslavia by wheat covered area), for eight or more years, without cases of predictable and proved overcoming in particular region. Varieties Renesansa, Prima, Lasta and according to investigated character similar new genotypes possess the relative (in comparison with before or nowadays widespread varieties Novosadska Rana 2 or Evropa 90) higher level of the partial resistance in the seedling (greenhouse) and adult stage in the field, without influence of pseudoresistance increasing factors (bad growing conditions, short green leaf area period etc). By the genealogies it is expectable that they possess known genes for the resistance effective to some virulence of the pathogen before or out of the region. Mostly, they are not originated from relative species (only wheat/rye translocation is common). Variety Lasta is most stable in expresion of nonspecific resistance characters.