出现在育种学家和遗传学家面前的最复杂的问题是创造新的自然界没有的植物种、类型和品种、众所周知,许多新的种是在种间或属间杂交以及驯化引种的情况下出现的。普通的育种方法,在组合和复组合基础上进行的杂交会造成变异性的减少。属间和种间杂交可以增加栽培作物的变异性。远缘杂交虽有很大困难,但它是目前创造新种类的重要 The most complex problem that arises before breeders and geneticists is the creation of new plant species, species and varieties that are not found in nature. It is well known that many new species emerge under interspecific or intraspecific crosses and domesticated introductions . In general breeding methods, hybridization based on combinations and combinations will result in reduced variability. Interspecific and interspecific hybridization can increase the variability of cultivated crops. Although distant hybridization is very difficult, but it is important to create a new species