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1 导言北半球分布着100多种松树,这些松树都已根据它们的形态学特征依照分类学进行了分类。另一方面,DUFFIELD 和 CRIT-CHIFIEID 在它们种间杂交适合性的基础上,探讨了松树种间的关系。为了查清这些松树种的可交配性与亲和
1 Introduction There are more than 100 pine trees distributed in the northern hemisphere, which have been classified according to their taxonomic characteristics according to their morphological characteristics. On the other hand, DUFFIELD and CRIT-CHIFIEID discussed the relationship between pine species on the basis of their suitability for crossbreeding. In order to find out the compatibility of these pine species and affinity