Feeding Value Evaluation in Grass and Legume Breeding and Variety Testing: Report of a Debate

Because of the growing interest for the implementation of feed evaluation in grass/legume breeding and variety testing, we organized a survey among breeders, variety testing authorities and animal nutritionists. The survey dealt with 4 topics: the relevance of feed value in breeding and testing, the feed value parameters that should be assessed, a recommended testing method and the impact of the feeding value parameter on the evaluation of a variety. The outcome of the survey was the basis of a debate. Although very contrasting opinions the 3 parties agreed that information on feeding value of varieties is valuable for the farmer esp. when he has to select among high yielding and persistent varieties. Digestibility, protein content and the balance of nutrients in the rumen are the most important feeding value parameters. NIRS is a very useful method to test the feeding value but sample preparation is still labour consuming and differences in phenology have to be taken into account. Concerning the impact of feeding value on the variety evaluation the use of an index, threshold levels or just a description was discussed.