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Scientia Silvae Sinicae ›› 2018, Vol. 54 ›› Issue (12): 82-91.doi: 10.11707/j.1001-7488.20181209

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Genetic Variation among Clones of Masson Pine (Pinus massoniana) for Growth, Oleoresin traits and Their Correlations

Yin Huanhuan1,2, Liu Qinghua1, Zhou Zhichun1, Yu Qixin3, Feng Zhongping3   

  1. 1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry Hangzhou 311400;
    2. Sichuan Agricultural University Chengdu 610000;
    3. Laoshan Forest Farm of Chun'an County of Zhejiang Province Chun'an 311700
  • Received:2018-01-24 Revised:2018-03-06 Online:2018-12-25 Published:2018-12-11

Abstract: [Objective] Pinus massoniana is a commercially important conifer for timber and oleoresin in South China. This paper studies genetic variation among origins and clones within origins and their relationship with other economic traits of P. massoniana, so as to lay a theoretical basis for breeding high-yield and high-quality P. massoniana clones.[Method] 34 years old clonal plantations of P. massoniana from different habitats were used to estimate the genetic variation among origins and clones within origins and the correlations among growth, oleoresin yield and compositions.[Result]A total of 26 chemical compositions were identified by gas chromatography-mass spectrometry analysis. The result of ANOVA revealed significant differences among origins and clones within origins for the capability of oleoresin yield and oleoresin compositions. The variation of clones within origins with the variance components ranging from 30.93% to 80.89% was the main source of genetic variation. However, the significant differences were only observed among origins for all studied growth traits except crown width with the variance components of 40.13% to 52.89%. Diameter at breast height (DBH) exhibited positive genetic correlation with the capability of oleoresin yield (rG=0.67). Among oleoresin compositions, only six compositions were moderately correlated with oleoresin yield. Strong genetic correlations were found mainly among the compositions within the same class of terpenes, especially for the sesquiterpenes. The hierarchical cluster analysis revealed monoterpenes are closely related to diterpenes, and clearly distant from sesquiterpenes. Finally,taking into account the capability of oleoresin yield,growth and oleoresin compositions,eleven high pinene and nine high abietic acid content of superior clones were selected.[Conclusion]Our results revealed that greater variation is among clones within origins for oleoresin yield and compositions, indicating the importance of within origins selection in improving oleoresin traits. DBH and six oleoresin compositions can be used to indirect selection of the capability of oleoresin yield. Strong genetic correlations existed mainly among composition within the same class of terpene. Based on growth and the capability of oleoresin yield,eleven high pinene and nine high abietic acid content of superior clones were selected.

Key words: Pinus massoniana, origins, clones, growth, oleoresin yield, oleoresin compositions, genetic variation

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