Identification of powdery‐mildew‐resistance genes in common wheat (Triticum aestivumL. em. Thell.). V. Old German cultivars and cultivars released in the former GDR

摘要

AbstractA total of 59 old wheat cultivars grown in Germany prior to 1960 were tested for mildew response using a collection of 12 differential isolates ofErysiphe graminisDC f. sp.triticiMarchal (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 designatedM1‐Ga.Cultivars ‘Bretonischer Bartweizen’ (designatedM1‐Br) and ‘Adlungs Alemannen’ (designatedM1‐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 genePm3c.Five cultivars possess gene Pm4b. two cultivars genepm5and one cultivar a combination of genesPm2andPm4b.Cultivar ‘Zentos’ was resistant to almost all isolates used. Its resistance might be conditioned by different u