Publication Date
1993
Description
Effect of selection in lucerne (Medicago sativa L.) for in vitro dry matter disappearance (IVDMD) and acid detergent lignin (ADL) concentration on the degradabillty of cell-wall polysaccharide was investigated, Lucerne lines that had been previously bidirectionally selected for herbage ADL concentrations were selected for high and low IVDMD of stem bases. In vitro rumlnal degradability of cell-wall neutral sugars and uronic acids from half-sib progeny of the selected populations was determined on basal stems from two cuttings. Selection resulted in greater degradability of non-cellulosic polysaccharide components from cell walls of low ADL populations than from high ADL populations for both cuts, Selection for high IVDMD resulted In greater digestibility of some neutral sugars than observed for the low IVDMD populations, but only for one cut. Cellulose (glucose residues) degradability was unchanged by either selection regime. Selection for lignin appears to be more effective for improving cell-wall degradability of lucerne than selection for IVDMD.
Citation
Jung, Hans-Joachim G.; Smith, Richard R.; and Endres, Craig S., "Cell-wall Polysaccharide Degradability in Divergently Selected Lucerne" (2024). IGC Proceedings (1993-2023). 21.
https://uknowledge.uky.edu/igc/1993/session14/21
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Cell-wall Polysaccharide Degradability in Divergently Selected Lucerne
Effect of selection in lucerne (Medicago sativa L.) for in vitro dry matter disappearance (IVDMD) and acid detergent lignin (ADL) concentration on the degradabillty of cell-wall polysaccharide was investigated, Lucerne lines that had been previously bidirectionally selected for herbage ADL concentrations were selected for high and low IVDMD of stem bases. In vitro rumlnal degradability of cell-wall neutral sugars and uronic acids from half-sib progeny of the selected populations was determined on basal stems from two cuttings. Selection resulted in greater degradability of non-cellulosic polysaccharide components from cell walls of low ADL populations than from high ADL populations for both cuts, Selection for high IVDMD resulted In greater digestibility of some neutral sugars than observed for the low IVDMD populations, but only for one cut. Cellulose (glucose residues) degradability was unchanged by either selection regime. Selection for lignin appears to be more effective for improving cell-wall degradability of lucerne than selection for IVDMD.
