Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2004, Vol. 40 ›› Issue (6): 68-74.doi: 10.11707/j.1001-7488.20040612

Previous Articles     Next Articles

Age Trends of Genetic Parameters for Growth Traits in Short Rotation Larix kaempferi Families

Sun Xiaomei,Zhang Shougong,Hou Yimei,Li Shiyuan   

  1. Research Institute of Forestry, CAF Beijing100091;Changlinggang Forestry Farm, Jianshi County, Hubei Province Jianshi445300
  • Received:2003-08-04 Revised:1900-01-01 Online:2004-11-25 Published:2004-11-25

Abstract:

This study was carried out in a 15 years old progeny test of open pollinated families of Larix kaempferi in Jianshi County, Hubei Province. The genetic variation of families, age age correlations, and the age trends in genetic parameters for growth traits were analysed. Variance analysis revealed that DBH, height were significantly different from 5 to 15 years old among L. kaempferi families, and so were among individual trees within a family, which meant that there was big potential either for individual selection or family selection and they were the major sources for its genetic improvement. The variance components, heritabilities and coefficient of variances were dynamic during whole period of tree growth, and showed some common rules. The age age phenotypic and genetic correlations for DBH, height were very high, indicating that these relationships were mainly controlled by genetic factors. 6 year old was the most proper age for early selection of half sib families and 8 year old for individual selection within a family, and DBH was a better indicator than height due to its genetic stability.

Key words: Larix kaempferi, Family, Genetic parameters, Proper age and indicator for early selection