Ten-year Height Growth of Open-pollinated Black Spruce Families in Ontario
Author: Timothy James Butler Boyle
Publisher: Chalk River, Ont. : Petawawa National Forestry Service
Published: 1986
Total Pages: 36
ISBN-13:
DOWNLOAD EBOOKResults of 10-year height growth in three series of open-pollinated progenytests of black spruce, in three site regions of northern Ontario, are presented. Estimates of narrow sense heritability from individual testsites ranged from 0 to 0.399 for single trees and from 0 to 0.896 for families, with averages of 0.169 and 0.663 respectively. Estimates frommulti-location analyses ranged from 0.099 to 0.152, with an average of0.124 for single trees, and from 0.836 to 0.930, with an average of 0.884for families. The family x environment interaction was significant in allthree series. By means of an overlapping cluster analysis method, geneticbreeding zones were delineated for each site region. Proposals are made forbreeding zones which take account of both genetic breeding zones and administrative boundaries.