N.D. Fresh Market Potato Cultivar Trial Results

Published online: Jan 24, 2020 Articles, Seed Potatoes
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Source: North Dakota State University

Potato cultivars or selections included in this report were selected from recently released cultivars or from advancing selections with release potential (numbered lines progressing through the trial process), or cultivars that are new to the US. Standard potato cultivars used by growers served as checks.

In 2019, two trials were conducted to identify traits of red-skinned and yellow-skinned potato cultivars and advanced selections at Hoople, N.D. Seventeen red-skinned cultivars and 30 yellow-skinned cultivars were evaluated. Plots were established in a commercial, nonirrigated potato field utilizing common potato-production practices.

Prior to planting, urea at 120 pounds of nitrogen (N) per acre was broadcast and incorporated. A randomized complete block design was utilized.

Seed tubers were hand cut to approximatley 2-ounce seed pieces prior to planting. Tubers were planted on May 31, 2019, in rows that were spaced 38 inches apart. Plots were 6.3 feet wide and 20 feet long.

Vines were desiccated on Sept. 8 and 13 with diquat. Red-skinned potato plots were harvested on Oct. 7. About two-thirds of the yellow-skinned potatoes were harvested on Oct. 8 and the remainder were harvested on Oct. 25. Because of the challenges with harvesting the yellow-skinned tubers, specific gravity average is shown only for plots harvested on Oct. 8 and is not analyzed statistically.

After harvest, potatoes were stored at 55 F until grading. The tuber size profile distribution was determined by sorting potatoes into C size (less than 1.875 inches), B size (1.875 to 2.25 inches), A size (2.25 to 3.5 inches), and Chef size (greater than 3.5 inches). Total yield is a summation of C + B + A + Chef.

The agronomic data presented below were analyzed statistically. These analyses allow the reader to ascertain, at a predetermined level of confidence, if the differences observed among cultivars/selections are reliable, or if they might be due to error inherent in the experimental process.

The LSD (least significant difference) values beneath the columns apply only to the numbers in the column in which they appear. If the difference between two cultivars/selections exceeds the LSD value at 0.05 or 0.10, it means that with 95 or 90 percent confidence, respectively, the higher-yielding cultivar/selection has a significant yield advantage. When the difference between two cultivars/selections is less than the LSD value, no significant difference was found between the two under these growing conditions.

The CV stands for coefficient of variation, and is expressed as a percentage. The CV is a measure of variability in the trial. Large CVs mean a large amount of variation that could not be attributed to differences in the cultivars/selections.

The data provided does not indicate endorsement or approval by the authors, or NDSU Extension or University of Minnesota Extension. Reproduction of the tables is permissible if presented with all the same information found in this publication (meaning no portion is deleted and the order of the data is not rearranged).

The authors acknowledge the contribution of cultivars and advanced selections for this work from the breeding programs at North Dakota State University, the Univerity of Minnesota, the U.S. Department of Agriculture-Agricultural Research Service, Colorado State Univertity, the Universiy of Wisconsin, Michigan State University, EBE Farms, Northern Konstar Potatoes, Parkland Seed, Real Potato and SunRain.