A Database for Triticeae and Avena
II. 18. Screening for Low Acid-Soluble beta-glucan Barleys.
R. C. M. Lance and R. A. Nilan, Department of Agronomy and Soils, Washington
State University, Pullman, Washington 99164 (U.S.A.)
Barley endosperm cell walls predominantly consist of beta-glucans which
have been implicated as an undesirable factor in malting and brewing quality
and also in nutritional quality for monogastric animals. A random selection
of 543 Ethiopian barleys from the USDA world collection were screened for
low acid-soluble beta-glucan content (Greenberg and Whitmore, 1974). Barley
flour was extracted using a KCl/HCl buffer (pH 1.5) for 4 hr at 40°C.
The supernatant from centrifuged samples was equilibrated at 20°C and
viscosity estimated using an Ostwald viscometer. Low viscosity lines have
been selected and are being used in genetic studies and for parental material.
The results of the screening are shown in Figure 1. One selection, PI 356,497,
shows considerable promise especially with regard to other kernel characteristics.
Figure 1. Acid-Soluble Viscosities
Greenberg, D. C. and E. T. Whitmore, 1974. J. Inst. Brew. 80:31-33.
BGN 10 toc
BGN Main Index