Selection for cold chipping genotypes from three early generations in a potato breeding program |
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| Authors: | Ryan J Hayes Christian A Thill |
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| Institution: | (1) Department of Horticultural Science, University of Minnesota, 305 Alderman Hall, 1970 Folwell Avenue St. Paul, MN, 55108-6007, U.S.A. |
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| Abstract: | Chipping potatoes are an important market for the processing industry. Of the traits influencing chip quality,chip color is
market limiting since other traits have diminished value without light chip color. Cold (4 °C) storage can reduce storage losses and cultivars producing light colored chips directly from cold storage are needed for
this reason. Selection for cold chipping cultivars is traditionally practiced by visual evaluation of progeny the first few
years in the field, followed by selection for cold chipping in years 4–5. Early generation selection for cold chipping may
reduce cultivar development time by identifying good chipping progeny, families and parents earlier in the breeding cycle.
Progeny from 175 4x × 4x families were evaluated from three early generations. They were greenhouse grown tubers (GGT) evaluated
after6 mo. storage using randomly selected progeny, and field grown single hills propagated from either seedling transplants
(FTR), or from greenhouse grown tubers (FGT). Progeny from field grown generations were selected first by visual evaluation,
and then by random selection and chipped after6 mo. (visual selections) or 3 and 6 mo. storage (random selections). Cold chipping
progenies were found in all three early generations. The earliest generations for selection are GGT or FTR, but may be less
efficient than FGT. Correlations suggest that reliable parent and family selection is possible using GGT data. Visual selection
eliminated 4/5 of the good chipping progeny, while identifying 8 of 11,714 genotypes combining visual merit and cold chipping
potential. Increased genetic variation and sexual polyploidization are possible strategies for increasing the number of desirable
genotypes.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | breeding cold chipping early generation selection familyselection potato |
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