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首页> 外文期刊>Silvae genetica >Genetic Variation and Correlation among Resin Yield, Growth, and Morphologic Traits of Pinus massoniana
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Genetic Variation and Correlation among Resin Yield, Growth, and Morphologic Traits of Pinus massoniana

机译：马尾松树脂产量，生长与形态性状的遗传变异及相关性

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In breeding programs, the variations and relationships among main traits need to be understood to develop selection and breeding strategies. Resin is considered as one of most important non-timber production of P. massoniana which can privides terpenes used in the chemical industry. The present study assessed the genetic variations in growth, morphologic traits, and resin yield, as well as the phenotypic and genetic correlations between these traits of 45 half-sib families of eight-year-old Pinus massoniana trees. All traits show highly significant family effects. The individual heritability for diameter at breast height (DBH) was the highest (hi2=0.55). Heritabilities for resin yield, tree height, crown depth, and the height to the live crown were slightly lower than DBH, ranging from 0.32 to 0.45. The other traits were under weak genetic control and heritabilities ranged from 0.17 to 0.20. All growth and morphologic traits were significantly correlated genetically with resin yield. Number of living branches had the highest genetic correlation with resin yield (rg=0.99), followed by DBH and number of living whorls (rg=0.73 and 0.70). Only a moderate positive genetic correlation with resin yield was found with the other traits (rg=0.47-0.57), except for height under the living branches (rg=-0.45). The results of this study indicate that both resin yield and growth can be improved simultaneously in the next generation. Of the traits assessed DBH was the optimum trait for indirectly selecting high-yielding resin trees.
机译：在育种计划中，需要了解主要性状之间的变异和关系，以制定选择和育种策略。树脂被认为是马尾松的最重要的非木材生产之一，可以使化学工业中使用的萜烯私有化。本研究评估了八岁马尾松45个半同胞家庭的生长，形态性状和树脂产量的遗传变异，以及这些性状之间的表型和遗传相关性。所有特征都显示出非常重要的家庭效应。个体在胸高（DBH）处的直径遗传力最高（h i 2 = 0.55）。树脂产量，树高，树冠深度和活树冠高度的遗传力略低于DBH，范围为0.32至0.45。其他性状在弱遗传控制下，遗传力在0.17至0.20之间。所有生长和形态性状在遗传上都与树脂产量显着相关。活枝数与树脂产量的遗传相关性最高（r g = 0.99），其次是DBH和活轮数（r g = 0.73和0.70）。除了活枝下的高度（r g =-）外，与其他性状（r g = 0.47-0.57）仅发现与树脂产量的中等正遗传相关性。 0.45）。这项研究的结果表明，下一代树脂产量和生长速度都可以同时提高。在评估的性状中，DBH是间接选择高产树脂树的最佳性状。

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