Thesis (Ph. D.)--Oregon State University, 1990. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 100-103).

Armillaria spp. are important root pathogens that cause considerable plant mortality throughout the world. The nomeclatural and taxonomic placement of the genus has been intensely debated for a long time. Early identification relied exclusively on mating tests and morphological similarities. The introduction of DNA and protein based methods has greatly increased the understanding of the phylogeny of Armillaria species. The literature surrounding Armillaria, Armillaria root disease, characters that are distinct to Armillaria, means of disease spread and techniques that have been used to identify Armillaria spp. are considered in this thesis. The controversy surrounding the proper genus name and which species should be included in the genus is also discussed. In this study a collection of isolates obtained from Zimbabwean plantations are characterized. IGS-1 sequence data and AFLP data grouped these isolates into four groups while RFLP data separated them into five groups. One group has been tentatively identified as A. fuscipes whilst the remaining ones have not been described due to scarcity of basidiocarps in the field. A broad selection of Armillaria spp. representing most of the known species were characterized using EF 1-<font face="symbol">a</font> DNA sequences and pectic enzymes. Isolates from the Southern Hemisphere were clearly separate from those originating in the Northern Hemisphere. Within these two large clades, isolates formed subclades indicating their relatedness. Both techniques confirm relationships between species reported previously using other techniques. This is however the first study that presents the molecular phylogeny of Armillaria based on a single copy protein coding gene. The identification techniques used in this study were valuable for species characterisation. Absence of fruiting bodies however, made morphological classification impossible. The results of this thesis should be useful in the process of developing future disease management strategies for Armillaria root rot in Zimbabwe. / Dissertation (MSc)--University of Pretoria, 2007. / Genetics / Unrestricted

We report here the use of RAPD-PCR (Random Amplified Polymorphic DNA - Polymerase Chain Reaction) to identify segregating loci in the haploid progeny of an Armillaria ostoyae basidiocarp and the construction of the first genetic linkage map of this fungus, one of the causal species of Armillaria Root Disease. Upon screening 75 RAPD primers, 18 were found to identify a total of 43 loci segregating with a 1 : 1 Mendelian ratio. These loci were analysed for linkage among 58 monospore progeny. The map constructed with Mapmaker (LOD = 3.0, r = 0.38) was confirmed by GMendel (LOD = 1.5, r = 0.38). This map arranged 30 loci into 6 linkage groups and 4 linkage pairs. Thirteen markers remained unlinked. Using the Kosambi mapping function the linked loci accounted for approximately 450 cM and the genome was estimated to be 1600 cM. This preliminary map covers approximately 28% of the A. ostoyae genome.

Thesis (Ph. D.)--Memorial University of Newfoundland, 1997. / Restricted until November 1998. Bibliography: leaves 189-206.

No description available.

Thesis (M.S.) University of Missouri-Columbia, 2005. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (May 18, 2007) Includes bibliographical references.

No description available.

Long-lived individuals of the opportunistic fungal pathogen Armillaria gallica arise in single mating events, and then grow vegetatively to occupy large territories including multiple woody substrates. In effect, this leaves a spatial record of mutation, the detection of which would allow new inferences about how fungal individuals grow and infect their hosts. In this thesis, I first identified a large individual of A. gallica in eastern Ontario. I then searched for genetic variation within this individual by focusing on the tandemly repeated rRNA gene cluster and four microsatellite markers that are variable in the A. gallica population. I discovered a loss of heterozygosity (LOH) in the rRNA gene-cluster region, forming two genotypes that show significant spatial clustering in a Mantel test. My M.Sc. thesis research serves as a baseline for a genome-wide study of the mutational dynamic within the vegetative growth phase of this large and old Armillaria individual.

Long-lived individuals of the opportunistic fungal pathogen Armillaria gallica arise in single mating events, and then grow vegetatively to occupy large territories including multiple woody substrates. In effect, this leaves a spatial record of mutation, the detection of which would allow new inferences about how fungal individuals grow and infect their hosts. In this thesis, I first identified a large individual of A. gallica in eastern Ontario. I then searched for genetic variation within this individual by focusing on the tandemly repeated rRNA gene cluster and four microsatellite markers that are variable in the A. gallica population. I discovered a loss of heterozygosity (LOH) in the rRNA gene-cluster region, forming two genotypes that show significant spatial clustering in a Mantel test. My M.Sc. thesis research serves as a baseline for a genome-wide study of the mutational dynamic within the vegetative growth phase of this large and old Armillaria individual.