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  • 1 Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
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Isolates of Puccinia triticina were obtained from wheat and triticale nurseries and fields in Hungary. Pathotypes were determined on 15 Thatcher wheat lines that are near-isogenic for leaf rust resistance. Thirteen pathotypes were identified from 70 Puccinia triticina isolates collected from infected wheat plants, and 2 pathotypes were identified from 12 Puccinia triticina isolates obtained from infected triticale leaves. Most pathotypes identified in Hungary were virulent to resistance genes Lr2b, Lr2c, Lr3, Lr11, Lr17, Lr21, Lr26, but pathotypes from triticale were virulent only to Lr2b, Lr2c and Lr11. Among the examined 15 Lr genes Lr2a, Lr9, Lr19, Lr23, Lr24 and Lr28 were highly effective. The most common pathotypes were 43522, 43722 and 53522 on wheat plants, among them 53522 was new in rust populations. Pathotypes 41000 and 41100 obtained from infected triticale plants were identified for the first time in the Hungarian Puccinia triticina populations. The number of pathotypes with virulence to Lr1, Lr2b and Lr21 increased from 1999 to 2004. Virulence to other Lr genes declined, because a lot of susceptible cultivars were removed from production during the past five years. In 2004, most predominant cultivars grown in Hungary were resistant or moderately resistant to leaf rust.

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