Index Catalog // ScholarsArchive@OSU

Association of selected traits with visual selection for yield in wheat (Triticum aestivum, L. em Thell.)

Creator:: Marciniak, Michael E.
Abstract:: Visual selection for grain yield may be a limiting factor in identifying superior yielding genotypes in a breeding program. This investigation was conducted (1) to compare the effectiveness of visual selection for grain yield by three selector groups representing different levels of plant breeding experience, and (2) to examine the...
Resource Type:: Masters Thesis
Full Text:: yield in wheat (Triticum aestivum, L. em Thell.) AN ABSTRACT OF THE THESIS OF Michael E. Marciniak

A comparison of three systems of phenotypic selection for grain yield in three spring barley populations

Creator:: Hayes, Patrick M.
Abstract:: Concerns regarding the most effective means of evaluating segregating generations of spring barley prompted this investigation. Three methods of selection were considered: bulk, pedigree, and single seed descent. F₆ lines derived by each method were grown in a replicated yield trial. The effectiveness of each method was measured in terms...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Warren E. Kronstad Concerns regarding the most effective means of evaluating

Inheritance of Septoria leaf blotch resistance and the possible influence of heading date and plant height on the disease expression in a winter wheat cross

Creator:: Camacho Casas, Miguel Alfonso
Abstract:: Parental lines, Fi's and segregating populations (F₂, F₃ and BC's) including reciprocals were evaluated under field conditions to determine if genetic resistance per se exists for Septoria Leaf Blotch in a selected winter wheat cross. The experiment was conducted over a three year period with both natural infection and artificial...
Resource Type:: Dissertation
Full Text:: Redacted for privacy Abstract approved:_ Warren E. Kron§'tad Parental lines, Fi's and segregating

Sampling methods and injury thresholds for western spotted cucumber beetle in snap beans

Creator:: Weinzierl, Richard Alan
Resource Type:: Dissertation
Full Text:: Entom9194y Redacted for privacy Dean of Gra to School 4 Date thesis is presented: July 12, 1984 Typed by

Management of variegated cutworm in peppermint

Creator:: Coop, Leonard Bryan
Abstract:: A pest management program for variegated cutworm (VC), Peridroma saucia (Hubner), in Oregon peppermint was developed based on studies of pheromone trapping, sampling methods, and economic thresholds. Pheromone traps effectively trapped VC males and were used to reflect development and oviposition trends. Trap height was linearly correlated to moth catch...
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy 7 Ralph E. t.96 A pest management program for variegated cutworm (VC), Peridroma

Modifying selected factors to classify levels of resistance or tolerance in wheat to Septoria Tritici Blotch

Creator:: Re, Jose Vicente
Abstract:: Influence of abiotic and biotic factors were examined in selected winter wheats previously identified as representing a range of responses to septoria infection. In the greenhouse two and three inoculations identified resistance when disease severity was assessed either for the top four leaves or the flag leaf respectively. Kernel number...
Resource Type:: Dissertation
Full Text:: privacy Head of Crop Science Department Redacted for privacy Dean of Gradu e School (f Date thesis is

Characterization of Triticum turgidum ssp. carthlicum (Nevski) Löve et Löve by discriminant analysis

Creator:: Vieira, Luiz Gonzaga E.
Abstract:: Forty-six morphological characters were used in a study of Triticum turgidum ssp. carthlicum (2n = 28) and specimens of carthlicum-like forms of Triticum aestivum ssp. vulgare (2n = 42). The morphological variation patterns within these groups were examined using stepwise discriminant analysis. These results indicate that specimens studied could be...
Resource Type:: Masters Thesis
Full Text:: ) Löve et Löve by discriminant analysis AN ABSTRACT OF THE THESIS OF Luiz Gonzaga E. Vieira for the

Inheritance of resistance to common bunt races T-23 and L-16 and association of bunt resistance with selected agronomic characters in a hybrid of Hohenheimer x Stephens wheat

Creator:: Kanbertay, Mesut
Resource Type:: Masters Thesis
Full Text:: ) Dean of Grate Schocil Date thesis is presented May 17, 1982 Typed by Kathie Miller for Mesut

Biosystematic studies of Phacelia capitata (Hydrophyllaceae), a species endemic to serpentine soils in southwestern Oregon

Creator:: Shelly, J. Stephen
Abstract:: Phacelia capitata Rruckeberg is a member of the Phacelia magellanica polyploid complex (species group Magellanicae), a group of wide-ranging, polymorphic perennials in western North America related to the South American P. secunda (= P. magellanica). The purpose of this project was to determine, to the extent possible, the interrelationships of...
Resource Type:: Masters Thesis
Full Text:: frequently associated is a Pinus ieffreyi/grass savanna. Soils from five P. capitata sites and two E

Biology of the two external Acarapis species of honey bees : Acarapis dorsalis Morgenthaler and Acarapis externus Morgenthaler (Acari: Tarsonemidae)

Creator:: Ibay, Lilia Armendez
Abstract:: The biology of the two external Acarapis mites of honey bees, Acarapis dorsalis Morgenthaler and Acarapis externus Morgenthaler was studied. It was observed that both Acarapis species have similar developmental period (8-9 days) with males emerging earlier than females. Mite load and infestation rate of A. dorsalis decreased as bees...
Resource Type:: Masters Thesis
Full Text:: Department oFritomology Redacted for privacy Dean of Graduat chool Date thesis is presented July 6, 1989

ScholarsArchive@OSU

Association of selected traits with visual selection for yield in wheat (Triticum aestivum, L. em Thell.)

A comparison of three systems of phenotypic selection for grain yield in three spring barley populations

Inheritance of Septoria leaf blotch resistance and the possible influence of heading date and plant height on the disease expression in a winter wheat cross

Sampling methods and injury thresholds for western spotted cucumber beetle in snap beans

Management of variegated cutworm in peppermint

Modifying selected factors to classify levels of resistance or tolerance in wheat to Septoria Tritici Blotch

Characterization of Triticum turgidum ssp. carthlicum (Nevski) Löve et Löve by discriminant analysis

Inheritance of resistance to common bunt races T-23 and L-16 and association of bunt resistance with selected agronomic characters in a hybrid of Hohenheimer x Stephens wheat

Biosystematic studies of Phacelia capitata (Hydrophyllaceae), a species endemic to serpentine soils in southwestern Oregon

Biology of the two external Acarapis species of honey bees : Acarapis dorsalis Morgenthaler and Acarapis externus Morgenthaler (Acari: Tarsonemidae)

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