对来自南方１４个杉木种子园的１１２个优良家系在８个测试点进行了生长的遗传稳定性评定。在材积ＡＭＭＩ模型分析基础上所作的空间分析结果表明，参试家系在生长性能和遗传稳定性方面有着明显的差异，但具广谱稳定性且生长表现卓越的家系所占的比例较少，并且大多来自广西区种子园。因此在作优良家系选择和推广时，必须先试验后推广，因地制宜。 112 elite families from 14 Chinese fir seed orchards in southern China were assessed for genetic stability at 8 test sites. Spatial analysis based on AMMI model analysis showed that there was a significant difference in growth performance and genetic stability among the tested families, but there was less proportion of families with broad-spectrum stability and excellent growth performance, and Mostly from Guangxi Seed Park. Therefore, in making good family selection and promotion, we must first test the promotion, according to local conditions.