Northern Plains Fresh Market Potato Cultivar/Selection Trial Results for 2016 (A1834-16, Feb. 2017)

Potatoes reported were selected from recently released cultivars or from advancing selections, or cultivars that are new to the United States. This includes red-and-yellow-skinned cultivars grown near Big Lake MN and contain graded yield results

Andy Robinson, Extension Potato Agronomist, North Dakota State University/University of Minnesota

Asunta Thompson, Potato Breeder, North Dakota State University

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Potato growers continually are looking for the next potato cultivar that provides high yield and good quality, and can be produced sustainably.

In response to these needs, potato breeders develop new potato cultivars possessing desirable genetic traits. These traits may include increased yield potential; resistance to diseases; better tuber size profile; improved skin color, skin fitness and finish; fewer blemishes; better storability; greater drought tolerance; or enhanced nutrient-use efficiency.

The development of new cultivars can take 10 to 15 years. While in development, potato genotypes are referred to as selections because they are selected from a potato breeding program (these typically are numbered). Cultivars are potato selections that have been named.

With such a long time commitment, determining what new potato cultivars or selections are best suited for production in a given area is essential. For this reason, we have tested newly developed potato cultivars and advanced selections in central Minnesota to determine adaptation and how they respond to local environmental conditions. Studies during multiple years will help determine the best cultivars when grown in various environments.

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 U.S. Standard potato cultivars used by growers, including Red Norland and Satina, served as checks.

In 2016, the variety trial was conducted to identify traits of various cultivars and advanced selections at Big Lake, Minn. Twenty-one red-skinned cultivars and six yellow-skinned cultivars evaluated.

Plots were established in a commercial, irrigated potato field utilizing common potato production practices. A randomized complete block design was utilized with four replicates. Seed tubers were hand cut to 2-ounce seed pieces and suberized for approximately five to 10 days at 55 F and 95 percent relative humidity prior to planting.

Tubers were planted on April 21, 2016, at a 9-inch within-row spacing; rows were spaced 36 inches apart. Plots were single rows 25 feet in length, with 33 seed pieces planted per plot. Plots were harvested on Aug. 16, and the potatoes were stored at 55 F until grading.

The tuber size profile distribution was determined by sorting potatoes into C size (less than 1.9 inches), B size (1.9 to 2.25 inches), A size (2.25 to 3.5 inches) and Chef size (greater than 3.5 inches).

The agronomic data presented in Tables 1 and 2 were statistically analyzed. 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.

Table 1

Table 2

The data provided does not indicate endorsement or approval by the authors, or the NDSU Extension Service 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 U.S. Department of Agriculture/Agricultural Research Service, Colorado State University, North Dakota State University, University of Minnesota and University of Wisconsin.

Filed under: crops, crops-potatoes
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