Abstract
Approximately 25% of progenies from crosses between diploid seed-parents and a spontaneous autotriploid included trisomic plants. The frequency of trisomics from self-pollinated or female trisomics ranged from 5 to 50%. The frequency of pollen mother cells with a trivalent from trisomics ranged from 21 to 74%. Seed-set was greatly reduced in trisomics compared with diploids. The phenotypic alterations of trisomics could not be satisfactorily used to identify different trisomes. Trisomes from the autotriploid and from colchicine treatment were compared and found to be different with respect to five characteristics.
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