Abstract: It was found that the differences between provenances and families were main sources of variation of seedling growth traits of Masson pine through continued 5 years nursery test, and provenance and family selection may result in high genetic gains. Seedling height and base diameter were under moderate or strong control. There was not significant interaction between family and location. The pollen parents in different years highly influence on seedling height of its offsprings.

Key words: Masson pine, Seedling growth trait, Genetic analysis