North Dakota Fresh Market Potato Cultivar/Selection Trial Results for 2025

Potato cultivars or selections included in this report were selected from recently released cultivars, advancing selections with release potential (numbered lines progressing through the trial process) or cultivars new to the U.S. Standard potato cultivars used by growers served as checks. For comparison, studies conducted in 2019, 2020, 2021 and 2024 evaluated several red- and yellow-skinned fresh potatoes.

In 2025, two trials were conducted to identify traits of red- and yellow-skinned potato cultivars and advanced selections near St. Thomas, North Dakota. Thirteen red-skinned cultivars and 14 yellow-skinned clones were evaluated. Plots were established in a commercial, nonirrigated potato field utilizing common potato production practices. The authors acknowledge J.G. Hall and Sons for hosting these trials.

Prior to planting, urea at 120 pounds of nitrogen (N) per acre was broadcast and incorporated. A randomized complete block design with four replicates was utilized. Plots were 3 feet wide and 30 feet long. Seed tubers were hand-cut to approximately 2-ounce seed pieces and suberized prior to planting.

Tubers were planted on May 30, 2025, in a single row with 9-inch within-row spacing. The number of emerged plants in the entire plot was counted to determine the emergence rate. The number of stems per plant was determined by counting the stems on 10 plants in a row in each plot. Vines were killed with diquat on Sept. 6 and 16, 2025. Plots were harvested on Oct. 2, 2025, with a single-row lifter and thereafter bagged by hand.

After harvest, potatoes were stored at 55 degrees Fahrenheit until grading. The tuber size profile distribution was determined by sorting all potatoes harvested 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 the sum of C + B + A + Chef.

The 2025 agronomic data presented in Tables 1 and 2 were analyzed statistically. These analyses allow the reader to ascertain, at a predetermined level of confidence, whether the differences observed among cultivars/selections are reliable or 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% 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 indicate a large amount of variation that could not be attributed to differences among the cultivars/selections.

The data provided does not indicate endorsement or approval by the authors, 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 public and private breeding programs and industry partners.