Abstract:

The genetic diversity and relationship of five major malt qualities, such as malt extract, diastatic power, αamino nitrogen, Kolbach index, protein, were assessed in a collection of 73 barley varieties originated from different regions. The results showed that there was great variation of malting qualities among barley varieties. All barley varieties had the higher generalized ShannonWeaver genetic diversity index for five malt qualities. The result of correlation analysis also indicated that there was complicated relationship among malt qualities. Seventythree varieties were classified into three groups by the dynamic cluster analysis, and varieties within different groups applied to different utilization. All of results provided the basic data for the diverse utilization of these barley germplasms．

Key words: barley (Hordeum vulgare L.), malt quality, genetic diversity, dynamic cluster analysis