论文部分内容阅读
选择适合于育种要求的树木或群体的外部性状(表型),这是目前选择优树的方法的根据。大家知道,个体的表型决定于两个因子,即由因子型决定的遗传性以及外界环境。能不能选出合乎需要的性状,决定于所选的性状是否由遗传性所决定。例如,选择优树的生长速度这一性状时,如果它是由较好的小区环境条件(如土壤、营养面积,没有其它植物竞争等),或遗传结构的某些特点(基因的互相作
The selection of external traits (phenotypes) of trees or populations suitable for breeding requirements is the basis for the current selection of superior trees. As we all know, the phenotype of an individual is determined by two factors, namely the hereditary as well as the external environment determined by the factor. Can choose the desired traits, depending on the selected traits are determined by the genetic. For example, when selecting the trait of growth rate of the superior tree, if it is determined by better community environmental conditions (such as soil, nutrient area, no competition from other plants, etc.) or certain characteristics of the genetic structure