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Comparison of genetic impact on growth and wood traits between seedlings and clones from the same plus trees of Pinus koraiensis

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Journal of Forestry Research 2023年第2期34卷 469-480页

作者： Xiaoting Liu Zhimin Lu Jingui Wu Yuchun Yang Shuchun Li Lin Wu Qingshan Xu Qi Yu Li Zhao Jian Sun Wei Zheng Mulualem Tigabu Xiyang Zhao College of Forestry and Grasslands Jilin Agricultural UniversityChangchun 130118JilinPeople’s Republic of China State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040HeilongjiangPeople’s Republic of China Jilin Provincial Academy of Forestry Sciences Changchun 130031JilinPeople’s Republic of China Lushuihe Forestry Bureau of Jilin Baishan 134506JilinPeople’s Republic of China Forestry Department of Jilin Province Tree Seedling Management StationChangchun 130000JilinPeople’s Republic of China Southern Swedish Forest Research Centre Swedish University of Agricultural SciencesP.O.Box 19023422 LommaSweden

To evaluate the relationships among clones and open pollinated families from the same plus trees and to select elite breeding materials,growth,and wood characteristics of 33-year-old Pinus korainsis clones and families were measured and analyzed.The results show that growth and wood characters varied significantly.The variation due to clonal effects was higher than that of family effects.The ratio of genetic to phenotypic coefficient of variation of clones in growth and wood traits was above 90%,and the repeatability of these characteristics was more than 0.8,whereas the ratio of genetic to phenotypic coefficient of variation of families was above 90%.The broad-sense heritability of all characteristics exceeded 0.4,and the narrow-sense family heritability of growth traits was less than 0.3.Growth characteristics were positively correlated with each other,but most wood properties were weakly correlated in both clones and families.Fiber length and width were positively correlated between clones and families.Using the membership function method,eleven clones and four families were selected as superior material for improved diameter growth and wood production,and two families from clonal and open-pollinated trees showed consistently better performance.Generally,selection of the best clones is an effective alternative to deployment of families as the repeatability estimates from clonal trees were higher than narrow-sense heritability estimates from open pollinated families.The results provide valuable insight for improving P.koraiensis breeding programs and subsequent genetic improvement.

关键词： Pinus koraiensis Korean pine Clonal parents Progeny testing Repeatability Broad-sense heritability narrow-sense heritability

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