Abstract/Details

Variabilite genetique chez Ophiostoma piceae, agent de coloration de l'aubier, au Canada

Gagne, Pierre.  Universite Laval (Canada). ProQuest Dissertations Publishing, 1999. MQ44745.

Abstract (summary)

Sapstain is defined as a blue or black discoloration of sapwood caused by penetrating fungi. These fungi do not cause decay but the timber will be downgraded, and its value will decrease. Thus, sapstain results in significant financial losses for lumber producers. Little is known about the identity, biology and ecology of the microorganisms involved in stain. In order to develop an integrated management or an environmentally benign technique against the stain, the biology of staining organisms needs to be well understood.

This study was designed to investigate the population diversity of the sapstain fungus found to be predominant in Canadian sawmills, using RAPD markers (Random Amplified Polymorphic DNA). Thus, a systematic survey was conducted at 7 selected sawmills in 6 Canadian provinces. The sampling included a wide range of important commercial wood species: balsam fir (Abies balsamea ), white spruce (Piceae glauca), black spruce ( P. mariana), Jack pine (Pinus banksiana) and lodgepole pine (P. contorta var. latifolia).

The first results confirmed that O. piceae was the most common species associated with sapstain. Analysis of RAPD markers revealed a high level of genetic variability in populations of this fungus in the six Canadians provinces. The analysis of population structure revealed that genetic diversity within populations accounted for most of the total genetic diversity. Thus, the analysis of genetic diversity of O. piceae in Canada did not reveal any clear trends in the distribution of genetic variability with regard to geographic origin or host species. (Abstract shortened by UMI.)

Indexing (details)


Subject
Molecular biology;
Ecology;
Wood;
Technology;
Plant pathology
Classification
0307: Molecular biology
0329: Ecology
0746: Wood
0746: Technology
0480: Plant pathology
Identifier / keyword
Biological sciences; ABIES BALSAMEA; AGENT; AU; AUBIER; Abies balsamea; CANADA; CHEZ; COLORATION; DE; FRENCH AND ENGLISH TEXT; French and English text; GENETIQUE; L; OPHIOSTOMA; PICEA GLAUCA; PICEA MARIANA; PICEAE; PINUS BANKSIANA; PINUS CONTORTA; Picea glauca; Picea mariana; Pinus banksiana; Pinus contorta; VARIABILITE
Title
Variabilite genetique chez Ophiostoma piceae, agent de coloration de l'aubier, au Canada
Author
Gagne, Pierre
Number of pages
62
Degree date
1999
School code
0726
Source
MAI 38/02M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
978-0-612-44745-5
Advisor
Bernier, Louis
University/institution
Universite Laval (Canada)
University location
Canada
Degree
M.Sc.
Source type
Dissertation or Thesis
Language
English, French
Document type
Dissertation/Thesis
Dissertation/thesis number
MQ44745
ProQuest document ID
304553607
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/docview/304553607/abstract