A new cross, A. strigosa×A. pilosa, was successfully made when A. pilosa was a pollen parent. The hybrid indicated 0-4 bivalents with an average 0.75 bivalents per cell.In A. pilosa×A. ventricosa chromosome configurations of 1III+4II+3I and 1III+3II+5I were most frequentry observed although they usually varied widely.Based on the available cytogenetic evidence the authors arranged all diploid oats in three groups with AsAs (or AA), TATA and CC genomes. They might have a common ancestor and make progress in different trends of their unique specialization.
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Nishiyama et al. (1975) studied this question.
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