ELECTROPHORETIC PATTERNS OF OAT PROLAMINES AND SPECIES RELATIONSHIPS IN AVENA

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Abstract
Starch gel electrophoretic studies on seed prolamines of 17 different di-, tetra- and hexaploid Avena spp. were undertaken to determine species relationships and the evolutionary process of the polyploids. Significant intraspecific variation was observed. Electrophoregrams of each species were obtained by superposing all the bands found in the same species, and in total, 17 bands were observed. Clear differences were found between species in their patterns, which allowed determination of the bands specific to 3 genomes (A, C and D). Like the diploids, the tetraploids can be divided into 2 groups based on electrophoretic patterns: A. barbata and A. magna-A. murphyi. A. magna-murphyi group was derived from both the A and C genome species of diploids while A. barbata was derived from the A genome species only. The similarity between A. magna and A. murphyi was confirmed. The hexaploids were derived from A. magna-murphyi group.