生长和木材性状耦合评价红松半同胞家系OA北大核心CSTPCD

Pinus koraiensis is an important tree species used as fruit in northeast China,but due to its long growth cycle,its genetic improvement progress is slow.In order to evaluate and screen the elite P.koraiensis germplasm resources,36 half-sib families of 20-year-old P.koraiensis from Xiyang forest seed orchard in Jilin Province were used as materials,and the growth traits and wood properties of different families were investigated.The results of variance analysis showed that the differences of each trait among families reached extremely significant level(P＜0.01),and the phenotypic variation coefficients of different investigated traits was 5.89％～45.21％.Except trait straightness(0.46),the family heritabilities of other traits exceeded 0.5,which all belonged to high heritability.Correlation analysis results showed that the growth traits such as tree height and diameter at breast height had significantly positive correlations(r＞0.663).The contents of hemicellulose,cellulose and holocellulose were significantly correlated with each other among wood traits,while only cellulose and holocellulose were negatively correlated with some growth traits among growth traits and wood properties.The results of principal component analysis showed that 14 traits constituted five principal components,and the cumulative contribution rate was 79.24％.The comprehensive evaluation method was used to evaluate 36 half-sib families,with an admission rate of 10％,three elite families(PK61,PK29 and PK22)were selected according to their growth traits,and the genetic gain of each growth trait ranged from 6.41％-33.91％.According to wood properties,three elite families(PK16,PK78 and PK10)were preliminarily screened,and the genetic gain of each wood trait ranged from 1.08％-6.72％.Combined with growth and wood properties,three excellent families(PK61,PK29 and PK44)were selected,and the genetic gain of each index ranged from 0.27％-37.28％.The elite families selected in this study can provide the basis for the selection of improved varieties of P.koraiensis.