Th21

Th21 is a genetic notation used in plant breeding that indicates a specific type of chromosome crossing. It describes a hybrid where one chromosome set (T) from one parent is combined with a different chromosome set (h) from another parent, and the "21" refers to the particular crossover or genetic configuration. Essentially, Th21 signifies a deliberate genetic mix aimed at combining desirable traits from two different plant lines, helping breeders develop varieties with improved characteristics such as higher yield, disease resistance, or better adaptation to environments.