Abstract
existed between varieties. Is this variation in ascorbic acid content due to the genetic constitution of the aerial portion or to the genetic constitution of the underground portion of the potato plant? To study this question an experiment was designed in which plants were produced with aerial and underground portions of different genetic constitution. This was done by grafting scions from varieties which produce tubers with a low ascorbic acid content on rootstocks of varieties which produce tubers with a high ascorbic acid content. The reverse combination was also made. In addition, scions of each variety were grafted on their own rootstocks. Thus, it was possible to separate the effect of the genetic constitution of underground and of aerial portions of potato plants on the ascorbic acid content of the tubers. Procedure
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