Currently there are two main methods for developing new varieties. One is traditional breeding, a natural technique involving seed selection and cross-pollination, akin to eugenics. But it is slow and has unpredictable results.
目前全球植物品種改良方法主要有兩種，一種為傳統育種，就是選種後以花粉交配等自然方法來孕育下一代，就像「優生學」一樣，速度緩慢而效果難以預期。