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Combined inoculation of wheat pathogens Z ymoseptoria tritici and F usarium culmorum as a tool for increasing selection intensity in resistance breeding
Author(s) -
Miedaner Thomas,
Lieberherr Bärbel,
Koch Silvia,
Scholz Meike,
Ebmeyer Erhard
Publication year - 2014
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12191
Subject(s) - inoculation , biology , cultivar , agronomy , crop , plant disease resistance , poaceae , horticulture , veterinary medicine , genetics , gene , medicine
Resistances to S eptoria tritici blotch ( STB ) and F usarium head blight ( FHB ) are important goals in E uropean wheat breeding. We tested 25 winter wheat cultivars differing in their resistance to both diseases by inoculating Z ymoseptoria tritici or F usarium culmorum either separately on different plots or combined on the same plot. Experiments were carried out across three location × year combinations in four variants: non‐inoculated, STB inoculated, FHB inoculated and STB + FHB inoculated at the respective optimal plant stages. On the individually inoculated plots, mean STB severities ranged from 12% to 70% and mean FHB severities from 0.3% to 67% across wheat cultivars. The resistances to STB and FHB were not correlated. Mean disease severities of the respective inoculation variants, STB vs. STB + FHB and FHB vs. STB + FHB , were not significantly different (P > 0.1), and correlations between both inoculation variants were extremely high ( r = 0.98) for STB . In conclusion, breeding populations have to be selected for both resistances separately, but phenotyping can be performed on the same plot without ranking differences of the respective resistance.