Generation of Genetic Determination of Fraxinus mandshurica Seed Orchard of Half Sib and Superior Family Selection

Fraxinus mandshurica seed orchard of 10 years old half sib progeny family difference between tree height,DBH and volume significantly;in the 15 families tested in tree height 13 families than the control,the tree height growth of family was the 1.15 largest times of the control.Diameter were more than the control,the largest family of DBH growth was 1.41 times of the control.Volume than the control,the volume increment the largest family was 2.40 times that of the control;tree height,DBH,volume family heritabilities were 0.11,0.40,0.20,and volume was significantly higher than that of control as the main basis of tree height,DBH,the reference relationship performance,comprehensive evaluation 7,4,9,three superior families,respectively,to improve the 12.4% ~ 14.8% tree height,DBH increased 32.7% ~ 41.1%,volume 120% ~ 140%.7 pedigrees indicators were ranked first,was the best family;chose 1,2,3 superior families from 15 families,in fact,progeny of 10 year old trees,genetic gain high energy 0.7% ~ 0.9%,genetic gain of DBH could obtain 5% ~ 7%,genetic volume can be obtained 6% ~ 8% gain.