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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (11): 96-103.doi: 10.11707/j.1001-7488.20141113

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Application Prospect on Applying Nondestructive Testing Technology in Wood Property Breeding of Larix kaempferi

Yi Min1, Lai Meng1, Sun Xiaomei1, Zhang Shougong1, Zhao Kun2   

  1. 1. State Key Laboratory of Tree Genetics and Breeding Research Institute of Forestry, CAF Beijing 100091;
    2. Forestry Research Institute of Luoyang, Henan Province Luoyang 471002
  • Received:2013-12-10 Revised:2014-01-18 Online:2014-11-25 Published:2014-12-04

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Abstract:

The phenotypic and genetic variation of nondestructive testing traits among 20 clones of the living trees of Larix kaempferi by using Pilodyn and microsecond timer were studied. Variant analysis revealed that the phenotypic and genetic variation coefficients for SWV(stress wave velocity) were 5.09% and 3.57%, which higher than those of Ps and Pn. The clonal repeatability for the nondestructive testing traits ranged from 0.34 to 0.48 in this study, which meant that variation in nondestructive testing traits of L. kaempferi were controlled genetically at medium level. The correlations between nondestructive testing traits and wood properties were analysed, and the results showed that there were significant negative correlations between Ps, Pn and ring density, early wood density, ring wall thickness to lumen area and early wood wall thickness to lumen area. The SWV had significant negative correlations with ring microfibrillar angle, early wood microfibrillar angle and late wood microfibrillar angle, but had significant positive correlations with ring modulus of elasticity, early wood modulus of elasticity and late wood modulus of elasticity. The results of the multiple regression analysis showed that the top two contribution rates of wood property to the Ps, Pn and SWV were ring density and early wood wall thickness to lumen area, ring density and ring wall thickness to lumen area, and early wood microfibrillar angle and ring modulus of elasticity. Linear regression equations between nondestructive testing traits and corresponding wood properties were constituted, and the results showed that the coefficient of determination of linear regression equation between Ps and ring density (0.340) was slightly smaller than those of Pn (0.360). The coefficients of determination of linear regression equations between SWV and early wood microfibrillar angle, ring modulus of elasticity were 0.348 and 0.316.

Key words: Larix kaempferi, nondestructive testing, wood property, correlation coefficient, linear regression

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