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United States Department of Agriculture

Agricultural Research Service

Research Project: POTATO GENETICS, CYTOGENETICS, DISEASE RESISTANCE, AND PRE-BREEDING UTILIZING WILD AND CULTIVATED SPECIES Title: Amylose Content in Tuber Starch of Potato Cultivars

Authors
item Jansky, Shelley
item Fajardo, Diego

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: August 2, 2010
Publication Date: August 17, 2010
Citation: Jansky, S.H., Fajardo, D.A. 2010. Amylose Content in Tuber Starch of Potato Cultivars [abstract]. 4th Annual Plant Breeding Meeting.

Technical Abstract: Potato tuber is mostly water and starch. Approximately 20% of fresh tuber weight is the starch and the remainder is water. Most of the starch in the tuber, approximately 75%, is amylopectin and 25% amylose, but can vary depending on the cultivar. A total of 162 American (85) and foreign (77) potato cultivars were evaluated for amylose content in the tuber. A wider range of amylose content was found in the foreign varieties (27.2% - 39.1%) than in the American ones (28.2% - 36.6%). A higher amylose content mean was found in the foreign (34%) compared to the American cultivars (31.4%) was the lowest. Overall, a narrower genetic background based in the amylose content in the American cultivars could be inferred based on these results. The discovery of varieties with high and low amylose content in the tuber can be useful as potential parents in breeding programs.

Last Modified: 10/22/2014
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