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Variations in growth traits and wood physicochemical properties among Pinus koraiensis families in Northeast China

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Journal of Forestry Research 2022年第5期33卷 1637-1648页

作者： Qinhui Zhang Xiaona Pei Xianbo Lu Chunli Zhao Guangzhi Dong Wanling Shi Liankui Wang Yanlong Li Xiyang Zhao Mulualem Tigabu College of Forestry and Grassland Jilin Agricultural UniversityChangchun 130118People’s Republic of China State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China Sanchazi Forestry Bureau of Jilin Province Baishan 134702People’s Republic of China Southern Swedish Forest Research Centre Swedish University of Agricultural SciencesPO Box 4923053 AlnarpSweden

This study aimed to explore and improve the different economic values of Pinus koraiensis(Siebold and Zucc.)by examining the variations in 6 growth traits and 9 physicochemical wood properties among 53 *** half-sib *** traits assessed included height,diameter at breast height,volume,degree of stem straight-ness,stem form,and branch number per node,while wood properties assessed included density,fiber length and width,fiber length to width ratio,and cellulose,hemicel-lulose,holocellulose,lignin,and ash *** for degree of stem straightness and branch number per node,all other traits exhibited highly significant variations(P<0.01)among *** coefficients of variation ranged from 5.3(stem form)to 66.7%(ash content),whereas,the herit-ability ranged from 0.136(degree of stem straightness)to 0.962(ash content).Significant correlations were observed among growth traits and wood physicochemical *** component analysis identified four distinct groups representing growth traits,wood chemical and physical properties,and stem form ***-trait comprehensive evaluation identified three groups of elite families based on breeding objectives,including rapid growth,improved timber production for building and furniture materials,and pulpwood *** specific families should be used to establish new plantations.

关键词： Growth and wood traits Pinus koraiensis Principal component analysis family selection Economic benefits

Study on the variation in and selection of Fraxinus mandshurica provenances and families in northeast China

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Journal of Forestry Research 2023年第2期34卷 519-529页

作者： Junfei Hao Na Chen Pingyu Yan Kaiyuan Xu Lei Zhang Hanguo Zhang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China

Fraxinus mandshurica *** one of the main afforestation species in northeast China,and there is great demand for improved *** *** results of an investigation into and analysis of the growth traits of *** provenances and families showed that there were significant differences in different ***,variations in growth traits decreased year by *** was a significant negative correlation between tree heights of the provenances and sunshine hours in their areas of *** provenances of Xinglong,Hailin and Wuchang were selected based on the volume of 18-year-old *** average genetic gain from the selection of fast-growing provenances was 19.4%.Ten superior fast-growing families were *** average volume of the selected families was22.6%,higher than that of all *** correlation coefficient between heights at 6-year-old and at 18a was 0.838for provenances,and between heights at 4-year-old and at 18-year-old was 0.303 for *** results indicate that early selection for height in provenances or families could be performed at 6 years or 4 years,*** selection for DBH and volume in families could start at 8 years.

关键词： Fraxinus mandshurica Provenance family selection Early-late correlation

Phenotypic and genetic parameter estimation of juvenile growth and bottom color traits in half-smooth tongue sole,Cynoglossus semilaevis

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Acta Oceanologica Sinica 2016年第10期35卷 83-87页

作者： LIU Feng Key Laboratory for Sustainable Development of Marine Fisheries of Ministry of Agriculture Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Fisheries and Life Science Shanghai Ocean UniversityShanghai 201306China Marine and Fishery Research Institute Zhejiang Ocean UniversityZhoushan 316021China

Half-smooth tongue sole（Cynoglossus semilaevis） is a commercially important fish species. There were no reports about accurate genetic parameters of growth traits in C. semilaevis, despite efforts aimed at the culture of this species. Therefore, the main goal of this study was to estimate the parameters for the early growth traits（total length, body depth and body weight） of C. semilaevis based on the data obtained from 80 families. The trait of fish with pure white bottom or not（named as the trait of bottom color） was also analyzed. All the heritabilities estimated for the traits were medium, which varied from 0.210 to 0.362. Genetic correlations among growth traits were highly positive, varying from 0.913 to 0.959, indicating that selection of one of the three traits would result in correlated increase in the others. Also, genetic correlations between bottom color and growth traits were positive and varying from 0.241 to 0.353, suggesting that selection for the bottom color can be utilized to enhance the selection of growth traits. In addition, fish from the top performing 16 full-sib families were selected as broodstock, based on the above analysis and the comparison of family breeding value. This research provides an important basic material to implement selective breeding in C. semilaevis.

关键词： half-smooth tongue sole Cynoglossus semilaevis growth trait bottom color genetic parameter family selection