Foundation Plant Services Banner
UC Davis Logo and link
CAES logo and link

Foundation Plant Services Banner

FPS DNA-Based Grape Varietal Identification & Profiling Services

Grapes

Foundation Plant Services offers DNA-based grape variety identification on a fee-for-service basis. The service makes "DNA Fingerprinting" technology available to nursery managers, grape growers, wine makers and other industry representatives. Varieties are identified by comparing the DNA profile of the client's sample to Foundation Plant Services' Grape DNA Identification Reference Database. The database contains DNA profiles of varieties from the major grape growing regions around the world and includes wine grape, table grape, raisin and rootstock varieties. A second service provides the client with the unique DNA profile of the tested vine. Both domestic clients and clients from outside the U.S. may submit samples for analysis. .

Results are typically ready in three to four weeks.

Service 1: DNA Identification of Grape Varieties

This service determines or confirms the varietal identity of a particular grapevine. A sample from the vine in question is typed with a panel of DNA markers. The resulting DNA profile (the DNA Fingerprint) is compared with Foundation Plant Services' Grape DNA Identification Reference Database. Dried leaves are the standard sample, but other tissues including fruit and dormant cuttings can also be fingerprinted. Sample collection materials and instructions are provided as part of the service.

Price: 1-5 samples $345 per sample
6 or more samples $265 per sample

(There is a $50 per sample surcharge for all sample types other than leaves dried using our standard protocol.)

Service 2: DNA Profiling of Grape Varieties

This service provides a unique DNA profile (DNA Fingerprint) of the tested selection. Two separate samples of the selections are typed with additional DNA markers. The use of additional DNA markers ensures to an extremely high degree of confidence that the profile is unique to the selection. The resulting profile is provided to the client.

Price: DNA Profiling $1000 per sample

(Only leaf samples are accepted for the DNA Profiling Service.)

Submitting Dried Grape Leaf Samples for DNA Analysis

Contact Jerry Dangl at the FPS Plant Identification Lab: Direct phone line: 530-752-7540 or E-mail: gsdangl@ucdavis.edu

Please provide contact information, some background regarding the issue you'd like resolved and the number of samples to be tested. For standard leaf samples, a kit containing collection materials and instructions will be sent to you as part of the service. You will receive: blotting paper, plastic bags, silica gel packs, orange desiccant beads and envelopes. Samples other than standard dried leaves require special handling; call to make arrangements. Keep the silica gel and the orange beads sealed until use or they will absorb moisture from the air and become less effective (the orange beads will turn pale).

  1. Collect small young leaves from near the shoot tips. The younger the better. Collect enough leaves to cover the blotting paper without overlapping the leaves. Avoid collecting during a hot spell.
  2. Place the leaves in an envelope between the two sheets of blotting paper. Keep the leaves flat. Do not overlap the leaves.
  3. Place one silica gel packet in the envelope between the blotting paper and the inside surface of the envelope, not with the leaves between the sheets of blotting paper.
  4. Seal the envelope and write the name of the sample on the envelope in pen. Be sure you identify the vine unambiguously. Use the same sample name on Attachment A of the Testing Agreement. Each envelope must contain leaves from only one vine.
  5. Put the sample envelopes into a plastic bag. Up to 10 sample envelopes can be placed into 1 bag.
  6. Put about 50 grams (4 large tablespoons) of orange desiccant beads into the bag with the envelopes and seal the bag. Put this plastic bag into a second bag and add orange desiccant into the outer bag and seal. Keep the bags sealed. If the orange desiccant turns pale, it has absorbed moisture and must be replaced.
  7. Complete "Attachment A" found at the end of the Agreement Form. Use the same sample names on "Attachment A" as on the sample envelopes. Submit "Attachment A" by email, or mail it with the samples. When we receive the samples, we will complete the entire Agreement Form and send it to you for signature.

Mail samples to: (via US Postal Service)
Foundation Plant Services
Attn: Jerry Dangl
University of California
One Shields Ave.
Davis, CA 95616
(via UPS, FedEx or other courier)
Foundation Plant Services
Attn: Jerry Dangl
455 Hopkins Road
Davis, CA 95616