Nurserymen who use this service will be able to ensure a higher quality product to their clients. Citrus growers who have tree lots tested before purchasing will ensure better production from their future orchards. Nurserymen should plant seed numbers twice that of the final desired rootstock number. Seed batches or seedling populations can be tested for percentage off-types. Roguing should be carried out visually at least to the level indicated by the off-type test.
Growers can have a line of nursery trees tested for percentage off-type prior to purchase.
For further information regarding off-type testing please contact the authors. Frequency and characteristics of nucellar and zygotic seedlings in three cultivars of trifoliate orange. The propagation of citrus. Cal., Agric Sci. Identification and performance of citrus trees on nucellar and zygotic rootstocks.