Comparative Cell Wall Constituent Levels of Tannin-Free and Tannin-Containing Cultivars of Fababeans (Vicia Faba L.)

Abstract

. 1978. Comparative cell wall constituent levels of tannin-free and tannin-containing cultivars of fababeans (ViciafabaL.). Can. J. Anim. A series of experiments has been carried out with tannin-free and tannin-containing cultivars of fababeans. The in vitro dry matter digestibility of the cotyledon portion of the two groups of fababeans was the same (88.2%) whereas the in vitro digestibility of the testa portion of the tannin-free cultivars was much higher (27 .67o) than that of the tannin-containing cultivars (9.27").

EFFECT OF TANNIN CONTENT IN TWO ISOSYNTHETIC STRAINS OF BIRDSFOOT TREFOIL (Lotus corniculatus L.) ON FEED DIGESTIBILITY AND RUMEN FLUID COMPOSITION IN SHEEP

“…Daily samples ofthe forage fed to the animals, and offeces, were analyzed for crude protein (CP) content, acid detergent fiber (ADF) and organic matter (OM). Results (Marquardt et al 1978) and birdsfoot trefoil (Chiquette et al 1988). Gas release and volatile fatty acid (VFA) production during in vitro incubation were also found to be depressed when tannin concentrations were increased in birdsfoot trefoil (Chiquette et al 1988 …”

“…corrrmun.). Birdsfoot trefoil is also a bloat-safe legume which has been attributed to the oresence of condensed tannins ancl to the hish resistance of its cells to rupture in the rurien lHowarth et al.1982 (Marquardt et al 1978) and birdsfoot trefoil (Chiquette et al 1988). Gas release and volatile fatty acid (VFA) production during in vitro incubation were also found to be depressed when tannin concentrations were increased in birdsfoot trefoil (Chiquette et al 1988 (Barry and Duncan 1984;Barry and Manley 1984).…”

Inheritance, Characterization and Selection of Tannin-Free Fababeans (Vicia Faba L.)

“…This compound pleiotropic effect on plant, flower and seed has been implicated as a predominant coat color. Bond ( 1976) Marquardt et al (1978a) and is similar to that used to distinguish between red and white wheats (Wrigley and McCausland 1977 x Fidrim (UMFB-9 x Kodrim) x Kodrim (Kodrim x x Kodrim …”

“…In this hilum color was not affected. Picard (197 6) study, the term tannin refers to the also found that the tannin-free characteristic condensed form that has been isolated and was controlled by two complementary purified from the seed coat of fababeans recessive genes and that their action had a (Marquardt et al 1978a …”

“…It is concluded that the tannin-free characteristic can be easily introduced into fababean lines. Tannins are well-known constituents of fed to poultry (Marquardt et al 1978b; many plant species. They are naturally Martin-Tanguy etal.…”