Genetic variation and selection of Cryptomehia fortunei seed orchard parents

The relevances and genetic variation of the growth traits,wood quality and form auality traits of 32 years old Cryptomeria fortunei seed orchard parents were studied in this paper.The results are as follows: the differences of growth traits among the provenances and clones are very significant,the differences of bark rate among the provenances and clones are significant,and the other wood quality traits were not significant.The correlations of growth traits at an early stage and mature are some significant,and the correlation are more strong at clones level,The correlations of growth traits and wood quality traits were not obviously regular.Through comprehensive comparison,18 excellent Cryptomeria fortunei seed orchard parents have been selected,the average volume was 0.898 09 m3,the average wood basic density was 0.313 11 g/m3,the average ratio of heartwood timber was 58.03%,and the average eccentricity was 0.02% when Cryptomeria fortunei seed orchard parents are 32 years old.These selected parents can be used to hybrid parents or parents of high-generation seed orchard.