内容一、变异的起源(一)突变(二)异核与异核游离作用(三)杂交二、关于适应性问题(一)菌类致病性的适应问题1.培养物对于致病性的适应问题关系2.菌种内生理型的混杂对于致病性的适应问题关系3.异核和异核游离作用对于致病性的适应问题关系4.寄主对于胞子形成与培养性状的适应问题关系5.寄主对于改变病菌致病性的适应问题关系 First, the origin of mutation (a) Mutation (two) Heteronuclear and heteronuclear free (c) hybridization Second, on the adaptive problems (a) the pathogenicity of the strain of adaptation 1. Cultures for pathogenic Adaptation problems 2. Physiological hybrids in pathogenicity adaptations 3. Heteronuclear and heteronuclear freeness effects on pathogenicity 4. Host adaptability to the formation of cytokines and culture traits 5. The host to change the pathogenicity of pathogens adapt to the relationship between the problem