选择是林木育种的主要手段。本讲首先说明选择的一般意义,然后着重介绍林业生产中常用的两种混合选择方法,即:种源选择和母树林选择。人们把符合需要的个体或类型,从混杂的群体中挑选出来的过程,叫做人工选择。因为这种选择通常是根据表现型作的选择,所以又可以叫做表现型选择。选择不仅可以单独创育良种,同时也是其它育种方法中不可缺少的 Choice is the main means of tree breeding. This lecture first explains the general meaning of choice, and then focuses on two commonly used methods of mixed selection in forestry production: provenance selection and parental selection. People choose to meet the needs of individuals or types from a mixed group of selected process is called manual selection. Because this choice is usually based on the choice of phenotype, so it can be called phenotypic choice. Choosing not only to breed the seeds alone, but also to other breeding methods is indispensable