The current UK Recommended Lists For Cereals (Anon., 1997), include grain quality information on each variety outlining its potential value to the miller, baker or maltster. These grain quality measures are used as a basis for premiums paid to producers. However, no such standards exist for feed grains with the exception that contracts often indicate a minimum specific weight. This is in spite of the fact that feed grains account for 41% of wheat and 50% of barley sales from UK produced cereals. Usage may be increased if its nutritive value was better defined to include information such as the proportion of the starch that is rumen degradable and the rate of degradation of this starch in the rumen. It is vital to know the quantity of starch available to the rumen since it is a major source of energy for microbial protein synthesis (see Reynolds et al., 1997). This study aimed to use the in vitro automated gas production (GP) technique to estimate rate and extent of starch degradation from a large population of wheat grains obtained from wide ranging agronomic conditions and relate this to chemical and quality parameters.