Open-Pollination Progeny Test for Superior Tree of Taiwania flousiana

Seedling and field afforestation test for 24 open-pollination progenies of superior trees,i.e.,Taiwania flousiana,Taiwania cryptomerioides and Cunninghamia konishii,were carried out.The research included 3 species' nursery germination rate and height rhythm,curve fitting using Logistic growth model of seedling height by the Marquardt method,significance comparison between species and among T.flousiana open-pollination families by variance analysis method with 6-years-old data,and an evaluation of genetic parameter of T.flousiana growth straits.6 excellent T.flousiana open-pollination families were tentatively selected.The average nursery germination rate of the 3 species were 9.1%,11.3% and 1.3%,respectively.The average height of 1-year-old seedling were 25.1,22.9 and 24.4 cm.The starting and ending date of fast growing period for seedling height growth of the 3 species came later consecutively.The differences of growth traits were significant between species,and among T.flousiana open-pollination families.Heritabilities for DBH,height,single volume of T.flousiana open-pollination family were 0.88,0.87,and 0.91,respectively,six families were selected for 19 families with genetic gain of 52.6% and realized gain of 58.1%.