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Navigation BulletAbout the Department
Navigation BulletField Seed Program
Navigation BulletPotato Program
Navigation BulletRegulatory Program
Navigation BulletDiagnostic Lab
Navigation Spacer- Seed Health Tests
Navigation Spacer- Barley Loose Smut
Navigation Spacer- Bean Anthracnose
Navigation Spacer- Bean Bacterial
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Navigation Spacer- Pulse Crop
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Navigation Spacer- Soybean Bacterial
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 Navigation Spacer- Genetic Tests
Navigation Spacer- Genetic Purity TestNavigation Spacer - Variety ID Testing
Navigation Spacer- Testing for
Navigation SpacerAdventitous
Navigation SpacerPresence

Navigation Spacer- Potato Tests
Navigation Spacer- Potato Virus
Navigation SpacerTesting
Navigation Spacer- Potato GMO
Navigation SpacerTesting

Navigation Spacer- Sample Sizes
Navigation SpacerRequired for Tests

Navigation Spacer- Fees
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Navigation BulletSeed Lab
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Diagnostic Tests

Potato GMO Testing

The Diagnostic Lab conducts GMO testing of potato in support of the potato certification program and as a service to potato growers requiring this test. Some grower contracts require producers to verify the GMO status of their crop. This test is typically conducted during the winter post harvest test or during the summer virus test.

GMO testing in potato is conducted using an ELISA test, which detects the presence of the Bt-Cry3a protein found in transgenic potatoes containing the Bt gene. Customers are required to submit samples of at least 410 leaflets for this test, as the sample size tested is 400 leaflets. This test can be performed on the same sample as a potato virus test. Samples are composited 40 leaflets per test well for a total of 10 test wells. Results are given as the number of positive test wells per total test wells. Also, leaflet tissue is the preferred and least expensive tissue type to test. Potato sprouts may also be tested for Bt-Cry3a for an additional price. For potato sprouts, a 400 tuber sample would need to be submitted for testing. In this case, samples are composited 5 sprouts or tubers per test well for a total of 80 test wells.

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