Genetic variation and selection for growth in the provenances of Fokienia hodginsii

In order to enrich the Fokienia hodginsii breeding materials and establish the basis of utilization of improved varieties in the experimental zone,the growth traits such as tree height,diameter at breast height(DBH) and volume were examined in an11-provenance test,researching the genetic variation rule of growth in the provenances of Fokienia hodginsii.The results showed that the preservation rate,average tree height,average DBH and average volume of the stand was 71.59%,9.32 m,14.78 cm and0.080 8 m3respectively at the age of 16 years.Significant variation observed among provenances in growth was moderately controlled by genetic factor at provenance level,but it was slight at individual level.According to the genetic variation analysis,Fujian Xianyou,Hunan DaoxianandFujian Longyanprovenance were identified as superior provenances.At the age of 16years,the average tree height,average DBH and average volume of provenances selected were 9.79 m,15.60 cm and 0.093 5 m3respectively,capturing 2.41%,2.73% and 8.51% of provenance gentic gain of these traits.In addition,7 trees were identified as superior individuals.At the age of 16 years,the average tree height,average DBH and average volume of trees selected were11.51 m,20.72 cm and 0.173 5 m3respectively,capturing 5.08%,8.76% and 27.05% of individual gentic gain of measured traits.