Range Wide Provenance Tests of Black Spruce in Ontario
Range Wide Provenance Tests of Black Spruce in Ontario

Author: Timothy James Butler Boyle

Publisher: Chalk River, Ont. : Petawawa National Forestry Institute

Published: 1985

Total Pages: 44

ISBN-13:

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Results are presented for height growth and survival at 10 and 15years from seed for 76 provenances of black spruce planted atfive test sites in Ontario. The best provenance overall was fromNipissing, Ont., but several western Ontario and Quebec sourcesalso performed well. Based on these results, it is suggestedthat early selection is not effective in black spruce, that localand regional sources are not necessarily superior to distantsources, but that specific provenances can be selected at age 15for use in improvement programmes.

Geographic Variation in Forest Trees
Geographic Variation in Forest Trees

Author: Maria Morgenstern

Publisher: UBC Press

Published: 2011-11-01

Total Pages: 224

ISBN-13: 077484177X

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Geographic Variation in Forest Trees is the first book to examine this subject from a world-wide perspective. The author discusses population genetic theory and genetic systems of native North American tree species as they interact with environments in the major climatic regions in the world. He then demonstrates how this knowledge is used to guide seed zoning and seed transfer in silviculture, basing much of his discussion on models developed in Scandinavia and North America. In the final chapter, the author addresses the issue of genetic conservation -- a subject of great concern in the face of accelerated forest destruction, industrial pollution, and climatic change. This comprehensive, well-researched book makes a significant contribution to the knowledge of one of our most important renewable natural resources.

Ten-year Height Growth of Open-pollinated Black Spruce Families in Ontario
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:

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Results 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.

A Silvicultural Guide for the Spruce Working Group in Ontario
A Silvicultural Guide for the Spruce Working Group in Ontario

Author: R. W. Arnup

Publisher:

Published: 1988

Total Pages: 116

ISBN-13:

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"The main purposes of this guide are : to summarize the knowledge of the silvics of spruce; to desctibe the current timber management practices for spruce in Ontario; to identify key factors that the manager must consider during the development of the Timber Management Plan and site specific prescriptions; and provide a basis for subsequnt development in both knowledge and practice. ... The principles outlined herein may be applied elswehere."--Page 1