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Citation:

Growth and Genetic Evaluation of 21-year-old Chinese fir Clonal Plantation

  • Received Date: 2013-07-26
  • The growth traits of 38 Chinese fir (Cunninghamia lanceolata) clones introduced from Hu'nan Province and grown in 21-year-old Chinese fir clonal plantation were surveyed and analyzed. The results of statistical analysis showed that there were significant or great significant genetic variations in height, diameter at breast height (DBH), volume, height of live branch, crown height and crown width among these clones. The repeatability of clones for height, DBH, volume, height of live branch, crown height and crown width varied between 58.65% and 87.19%, belonging to median or high genetically control level, indicating the three growth traits and three crown traits had high genetic stability. There were significant phenotypic correlations among height, DBH, volume and crown height or crown width. Three clones were selected from the 38 clones tested. The stem volumes of the three clones arrived at 0.494 8 m3, 0.438 9 m3, and 0.412 9 m3, which were 43.59%, 27.37%, and 19.82% higher than that of five controls comprised of excellent provenances, families and orchards seeds, respectively. The Chinese fir clones showed the best genetic gains and breeding prospect.
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Growth and Genetic Evaluation of 21-year-old Chinese fir Clonal Plantation

  • 1. Research Institute of Forestry, Chinese Academy of Forestry
  • 2.  Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, State Key Laboratory of Tree Genetics and Breeding, Beijing 100091, China

Abstract: The growth traits of 38 Chinese fir (Cunninghamia lanceolata) clones introduced from Hu'nan Province and grown in 21-year-old Chinese fir clonal plantation were surveyed and analyzed. The results of statistical analysis showed that there were significant or great significant genetic variations in height, diameter at breast height (DBH), volume, height of live branch, crown height and crown width among these clones. The repeatability of clones for height, DBH, volume, height of live branch, crown height and crown width varied between 58.65% and 87.19%, belonging to median or high genetically control level, indicating the three growth traits and three crown traits had high genetic stability. There were significant phenotypic correlations among height, DBH, volume and crown height or crown width. Three clones were selected from the 38 clones tested. The stem volumes of the three clones arrived at 0.494 8 m3, 0.438 9 m3, and 0.412 9 m3, which were 43.59%, 27.37%, and 19.82% higher than that of five controls comprised of excellent provenances, families and orchards seeds, respectively. The Chinese fir clones showed the best genetic gains and breeding prospect.

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