A Preliminary Report on the Growth Difference of Differet Provenance Families of Ormosia yunnanensis Prain and the Selection of Superior Families

The growth traits and genetic parameters of 16-year-old Ormosia yunnanensis experimental forest with 35 families from 4 provenances were analyzed in Puwen Farm, Yunnan Academy of Forestry and Grassland in 2019.The results showed that there were extremely significant differences in tree height, DBH and individual volume among provenances and families.The average diameter at breast height of P₂ is 18.3 cm, and the average individual volume is 0.199407 m³.The genetic gains of DBH and individual volume were 27.69% and 75.29% respectively.The average tree height of P₇ is 16.8 m, and the genetic gain of tree height is 24.15%.The genetic gain of P₁₀ tree height reached 22.71%, the genetic gain of DBH reached 21.87%, and the genetic gain of single plant volume reached 72.45%.P₂, P₇ and P₁₀ among the provenances of Puwen were identified as the most suitable families for planting in the Puwen experimental forest farm (hot area).