The genetic testing and early evaluation on Toona fargesii dominant trees
In order to understand the growth characteristics and genetic variation patterns of Toona fargesii,a test was conducted to determine the offspring of superior trees.Based on the three breeding value method,the results of the test were comprehensively evaluated,and excellent families with high genetic gain were screened for promotion and utilization,providing a theoretical basis for the selection and application of Toona fargesii.The results showed that the average tree height,ground diameter,and preservation rate of the experimental forest of Toona fargesii open-pollinated families tested at 2 years old were 1.39 m,4.32 cm,and 89.0％,with phenotypic variation coefficients of 29.1％,25.5％,and 16.0％respectively;The inter group,inter family,and inter family x inter group differences in tree height and diameter traits in the experimental forest of the Chinese toon family have reached extremely significant levels,and the preservation rate has reached extremely significant levels among inter group and inter family differences.The three traits of the experimental forest of Toona fargesii toon were subjected to moderate or higher genetic control at the family level(0.44～0.79).Cluster analy-sis,genotype grouping,and BLUP breeding value method were used for comparative selection analysis.Three excellent Toona fargesii families were preliminarily screened with a 25％selection rate,which can be used for go a steppromotion and genetic breeding research.
NETL
NSTL
万方数据
