Abstract

The “colchicine-grafting” method of doubling the chromosome number of potato cuttings was used successfully for producing hexaploids from the triploid “species”, Solanum x juzepczukii. All the plants with hexaploid flowers were triploid/hexaploid sectorial chimeras. Seeds were obtained from crosses of the hexaploid parts with both an andigena-tuberosum hybrid and a tuberosum variety.

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