In seed testing, the grow out test is conducted to determine

In seed testing, the grow-out test is conducted to determine Genetic purity.
Grow out test is a test that is conducted to determine the genetic purity of given seed lots. Genetic purity of seeds refers to the trueness to type. If the seed possesses all the genetic qualities that the breeder has placed in the variety, it is said to be genetically pure.
Genetic purity is used to maintain a variety from generation to generation and in the management of genetic resources e.g. in genebanks.