Plants have an amazing ability to regenerate. This totipotency can be used to regenerate new tissue from small pieces of the original plant. The new plants are genetically identical to the parent plant, which doesn't occur in traditional breeding. In traditional breeding half of the genes come from the mother and the half of come from the father causing a segregation of traits. Tissue culture is a technique to rapidly increase the number of plants while maintaining all of the valuable traits.
From Rose to Callus to Rose