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Virulence of Puccinia recondita on wheat in southern Bulgaria during 1979-81

, : Virulence of Puccinia recondita on wheat in southern Bulgaria during 1979-81. Rasteniev"dni Nauki 20(4): 113-119

Twelve physiological races were identified in southern Bulgaria during this period, with races 77 and 167 being the most widespread. Subraces were found for races 77 and 21. Genetic formulae are presented for virulence genes in 10 of the races. Most single-spore isolates identified as of the same race had different virulence in relation to Lr resistance genes and their genetic formulae were not the same.

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Related references

Gospodinova, E., 1982: Genetic characterization of the pathogen of wheat brown rust, Puccinia recondita Rob. ex Desm. f.sp. tritici Erikss., in Bulgaria in 1979-80. On analysing 381 single spore isolates 25 formulae of virulence were found in 1979 and 18 in 1980. Genes Lr and Lr19 were completely effective against the pathogen and are recommended for use in breeding.

Rysz-Bialota, M., 1982: Physiological variability and virulence of wheat leave rust (Puccinia recondita f.sp. tritici) in Poland in 1977-1979. Hodowla roslin aklimatyzacja i nasiennictwo = Plant breeding acclimatization and seed production6(2): 125-134

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