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A Threshold Model for Multiyear Genebank Data Based on Different Rating Scales

Institut für Pflanzenbau und Grünland (430c), Universität Hohenheim, Fruwirthstrasse 23, D-70593 Stuttgart, Germany

View larger version (27K): [in a new window]   Fig. 1. Illustration of threshold model based on two different rating systems for mildew in barley assuming a common latent scale. Position of thresholds does not correspond exactly to parameter estimates.

View larger version (35K): [in a new window]   Fig. 2. Histogram for number of evaluation years per accession in winter barley between 1950 and 2002 (Gatersleben genebank).

View larger version (21K): [in a new window]   Fig. 3. Scatter plot of empirical Bayes estimates based on threshold model (fitted by adaptive Gaussian quadrature) vs. best linear unbiased predictions (BLUPs), treating rating scores as metric data. Some circles repsesent more than one observation.

View larger version (92K): [in a new window]   Fig. A1.