A Study on the Variation among and within Ecotypes of Pinus tabulae formis

The research on the variation among and within ecotypes of Pinus tabulaeformis was conducted and the differences among the provenances from different elevation origins in the same ecotype was also studied. The results show that there are significant differences in growth both among the ecotypes and differences within the ecotypes. Moreover, the variations among the ecotypes are more important than those within the ecotypes. No significant differences were found among the provenances from different elevation origins in the same ecotype.