我们在长期引种桉树的实践工作中,发现桉树在长期适应新的环境条件的过程中,其生态特性会产生许多变异;同时,桉树又是一个异花授粉的树种,在自然生长情况下,种间杂交非常容易发生从而产生许多变种、交型,不仅型态干差万别,而且生长优劣也十分悬殊。在良种繁育过程中,我们可从利用桉树变异这个特点,提 In the long-term practice of introducing eucalyptus, we found that eucalyptus has many variations in its ecological characteristics during the long-term adaptation to new environmental conditions. In the meantime, eucalyptus is another cross-pollinated tree species. Under the condition of natural growth, Very easy to occur between the hybrids resulting in many variants, pay-type, not only the type of dry, and the pros and cons of growth is also very poor. In the breeding process, we can make use of the characteristics of eucalyptus mutation