Study on the Genotypic Stability in Loblolly Pine

The Eberhart-Rusell stability analysis method has been used to evaluate the genotypic stability and site productivity of 19 loblolly pine provenances. The results of this study showed that:(1)6 provenances including Pasquotank N C,Charleston S C,trinity T X,Livingston L A,Georgetown S C and Junes M S were found to have high productivity,stability and wide adaptation. There are three provenances(Nassau F L,Evans G A,Marion F L)which were found to have the high productivity,low stability and could grow at sites specially appointed.(2)Loblolly pine can have a great development potential at low mountain and hilly regions in eastern parts of Sichuan and Guizhou.(3)In order to bring the superior provenances into full play in the afforestation in our country,more attention should be paid to the selection,improvment and management of the planting site besides the superior provenances selection.