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United States Department of Agriculture

Agricultural Research Service

Title: Evaluation of New Sources of Species Germplasm That Chip Directly from 2 Degree C Storage

item Hanneman Jr, Robert

Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: April 14, 1995
Publication Date: N/A

Technical Abstract: The ability of potato cultivars to chip directly from storage is of particular interest, especially with the pending loss of sprout inhibitors. Only a few varieties are able to chip directly from 7C storage, and none from colder temperatures without reconditioning. This study was directed at identifying potential new sources of species germplasm that are able to chip acceptably from temperatures of less than 4C. In an initial study reported earlier, 828 accessions (PIs) representing 98 species were screened. They were stored at 2C and chipped three to six months after harvest. Accessions of 24 species were identified which had some plants with chip scores of 4 or less, based on a scale of 1-10. Approximately 270 of the better performing accessions were rescreened as families a second year. One hundred and twenty seven accessions were screened on an individual plant basis to identify specific clones with good chipping characteristics. Based on two year's data, twenty-nine accessions representing 15 different species have been selected as the most promising. Solanum medians, S. okadae, S. pinnatisectum, S. raphanifolium and S. sogarandinum stood out as exceptional among the species. Selection of accessions for direct chipping ability based on prior year performance was demonstrated to be effective.

Last Modified: 4/19/2015
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