Progress of Genetic Improvement of Pinus yunnanensis and Breeding Strategy Analysis

Pinus yunnanensis is characterized by heterozygosity,environmental heterogeneity and gene fluidity,the genetic diversity of this species is extremely abundant from population and provenance level to gene level,which implies the enormous potential for genetic improvement.Through reviewing the genetic improvement of P.yunnanensis,it is summarized a sum of study results are achieved in both study and practice during the past 40 years,still the genetic improvement of this tree species is in the level of seed production forest and the first generation seed orchard.Five aspects of breeding strategies of P.yunnanensis were proposed.