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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (7): 52-57.doi: 10.11707/j.1001-7488.20140708

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Phenological Variation of Larix kaempferi and Its Hybrid Clones and Early Selection

Lai Meng, Sun Xiaomei, Zhang Shougong   

  1. State Key Laboratory of Tree Genetics and Breeding Research Institute of Forestry, CAF Beijing 100091
  • Received:2013-09-13 Revised:2013-12-02 Online:2014-07-25 Published:2014-07-04
  • Contact: 孙晓梅

Abstract:

In this paper, we investigated phenological phases and measured annual growth of two-year-old seedlings of 75 Larix kaempferi and its hybrid clones after afforestation in Dagujia forest station in Qingyuan County, Liaoning Province. The results showed that the hybrid clones, derived from a cross with L. kaempferi as the female parent, behaved matroclinous inheritance in the phenological phases. Variance analysis was performed for analyzing phenological variation among L. kaempferi and its hybrid clones, principal components analysis was used for phenological type classification of L. kaempferi and its hybrid clones and correlation analysis (simple correlation analysis and canonical correlation analysis) were used to analyze relationship between growth and phenological factors. All the phenological phases were significantly different among clones. The seventy-five clones were divided into four phenological types according to the principal components analysis. There were weak negative correlations between spring phenological factors and growth. Initial apical bud formation at the later stage of growth season, apical bud fully formation, and growth period were strongly positively correlated with growth. Leaf unfolding of branches, leaf full expansion from leader bud, initial apical bud formation and apical bud fully formation could be used well to forecast the performance of volume at age 7, and these phenological factors should be considered seriously in early selection.

Key words: Larix kaempferi, hybrid clone, phenological phase, phenological type, early selection

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