Index Catalog // ScholarsArchive@OSU

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Creator:: Summers, Carly F., Gulliford, Colwyn M., Carlson, Craig H., Lillis, Jacquelyn A., Carlson, Maryn O., Cadle-Davidson, Lance, Gent, David H., and Smart, Christine D.
Abstract:: RNA sequencing (RNA-seq) and genotyping-by-sequencing (GBS) were used for single nucleotide polymorphism (SNP) identification from two economically important obligate plant pathogens, Pseudoperonospora cubensis and P. humuli. Twenty isolates of P. cubensis and 19 isolates of P. humuli were genotyped using RNA-seq and GBS. Principle components analysis (PCA) of each data...
Resource Type:: Article
Full Text:: Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Phylogenetic placement of the ectomycorrhizal genus Cenococcum in Gloniaceae (Dothideomycetes)

Creator:: Spatafora, Joseph W., Owensby, C. Alisha, Douhan, Greg W., Boehm, Eric W. A., and Schoch, Conrad L.
Abstract:: Cenococcum is a genus of ectomycorrhizal Ascomycota that has a broad host range and geographic distribution. It is not known to produce either meiotic or mitotic spores and is known to exist only in the form of hyphae, sclerotia and host-colonized ectomycorrhizal root tips. Due to its lack of sexual...
Resource Type:: Article
Full Text:: B 1 R P B 2 1- 1- 5 B ro w n s V al le y, C al if o rn ia , U SA ; Q u er cu s d ou

Effects of the Mycoparasite Sphaerellopsis filum on Overwintering Survival of Stem Rust in Perennial Ryegrass

Creator:: Gordon, T. C. and Pfender, W. F.
Abstract:: Sphaerellopsis filum is a mycoparasite of Puccinia graminis subsp. graminicola, a rust fungus that causes widespread crop damage on perennial ryegrass grown for seed. In observations taken over the winter months, S. filum was found naturally colonizing 2% of P. graminis subsp. graminicola uredinia on first-year plantings and 25% of...
Resource Type:: Article
Full Text:: ′ N, 123°20′ W). In experiment 1 (“con- trolled inoculation experiment”) plants were inoculated with P

Comments Regarding the Binary Power Law for Heterogeneity of Disease Incidence

Creator:: Turechek, W. W., Madden, L. V., and Gent, D. H.
Abstract:: The binary power law (BPL) has been successfully used to characterize heterogeneity (overdispersion or small-scale aggregation) of disease incidence for many plant pathosystems. With the BPL, the log of the observed variance is a linear function of the log of the theoretical variance for a binomial distribution over the range...
Resource Type:: Article
Full Text:: data collected by W. W. Turechek, S. Adkins, and P. D. Roberts from a 1-ha watermelon field located at

Sensitivity of Disease Management Decision Aids to Temperature Input Errors Associated with Sampling Interval and Out-of-Canopy Sensor Placement

Creator:: Pfender, W. F., Gent, D. H., and Mahaffee, W. F.
Abstract:: Many plant disease epidemic models, and the disease management decision aids developed from them, are created based on temperature or other weather conditions measured in or above the crop canopy at intervals of 15 or 30 min. Disease management decision aids, however, commonly are implemented based on hourly weather measurements...
Resource Type:: Article
Full Text:: and Out-of-Canopy Sensor Placement W. F. Pfender and D. H. Gent, United States Department of

Phytophthora borealis and Phytophthora riparia, new species in Phytophthora ITS Clade 6

Creator:: Hansen, Everett M., Reeser, Paul W., and Sutton, Wendy
Abstract:: Phytophthora borealis and Phytophthora riparia, identified in recent Phytophthora surveys of forest streams in Oregon, California and Alaska, are described as new species in Phytophthora ITS Glade 6. They are similar in growth form and morphology to P. gonapodyides and are predominately sterile. They present unique DNA sequences, however, and...
Resource Type:: Article
Full Text:: S P . bo re a li s A K W A 58 .1 -0 70 8a 05 8_ B ea rC re ek A la sk a N 63 .6 15

