Abstract

Tubers of a given variety from the same plant and from different plants grown in the same area and in diverse geographical locations were found to have visually indistinguishable protein patterns with acrylamide gel electrophoresis. Although total protein levels were considerably different for a given variety grown in two separate locations, their protein patterns were essentially similar. On storage four of the five varieties showed small but distinct alteration in the mutual density relationship of some of their bands. It is concluded that variety identification based on the protein patterns alone, particularly of stored tubers, might be ineffectual in those cases where the protein patterns lacked sufficient unique character.

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