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    赵奋成, 郭文冰, 林昌明, 等. 湿地松自由授粉家系松脂产量性状和生长性状的遗传变异分析[J]. 华南农业大学学报, 2020, 41(4): 90-94. doi: 10.7671/j.issn.1001-411X.201911002
    引用本文: 赵奋成, 郭文冰, 林昌明, 等. 湿地松自由授粉家系松脂产量性状和生长性状的遗传变异分析[J]. 华南农业大学学报, 2020, 41(4): 90-94. doi: 10.7671/j.issn.1001-411X.201911002
    shu
    ZHAO Fencheng, GUO Wenbing, LIN Changming, et al. Genetic variation analysis on oleoresin yield and growth traits of Pinus elliottii open-pollinated families[J]. Journal of South China Agricultural University, 2020, 41(4): 90-94. doi: 10.7671/j.issn.1001-411X.201911002
    Citation: ZHAO Fencheng, GUO Wenbing, LIN Changming, et al. Genetic variation analysis on oleoresin yield and growth traits of Pinus elliottii open-pollinated families[J]. Journal of South China Agricultural University, 2020, 41(4): 90-94. doi: 10.7671/j.issn.1001-411X.201911002
    shu

    湿地松自由授粉家系松脂产量性状和生长性状的遗传变异分析

    Genetic variation analysis on oleoresin yield and growth traits of Pinus elliottii open-pollinated families

      摘要
    • 摘要:
      目的  生长性状、木材性状和产脂性状是广东湿地松新一轮遗传改良的目标性状。分析湿地松树高、胸径、材积、松脂质量等的表型统计量、遗传力与性状相关性，为制定多性状遗传改良策略提供理论依据。
      方法  以广东省台山市18年生的32个湿地松自由授粉家系为材料，收集24 h内胸高处的松脂样品，称质量并调查生长量。利用Asreml统计软件估算性状的遗传力和性状间的相关系数。
      结果  松脂质量(m)呈正偏态分布，其变异系数高于生长性状的变异系数，达到75.04%。转换后的松脂质量(mt)单株狭义遗传力与家系平均遗传力分别为0.216 1和0.600 5。生长性状单株狭义遗传力为0.252 7~0.415 1，家系平均遗传力为0.648 3~0.751 2。树高、胸径和单株材积之间呈极显著遗传正相关(相关系数为0.813~0.983, P＜0.001)，三者与木材密度呈显著的正相关(P＜0.05)，但标准误较大；上述性状与松脂质量的遗传相关均不显著。
      结论  在广东选择脂、材性状优良的个体，应采用家系选择与家系内单株选择的合并选择方法；在广东现有的湿地松遗传材料中，对生长量、木材密度和松脂质量做同步改良是可行的。

       

      Abstract:
      Objective  Growth property, wood property and oleoresin trait are target traits in the new round of slash pine (Pinus elliottii ) genetic improvement. The goal was to analyze phenotypic performance, heritabilities and trait correlations of tree height, diameter at breast height (DBH), individual volume and resin mass, and provide a theoretical basis for developing breeding strategies for multiple traits.
      Method  Thirty-two open-pollinated families of 18-year-old P.elliottii in Taishan City of Guangdong Province were tested. Resin samples at breast height were collected for 24 hours, the mass was determined and the amount of growth was measured. The trait heritabilities and correlations between traits were estimated using Asreml.
      Result  The resin mass (m) presented positively skewed distribution, and its coefficient of variation was higher than those of the growth traits, reaching 75.04%. The individual narrow-sense heritability and family average heritability for transformed resin mass (mt) were 0.216 1 and 0.600 5. The narrow-sense heritabilities for growth traits ranged from 0.252 7 to 0.415 1, and the family average heritabilities ranged from 0.648 3 to 0.751 2. The genetic correlations among tree height, DBH and individual tree volume were strong with the correlation coefficients from 0.813 to 0.983(P＜0.001), and their genetic correlations with wood density were medium and significantly positive(P＜0.05), while the standard errors were large. No significant correlation was found between resin mass and the above traits.
      Conclusion  To select individual performing well in oleoresin and wood properties, it is reliable to combine family selection and within-family selection. It’s possible to simultaneously improve growth, wood density and resin mass using current genetic materials of P. elliottii.

       

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