Selection by Open-Pollination Progeny Test of the 2nd Generation Cunnihamia lanceolata Seed Orchard and Their Parent Cone Traits

1-year bare-rooted Cunninghamia lanceolata seedlings from open-pollination progenies of the 2nd generation seed orchard in Huitong, Forestry Insititute of Hunan province were planted in 2011 in Guangping of Huitong, Hunan province. 35 famililes were tested with mixed seed and seedling as control. Continuous investigations had been conducted from 2012 to 2015. The result demonstrated that it had great difference of seedling height and DBH among families. Mean seedling height, DBH and single tree volume of 6-year seedlings was 4.17m, 5.02cm and 0.005 91m3. Height growth from 2012 to 2015 of tested families indicated that mean heritability of height was from 0.344 to 0.434. Mean DBH and volume heritability of 6-year seedlings was 0.466, 0.409. 9 families were selected from the tested 35 ones, their mean height, DBH and single tree volume of 6-year seedlings was 4.90m, 6.0cm, 0.00841m3, and was 18.2%, 24.1% and 42.3% higher than that of means of 35 families. The genetic gain of growth traits was 6.36%, 8.95% and 17.33%. Intergrated evaluation on cone traits of mother tree of selected 9 families resulted 4 progeny of clones with fast-growing and high-yield characteristics was chosen with their mean cone weight of 7.7kg each tree.