Genetic diversity of black spruce populations regenerated after fire or after harvesting with pre-established regeneration protectionReportar como inadecuado




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Growth, Black spruce, Regeneration, Sustainable forestry

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Subject-Keyword: Growth Black spruce Regeneration Sustainable forestry

Type of item: Report

Language: English

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Time:

Description: Project Report 1999-27

Date created: 1999

DOI: doi:10.7939-R3TH8BQ7F

License information: Creative Commons Attribution-Non-Commercial 3.0 Unported

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Autor: Bousquet, Jean Perry, Daniel J.

Fuente: https://era.library.ualberta.ca/


Introducción



PROJECT REPORT 1999-27 Genetic diversity of black spruce populations regenerated after fire or harvesting with pre-established regernation protection Jean Bousquet and Daniel J.
Perry For copies of this or other SFM publications contact: Sustainable Forest Management Network G208 Biological Sciences Building University of Alberta Edmonton, Alberta, T6G 2E9 Ph: (780) 492 6659 Fax: (780) 492 8160 http:--www.biology.ualberta.ca-sfm- ISBN 1-55261-042-X Genetic diversity of black spruce populations regenerated after fire or after harvesting with pre-established regeneration protection by Jean Bousquet and Daniel J.
Perry Sustainable Forest Management Network Centre de recherche en biologie forestière Université Laval, Ste.-Foy, Québec July 1999 EXECUTIVE SUMMARY Black spruce (Piceamariana [Mill.] B.S.P.) regenerates under two different regimes 1) by seed, given adequate seed bed conditions, e.g.
post-fire conditions; and 2) by layering, e.g. populations where harvest with protection of pre-established natural regeneration is practiced and where accumulation of organic matter prevents seed germination and seedling establishment. Although the growth of black spruce stands from layering is comparable to that of stands from seeds, questions have been raised about the long-term effects of management regimes favouring layering and clonal structures.
The objectives of this project are: 1) to evaluate the genetic diversity and the level of inbreeding of black spruce populations regenerated by layering after harvest; and 2) to compare these parameters with those of populations regenerated naturally by seed after fire.
A set of 12 polymorphic codominant molecular markers have been developed and applied to evaluate the genetic diversity in seven mature populations of black spruce from both types of origin.
At the scale of analysis, the results show that the genetic diversity of black spruce populations is essentially the same whether stand origin is from fire or from...





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