JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (02): 1-7.doi: 10.3969/j.jssn.1000-2006.2011.02.001

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Characterization of growth and reproductive traits of secondgenerationparental clones of Pinus massonianaZ

HANG Yi1 , TAN Xiaomei1 , LIU Weihong2,CHU Deyu2, JIN Guoqing1, ZHOU Zhichun1   

  1. 1. Research Institute of Subtropical Forestry, CAF, Fuyang 311400, China;2. Laoshan Forest Farm of Chun′an County, Zhejiang Province, Chun′an 311700, China
  • Online:2011-04-13 Published:2011-04-13

Abstract: Major growth traits including height and DBH, and reproductive traits including number of male cones, female cones were investigated to provide insight into controlled pollination and management of seed orchard. The averaged height, DBH and volume of tested clones was 553 m,905 cm and 0021 m3, respectively. Significant differences in traits among clones and high clonal repeatability were detected. The degree of variation was higher for reproductive traits such as cones number than that for growth traits such as height and DBH. Based on major growth traits and reproductive traits, the 39 tested clones were clustered into 4 groups, which exhibited large degree of variation in traits. Group 1 exhibited superior growth traits and large amount of female cones and young cones, whereas group 2 exhibited poor growth traits and less cones number. In Group 3, the growth traits and male cones were abundant, but the female cones were poor. Group 4 exhibited poor growth traits but large amount of female cones and young cones.There was a weak and negative correlation between growth traits and female cones number, implied that multiple traits selection would be necessary in the selection of breeding parents and seed orchard parents. From 39 tested clones, 28 superior clones were selected, with the average male cone number, young cone number and volume being 182 %, 80 % and 96 % higher than the average value for the whole tested parents. The selected clones could be used for controlled pollination and seed orchard parents.

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