Genetic and environmental variation of useful traits in a collection of naked barley II. Quality related traits

Different traits related to grain quality (thousand kernel weight, starch, protein, lysine and beta-glucan contents) have been assessed on 49 naked ba rley accessions, belonging to six different botanical varieties and origina ted from three genebanks. The accessions were grown during three consecutiv e years in the experimental fields of the Institute of Barley at Karnobat, Bulgaria. The relationships existing between the different quality traits w ere analysed. The effect of climatic factors on the different components of quality was also studied, by considering the variation across years. Acces sions were compared by taking into account their origin. Finally, some acce ssions with high protein, lysine or P-glucan content, were listed to be use d in breeding programs.