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Fig. 3. Surface plots of predicted hybrid-mean repeatability for oil yield in the central (A) and northern (B) subregions as the number of locations and years of testing in multienvironment trials are changed (assumes three replicates for each location-year combination), based on the within-subregion components of variance given in Table 3. Black triangles indicate repeatability estimates for 1-yr or one-location testing combinations assuming one replicate per trial.
