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Bulletin of Botanical Research ›› 2016, Vol. 36 ›› Issue (1): 62-67.doi: 10.7525/j.issn.1673-5102.2016.01.009

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Variations of Growth and Leaf Traits of Intraspecific Hybridization Clones of Populus tomentosa

LI Chun-Ming1,2;YAN Dong1;XIA Hui1;LIANG De-Yang1;SI Dong-Jing1;YIN Shao-Peng1;LIU Dian-Kun1;ZHAO Guo-Hui3;ZHAO Xi-Yang1,3*   

  1. 1.State Key Laboratory of Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040;
    2.Forestry Science Research Institute of Heilongjiang Province,Harbin 150081;
    3.Seed Orchard of Siping,Siping 136000
  • Online:2016-01-15 Published:2016-05-18

Abstract: 50 intraspecific hybridization Populus tomentosa clones including 49 offspring clones and one male parent clone in one year-old as materials, tree height(H), basal diameter(BD) and 10 leaf traits(leaf length(LL), leaf width(LW), leaf petiole(LP) et al.) were investigated. There were exist highly significant difference(P<0.01) for all the traits among different clone. The average of H, BD, LL, LF and leaf area(LA) were 64.47 cm, 7.53 mm, 9.43 cm, 8.78 cm and 60.05 cm2, respectively. Coefficients of phenotypic variation(PCV) of all the traits ranged from 2.88%(leaf basal angle, LBA) to 100.36%(leaf sharp angle, LSA), coefficients of genetic variation(GCV) were close to PCV and repeatabilities(R) ranged from 0. 851 to 0. 973. High PCV and R were beneficial for excellent clone selected. There was significant positive correlation among LL, LW, LA, H and BD(P<0.01). Regression analysis results showed that LW, LL and leaf sawtooth number(LSN) were the most important factors for influencing H and BD growth. By the comprehensive evaluation, with a selection rate of 10%, Ph 111, Ph 153, Ph 90, Ph14 and Ph 12 were selected as the excellent clones.Genetic gains from these five clones were 32.20% for tree height and 13.01% for basal diameter, respectively.

Key words: Populus tomentosa, growth, leaf traits, coefficients of variation, repeatability