Fig. 3. Means of smooth bromegrass selection cycles for each assessment of disease severity and heading index. The scale for disease severity is 0 to 2 after log transformation of the scale of 0 to 10 where 0 = no diseased leaf tissues and 10 = leaf tissues completely diseased. The scale for heading index is 0 to 2 according to the number of fully emerged panicles prior to harvest: if none, score = 0; if 1 to 5, score = 1; if more than 5, score = 2. The horizontal axes (cycle) are scaled by the expected genetic gains of recurrent selection for NDF. The least significant difference (LSD) applies to comparisons between cycles within harvests
