Virulence of Puccinia recondita f. sp. tritici population in Poland in 1998–2001
Anna Woźniak-Strzębicka
a.strzebicka@ihar.edu.plZakład Oceny Jakości i Metod Hodowli Zbóż, Instytut Hodowli i Aklimatyzacji Roślin w Krakowie (Poland)
Abstract
A total of 1096 isolates of Puccinia recondita f. sp. tritici was collected in Poland from 1998 to 2001. Those isolates were tested for virulence on seedlings of a set of 40 near isogenic Thatcher lines (NIL) with the resistance genes Lr. High virulence frequency (67 to 100%) to majority of the Lr genes was found. In the years of study the frequencies of virulence to the lines with Lr1, Lr2a, and Lr2b were lower than in preceding years. Also the virulence to Lr38 and LrW was rare. No virulence was found to the resistance genes Lr9, Lr19, Lr23, Lr24 and Lr25. Twenty-three different pathotypes of Puccinia recondita f. sp. tritici were identified using 15 near isogenic lines with the resistance genes: Lr1, Lr2a, Lr2b, Lr2c, Lr3, Lr9, Lr11, Lr15, Lr17, Lr19, Lr21, Lr23, Lr24, Lr26, Lr28. The most widespread pathotypes were: 02722, 02726, 03726, and 53726. The effectiveness of the Lr-genes against leaf rust was evaluated at the adult stage in the field. The Lr9, Lr13, Lr19, Lr22, Lr24, Lr25, Lr29, Lr34, Lr35 and Lr37 resistance genes were effective.
Keywords:
Puccinia recondita f. sp. tritici, resistance genes, wheat, virulenceReferences
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Authors
Anna Woźniak-Strzębickaa.strzebicka@ihar.edu.pl
Zakład Oceny Jakości i Metod Hodowli Zbóż, Instytut Hodowli i Aklimatyzacji Roślin w Krakowie Poland
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