Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (9): 44-50.doi: 10.11707/j.1001-7488.20140906

Previous Articles     Next Articles

Female Selection Based on a Polycross Progeny Test of Cunninghamia lanceolata Plus Trees

Zheng Renhua1, Su Shunde1, Xiao Hui1, Xu Luping2, Li Linyuan3, Lin Wenlong2, Zhang Ziwen2, Meng Qingyin2   

  1. 1. Key Laboratory of Timber Forest Breeding and Cultivation for Mountainous Areas in Southern China of State Forestry Administration Engineering Research Center of Chinese Fir of State Forestry Administration Fujian Academy of Forestry Fuzhou 350012;
    2. Guanzhuang State-Owned Forest Farm of Fujian Shaxian 365500;
    3. Sanming Suburban State-Owned Forest Farm of Fujian Sanming 365000
  • Received:2013-11-04 Revised:2014-03-16 Online:2014-09-25 Published:2014-09-30

Abstract:

To select superior female parents, a polycross progeny test of 27-year-old Cunninghamia lanceolata plus trees was conducted to examine growth and basic wood traits including tree height, diameter at breast height(DBH), standing wood volume, and basic density of wood. The results showed that there were significant differences in growth and basic density of wood among hybridized combinations. Furthermore, DBH was the trait mostly controlled by genetic factor. The family heritability of DBH and basic density of wood was 0.325 and 0.202, respectively. Based on a selection index equation which was established with DBH and basic density of wood, 11 superior plus trees such as ‘F Sanming 74-5’, ‘F Tao 3’ and ‘F Tao 2’were identified as superior female parents. The average genetic gain of DBH and basic wood density of these superior plus was 3.19% and 1.21%, respectively. In addition, based on the contrast of selection results of DBH examined at the age of 12 and 27-year-old, selection ratio of 19% was identified as the best for growth selection in the medium term.

Key words: Cunninghamia lanceolata, plus tree, polycross, progeny test, selection, genetic gain

CLC Number: