Resistance of some wheat genotypes to Puccinia triticina

Abstract

Thirty-four wheat genotypes were tested for resistance characteristics to Puccinia triticina at different growth stages. At seedling stage in a greenhouse, latency period, infection frequency and reaction type were determined. In the field, time of spike appearance, and infection intensity were followed. Weak (r = 0.322) to strong (r = 0.660) correlation was found between resistance characteristics at seedling stage (LPxIFxRT, in the greenhouse) and in adult plants (infection intensity and AUDPC, in the field). The values of AUDPC (area under the disease progress curve) were also strongly related to resistance characteristics of seedlings (r = 0.598). As pseudoresistant in the field (especially equal to adult plant resistance) according to other stresses reactions were considered genotypes which were the most sensitive at seedling stage (20°C) and at adult stage they did not express maximal infection intensity, particullar Evropa 90 and Suvača. Adult plant resistance as the sum of specific and pseudoresistance was observed on genotypes Tiha, Zlatka and Eva.

Keywords

• resistance
• Puccinia triticina
• wheat genotypes
• seedling stage
• adult Stage