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Deoxynivalenol (DON) Content and Fusarium Head Blight Resistance in Segregating Populations of Winter Rye and Winter Wheat

^a State Plant Breeding Institute (720), University of Hohenheim, D-70593 Stuttgart, Germany
^b Institute of Plant Breeding, Seed Science, and Population Genetics (350), University of Hohenheim, D-70593 Stuttgart, Germany

View larger version (20K): [in a new window]   Fig. 1. Relationship between the cumulated grain DON and 3-ADON contents analyzed by GC-MS and an immunotest for 86 and 82 winter rye samples in 1998 (a) and 2000 (b); The r value = coefficient of phenotypic correlation (**Significant at the 0.01 probability level).

View larger version (41K): [in a new window]   Fig. 2. Frequency distribution of grain DON content and head blight rating (1 to 9 scale with 1 = healthy and 9 = >95% of all spikelets per plot diseased) for A x B (a), D x I (b), and E x F (c) winter rye F3–line populations after inoculation with Fusarium culmorum averaged across four environments. Arrows mark the parental values (LSD5% = least significant difference at the 0.05 probability level).

View larger version (23K): [in a new window]   Fig. 3. Frequency distribution of grain DON content and head blight rating (1-to-9 scale with 1 = healthy and 9 = >95% of all spikelets per plot diseased) for the Arina (A) x Kontrast (K) winter wheat population with 77 F3 lines after inoculation with Fusarium culmorum averaged across four environments. Arrows mark the parental values (LSD5% = least significant difference at the 0.05 probability level).