%0 Journal Article %A Changhua YUAN %A Fang WANG %A Jun WANG %A Kuiquan LI %A Kuiyou LI %A Lin WU %A Wei WEI %A Yelei YANG %A Yuanxing WANG %A Yuchun YANG %A Zhimin LU %T Variation Analysis of Growth Traits of Offspring and Superior Materials Selection of Pinus koraiensis %D 2025 %R 10.7525/j.issn.1673-5102.2025.05.015 %J Bulletin of Botanical Research %P 816-826 %V 45 %N 5 %X

In order to select the excellent germplasm resources of Pinus koraiensis andprovide materials for national reserve forests construction and afforestation promotion of P. koraiensis，the offspring of superior individuals in the primary P. koraiensis seed garden of Jilin Forest Industry Dew River Technology Group Co.， Ltd. were used as materials. Analysis of variance， estimation of genetic parameters， analysis of general combining ability， correlation analysis and comprehensive evaluation were performed on tree height（H）， diameter at breast height（D_BH） and volume （V） of 218 half-sib families with 19-year-old P. koraiensis， respectively. The superior families were screened and the superior individuals were selected from the superior families. The results showed that there were extremely significant differences in H， D_BH and V among different families， blocks and families×blocks（P<0.01）. The average H of all P. koraiensis families was 3.22 m， the average D_BH was 4.79 cm， and the average V was 0.005 08 m³. The phenotypic variation coefficient of the traits ranged from 25.42% to 82.48%， the family heritability ranged from 0.86 to 0.89， and the individual heritability ranged from 0.23 to 0.38. The average values of H， D_BH and V of family PK20 were the largest， and the general combining ability values of H， D_BH and V of PK20 parent were also the largest. Besides PK20， the general combining ability values of PK33， PK6 and PK46 parents were also larger. H， D_BH and V were significantly positively correlated with each other. Therefore， 10 excellent families were screened out by multi-trait comprehensive evaluation method（5% selection rate）. The average H， D_BH and V of the selected families were 3.85 m， 6.50 cm and 0.007 50 m³， respectively. The genetic gain was 17.30%， 31.02% and 65.08%， respectively， with 11.60%， 23.81% and 62.91% higher than the local control mean value， respectively. By the same method， 10 excellent individuals were selected from excellent families（2% selection rate）. The average H， D_BH and V of the 10 selected individuals was 5.06 m， 10.72 cm and 0.023 99 m³， respectively， and the genetic gain was 11.86%， 17.31% and 38.68%， respectively， with 46.67%， 104.19% and 420.83% higher than the local control mean value， respectively. Taking growth traits as the selection target， the initially selected excellent families and individuals could be used for the application of improved varieties， providing a theoretical basis for genetic improvement of P. koraiensis and providing improved varieties for the double increase of forestry area and volume. The high-quality parents obtained by combining ability analysis could be used in hybrid breeding to produce offspring with better heredity.

%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2025.05.015