Certification of Actual Genetic Gains from Good Planting Materials in Pinus massoniana

The genetic gain test plantations of masson pine located in Wuping of Fujian (China) were used to certificate realized genetic gain of superior provenances, seed stands and clonal seed orchards. Pilot and demonstration plantation indicated that application of superior provenance will bring on marked increase of productivity. At good site, the genetic gains of tree height and DBH at age 8 for both superior provenances (Ningming of Guangxi and Xinyi of Guangdong) were 17%～47% and 12%～25% respectively. Progeny of four seed stands at age five (including Wuping of Fujian, Jian of Jiangxi, Ningming of Guangxi and Xinyi of Guangdong) did not show significant expected genetic gain. The progeny of some seed stand was not as good as check. Growth performance of two seed orchard seedlots (Tengxian of Guangxi and Huangping of Guizhou) at different latitude and site demonstrated high realized genetic gains which were related to site condition tested and clone constitute of seed orchard. Marked genetic gain of seed orchard seedlot from Tengxian of Guangxi was only found at good site. The genetic gain of seed orchard seedlot from Huangping of Guizhou was high in spite of site condition, because of its high growth rate and genetic stability.