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Clonal Selection for Lignin and Etherified Ferulates in Three Perennial Grasses

^a USDA-ARS, U.S. Dairy Forage Res. Center, 1925 Linden Dr. West, Madison, WI 53706-1108
^b USDA-ARS, Plant Science Res. Unit and U.S. Dairy Forage Res. Center Cluster, 411 Borlaug Hall, 1991 Upper Buford Cir., St. Paul, MN 55108–0010
^c U.S. Dairy Forage Res. Center, 8396 Yellowstone Dr., Marshfield, WI 54449

View larger version (20K): [in this window] [in a new window]   Figure 1. Scatterplot of the relationship between Klason lignin concentration and etherified ferulate concentration for four groups of selected clones within each of three perennial grass species. NDF, neutral detergent fiber.

View larger version (26K): [in this window] [in a new window]   Figure 2. Linear responses of Klason lignin concentration to harvest date for high-lignin (HL), low-lignin (LL), high-etherified ferulate (HF), and low-etherified ferulate (LF) clones selected within each of three perennial grass species (slopes and R2 values are shown in Table 3). NDF, neutral detergent fiber.

View larger version (27K): [in this window] [in a new window]   Figure 3. Linear responses of etherified ferulates concentration to harvest date for high-lignin (HL), low-lignin (LL), high-etherified ferulate (HF), and low-etherified ferulate (LF) clones selected within each of three perennial grass species (slopes and R2 values are shown in Table 3). NDF, neutral detergent fiber; SB, smooth bromegrass; RC, reed canarygrass; OG, orchardgrass.

View larger version (25K): [in this window] [in a new window]   Figure 4. Linear responses of 96-h in vitro neutral detergent fiber digestibility to harvest date for high-lignin (HL), low-lignin (LL), high-etherified ferulate (HF), and low-etherified ferulate (LF) clones selected within each of three perennial grass species (slopes and R2 values are shown in Table 3). NDF, neutral detergent fiber; SB, smooth bromegrass; RC, reed canarygrass; OG, orchardgrass.

View larger version (25K): [in this window] [in a new window]   Figure 5. Linear regressions of 96-h in vitro neutral detergent fiber (NDF) digestibility on lignin, esterified ferulates, or etherified ferulates for three perennial grass species.