Fig. 1. Frequency distribution for ruminal dry-matter digestibility (DMD) measured in the USDA spring barley core collection (n = 1480) grown in 1995 (black bars), the 73 accessions selected for low (n = 37) and high (n = 36) DMD and grown in 1996 and 1997 (light bars = mean values), and the eight check cultivars grown in 1996 and 1997 (white bars = mean values).

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