Descriptors :
Avena sterilis,Clustering analysis,Prinncipal-component analysis,Canonical discriminate analysis,Geographic distribution
Abstract :
A sample of 457 (Avena sterilis L.)accessions from the World Oat Collection maintained at the Germplasm Laboratory, Beltsville,Maryland,USA, was studied by multivariate analyses to explain the phenotypic relationships among the entries.According to these anlyses,patterns of seed trait associations suggest that diversity may have geographic patterning.For example,the accessions from countries and islands of the westrn Mediterranean tend to have a common set of traits.Number of spikelest per panicle and groat weight and dimensions were important traits that discriminated the A. sterilis accessions into the group. It was concluded that region-specific adaptations are responsible for occurrence of certain traits and traits associations in specific geographic region.
