Principles, methods, advantages and disadvantages of cross breeding and mutation breeding

Hybrid breeding: principle: gene recombination. Methods: Multi-variety breeding method. Excellent: Excellent characteristics of multiple varieties can be gathered together. Lack: the cycle of obtaining new varieties is long!

Mutation breeding: principle: gene mutation. Methods: The organism was mutated by physical or chemical factors. Excellent: excellent varieties can be obtained in a short time, and some characters can change greatly. Deficiency: there are not many individuals who are conducive to inducing mutation, and a lot of materials need to be processed.