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马尾松是我国南方特有的速生及主要用材树种之一,分布广泛,在漫长的系统发育过程中,产生了广泛的遗传变异,而形成各种不同的地理类型。因此,对马尾松地理种源的类群划分及评价是选择优良适生种源的重要依据之一。我省自1979年参加全国马尾松良种繁育协作组,先后组织了5次马尾松种源试验。本文就全省第三次种源试验郴州点所得材料,经回归、相关分析筛选出5年生树高、胸径,1982～1984年平均每年分枝轮数(以下简称分枝轮数)等五个数量指标为依据,运用主成分分析和图象处理的
Pinus massoniana is one of the fast growing and main timber species in South China. It is widely distributed and produces a wide range of genetic variation in the long process of phylogeny, forming various types of geography. Therefore, the classification and evaluation of the geographical provenance of Pinus massoniana is one of the important bases for selecting good provenance sources. Since 1979, our province has participated in the National Masson Pine Breeding and Reproductive Cooperation Group, and has successively organized 5 provenances of Pinus massoniana. In this paper, the results of the third provenance experiment at Chenzhou in the province were screened for five-year tree height and breast diameter by regression and correlation analysis. The average annual number of branch rounds from 1982 to 1984 (hereinafter referred to as the number of branch rounds) Quantitative indicators as the basis, the use of principal component analysis and image processing