Studies of isozymes in oat species.

Starch and polyacrylamide gel electrophoresis of seven isozyme systems was investigated as a means of identifying wild and cultivated species of Avena with different ploidy levels. By examining the characteristic isoenzymatic patterns, it was shown that there was considerable variability within the different species. However, it was nevertheless possible to unequivocally identify the species of wild oats and to distinguish between the different species belonging to the same genomic set, thus providing a definitive reference technique for the identification of Avena species in seed-testing laboratories. The relationships between Avena species were inferred from the electrophoresis data. The divergence of the A. maroccana - A. murphyi complex and its contribution to the AACC genomes are emphasized.