The Seedling Growout® genetic purity test accurately identifies selfs, outcrosses and offtypes in a 400K sample. Grown in uniform environments, the Seedling Growout®’s 400-kernel sample size is the largest sample size offered in the industry allowing for more representation of your seed lots.
The Seedling Growout® test coincides well with trait testing. This popular choice allows customers the advantage of trait testing the very same sample thus giving you confirmation of the source of the problem. A warm germination test is included with the Seedling Growout® test. Results are provided within 14 days.
BT Purity Test
PSR's BT test meets all trait providers requirements by offering a 30 kernel and 90 kernel test. The test accurately detects the presence of BT protein (view our trait table below) using the ELISA lateral flow strip method. Unique only to PSR, the BT test may be integrated with the Seedling Growout® to find the source of problems by detecting selfs and outcross plants. Results are returned within 10 days.
PSR’s Non-GMO test directly detects the trait in the sample. This method is less costly and more accommodating to large sample sizes than DNA testing. PSR's Non-GMO procedure is also less vulnerable to lab contamination than PCR methods. Tests can be made for individual traits or for all commercial transgenic traits in one planting. Spraying seedlings with the chemicals screen GMO traits such as resistance to Liberty and Roundup. Any survivors are sprayed a second time to avoid escapes. Tests for all Bt proteins (view our trait table below) are done on bulked leaf samples, using ELISA lateral flow strips. Planting 6000 kernels allows testing of all the traits to the USDA statistical recommended level used for non-Starlink™ tests (2500K tested per trait). Results are returned within 20 days.
Non-GMO Seedling Growout® Test
Another approach to GMO testing is to use the Seedling Growout® plants of a 400K or 800K sample. In this case, the outcross plants are tagged and tested separately for individual or all GMO traits detecting the source of the GMO contamination. This is perhaps most useful in a seedstock Seedling Growout® especially if the 800 kernel sample size is utilized. Results are returned within 20 days.
Warm & Cold Germinations
The warm emergence test (in corn and soybeans) is used to evaluate seed quality without temperature stress, but with consideration of emergence uniformity. Similar to a warm sand test, seedlings are grown in an artificial mix on a greenhouse bench with minimum of 70 degree F exposure. An emergence rating further describes the uniformity of emergence. Results are returned within 14 days.
The cold emergence test is identical to the warm emergence test but with 7 days of 50 degree F exposure (extended cold test has two weeks of 50 degree exposure) prior to the warm greenhouse bench environment. Results are returned within 16 days.
The herbicide resistance purity test (in corn and soybeans) includes 400 seedlings screened with the herbicide. PSR's herbicide test meets all trait provider requirements. Results are returned within 14 days.
Hybrid ID Check
Identifies any unsure seed lots. Send 30K of the unkown hybrid and 30K of the check hybrid, PSR will tell you if they are identical. Results are returned within 14 days.
Trait Homozygosity Test
Breeders use this to identify ears carrying the trait. Send 30K of each ear. PSR screens the plants of each ear for the trait. Results are returned within 14 days.
Seed Health Tests
Professional Seed Research Inc. has been accredited by the National Seed Health System, under the authority of USDA-APHIS, to perform Phytosanitary Seed Health Testing that may be used in the issuance of a Federal Phytosanitary Certificate. Results are returned within 2-8 days.