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杉木优良产地的鉴定及其遗传优势的检验,是杉木树种遗传改良的重要组成部分。这项试验于1974年开始,在1979年结束。 遗传优势研究的初步结果证实,十一个产地四年生的表型差异,在1％(或5％)的平准上存在显著性。 在产地平准上,产地之间的变异通常有些合适的类型,产地与地点的适应性的生态群,有可能形成产地变迁模式的基础。根据这些试验的结果,在杉木自然分布区域之内,可区划成三个育种区:“中心”、“一般”和“边缘”。 从方差分析的结果看出,在中心区的亚群体比之在边缘区的亚群体,在遗传上具有更大的稳定性。杉木产地变迁模式的发展,对于当地(乡土)种是完全适合的。因此,用当地种的“优树”(加号树)建立种子园是适宜的。
The identification of excellent origin of Chinese fir and the test of its genetic predominance are important components of the genetic improvement of Chinese fir. The trial began in 1974 and ended in 1979. Preliminary results of the study of genetic predisposition confirmed that phenotypic differences in four-year-olds in eleven places of origin were significant at 1% (or 5%) of the level. In the origin leveling, the variation between the origin is usually some suitable type, origin and location of the adaptive ecological group, it is possible to form a basis for the pattern of origin change. According to the results of these experiments, three breeding areas can be zoned within the natural distribution area of Chinese fir: “center”, “general” and “edge”. From the results of analysis of variance, it can be seen that the subpopulations in the central area are more genetically stable than the subpopulations in the marginal area. The development of the mode of origin change of the fir is completely suitable for the local (native) species. Therefore, it is appropriate to establish seed orchards with the local species “gifted trees” (plus trees).