Hypogymnia in the Himalayas of India and Nepal

Creator:: McCune, B., Divakar, P. K., and Upreti, D. K.
Abstract:: Morphological and chemical studies of Hypogymnia from the Himalayas revealed one new species, three species new to the region, and a previously unrecognized synonym. Hypogymnia crystallina, distinguished by its rimmed holes in the lobe axils, a pruinose disc, POL+ epihymenium, and distinctive chemistry (zeorin, hypoprotocetraric acid, usnic acid and atranorin)...
Resource Type:: Article
Full Text:: of India and Nepal B. MCCUNE, P. K. DIVAKAR and D. K. UPRETI Abstract: Morphological and chemical

Pararaucaria carrii sp nov., anatomically preserved evidence for the conifer family cheirolepidiaceae in the northern hemisphere

Creator:: Stockey, Ruth A. and Rothwell, Gar W.
Abstract:: A cylindrical permineralized conifer seed cone has been identified from the Officer Member of the Trowbridge Formation, near Izee, in east-central Oregon. The cone is preserved in a Middle Jurassic (Callovian) marine calcium carbonate concretion, associated with araucarian seed cones, conifer twigs and wood, cycad seeds, fern rachides, and lycopodialean...
Resource Type:: Article
Full Text:: Hemisphere Author(s): Ruth A. Stockey and Gar W. Rothwell Source: International Journal of Plant Sciences

Evolution and Phylogeny of Gnetophytes: Evidence From the Anatomically Preserved Seed Cone Protoephedrites Eamesii gen. et sp nov. and the Seeds of Several Bennettitalean Species

Creator:: Rothwell, Gar W. and Stockey, Ruth A.
Abstract:: A fossil seed cone with characters that have been hypothesized as transitional to the origin of crown group gnetophytes has been discovered in Lower Cretaceous deposits on Vancouver Island, British Columbia, Canada. This cone, described as Protoephedrites eamesii gen. et sp. nov., provides the first anatomically preserved fossil evidence for...
Resource Type:: Article
Full Text:: te rs o f P ro to ep h ed ri te s ea m es ii ge n . et sp . n o v. as C o m p ar ed w

Characterisation of virulence reactions for Heterodera avenae populations from two localities in Algeria

Creator:: Haddadi, Fatima, Mokabli, Aissa, and Smiley, Richard W.
Abstract:: Heterodera avenae is widely distributed in areas where most cereal crops are produced in Algeria. However, the virulence of the Algerian populations of this nematode on individual cereal species and cultivars has not been well documented. The virulence of H. avenae populations from Tiaret and from Oued Smar were tested...
Resource Type:: Article
Full Text:: 1 , Aïssa MOKABLI 2 , and Richard W. SMILEY 3 1 Faculté des Sciences Biologiques

ScholarsArchive@OSU

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Phylogenetic placement of the ectomycorrhizal genus Cenococcum in Gloniaceae (Dothideomycetes)

Effects of the Mycoparasite Sphaerellopsis filum on Overwintering Survival of Stem Rust in Perennial Ryegrass

Comments Regarding the Binary Power Law for Heterogeneity of Disease Incidence

Sensitivity of Disease Management Decision Aids to Temperature Input Errors Associated with Sampling Interval and Out-of-Canopy Sensor Placement

Phytophthora borealis and Phytophthora riparia, new species in Phytophthora ITS Clade 6

Hypogymnia in the Himalayas of India and Nepal

Pararaucaria carrii sp nov., anatomically preserved evidence for the conifer family cheirolepidiaceae in the northern hemisphere

Evolution and Phylogeny of Gnetophytes: Evidence From the Anatomically Preserved Seed Cone Protoephedrites Eamesii gen. et sp nov. and the Seeds of Several Bennettitalean Species

Characterisation of virulence reactions for Heterodera avenae populations from two localities in Algeria

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