Relationship of cell wall composition toin vitro cell wall digestibility of maize inbred line stems

✍ Scribed by M�chin, Val�rie; Argillier, Odile; Menanteau, V�ronique; Barri�re, Yves; Mila, Isabelle; Pollet, Brigitte; Lapierre, Catherine

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 117 KB
• Volume: 80
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(200004)80:5<574::aid-jsfa575>3.0.co;2-r

✦ Synopsis

The phenolic equipment of maize stem tissues was investigated in relation to the feeding value of the detergent ®bre components. Sixteen maize inbred lines, including three brown-midrib 3 mutants and their normal counterparts, were selected for highly divergent in vitro cell wall digestibility. These lines were grown during two years. Maize stems were analysed for detergent ®bre concentration, esteri®ed and etheri®ed p-hydroxycinnamic acids, lignin content and structure and in vitro digestibility. A large genotypic variation was found for neutral detergent ®bre, cell wall phenolic composition and cell wall digestibility. Within the normal maize lines the in vitro neutral detergent ®bre digestibility (IVNDFD) of stem fractions was negatively correlated with their Klason lignin content. A multiple regression model based on esteri®ed p-coumaric acid and lignin composition as two explanatory variates accounted for 58% of the IVNDFD variation. In this study, three normal maize inbred lines displaying a lignin content and a cell wall digestibility level close to those observed in the three bm3 lines could be detected, which opens up new breeding avenues.