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Identification of powdery-mildew-resistance genes in common wheat (Triticum aestivum L. em. Thell.). V. Old German cultivars and cultivars released in the former GDR |
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| Authors: | J Lutz M Katzhammer U Stephan F G Felsenstein K Oppitz F J Zeller |
| Institution: | Institut für Pflanzenbau und Pflanzenzüchtung, Technische Universitat München, D-85350 Freising-Weihenstephan, Germany;Baywa A G, Main Department, D-81925 München, Germany;Fachhochschule, F B Landwirtschaft I. D-85350 Freising-Weihenstephan, Germany |
| Abstract: | A total of 59 old wheat cultivars grown in Germany prior to 1960 were tested for mildew response using a collection of 12 differential isolates of Erysiphe graminis DC f. sp. tritici Marchal (Blumeria graminis (DC) Speer f. sp. tritici). Nineteen cultivars did not possess any major resistance gene and 25 were characterized by susceptible or intermediate responses. Fifteen cultivars revealed isolate-specific response patterns that could not be attributed to known major resistance genes or gene combinations. Many of the old German cultivars inherited a mildew-resistance gene from the Canadian cultivar ‘Garnet’ which is tentatively designated M1-Ga. Cultivars ‘Bretonischer Bartweizen’ (designated M1-Br) and ‘Adlungs Alemannen’ (designated M1-Ad) appeared to carry unknown resistance genes. Among 18 winter wheat cultivars released in the former GDR. eight showed susceptibility to all isolates used. Cv. “Borenos” carries resistance gene Pm3c. Five cultivars possess gene Pm4b. two cultivars gene pm5 and one cultivar a combination of genes Pm2 and Pm4b. Cultivar ‘Zentos’ was resistant to almost all isolates used. Its resistance might be conditioned by different unknown major resistance genes. |
| Keywords: | Triticum aestivum commercial cultivars powdery mildew resistance genes |