Fig. 1

Principal component biplot displaying the classification of a panel of Northern-European forage maize cultivars based on stem fiber and cell wall components. Cultivars were classified based on their DINAG ratings as either having “Excellent” (Green), “Good” (Blue), or “Poor” (Red) cell wall digestibility. The five proprietary hybrids carrying either the bm3 or bm1 mutations were cataloged as “Cell Wall Mutants” (Purple). Black vectors summarize the correlation between relevant feedstock compositional characters and the corresponding principal component