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Chemically induced male sterility and natural out-crossing in selected wheat cultivars (Triticum aestivum L. em Thell)

Creator:: Ekse, Ali Osman
Abstract:: Three chemicals SD 55446, SD 55447 and WL 84245 were found to induce male sterility in cultivars of wheat or triticale. Both SD 55446 and SD 55447 when applied at a concentration of 0.896 kg/ha resulted in 90% male sterility. However, SD 55447 caused female sterility at the same concentration...
Resource Type:: Masters Thesis
Full Text:: data. Thanks are extended to Dr. W. E. Kronstad, Dr. R. G. Petersen, Dr. W. L. McCuistion and Dr. R

A comparative analysis of three approaches to in-service education designed to change the behavior of classroom teachers in the social studies (K-12)

Creator:: Adams, Warren Samuel
Abstract:: The purpose of this study was to determine the effectiveness of an in-service project for teachers of the social studies (K-12). The project was sponsored by the Region II Committee of the Oregon Council for Curriculum and Instruction (O.C.C.I.) during the period from November 1, 1966 to April 1, 1969....
Resource Type:: Dissertation
Full Text:: Hall, Dr. William Crooks, Dr. Albert Lee land, Dr. Lester Beals, and Dr. R. L. Powelson for their

Time and duration of growth stages and subsequent grain yield in selected wheat cultivars (Triticum aestivum L. em Thell)

Creator:: Choi, Byung Han
Abstract:: The need to develop a shorter life cycle wheat cultivar which would be more adapted to multiple cropping systems prompted this study. Thus the following information was obtained. Greatest variations in developmental patterns were found in the stem elongation, booting, inflorescence emergence and anthesis for five winter and five spring...
Resource Type:: Masters Thesis
Full Text:: appreciation to Drs. W. L. McCuistion R. G. Petersen, R. L. Powelson, and G. Crabtree for serving on my

Combining ability and associations of agronomic traits involving three sources of dwarfism in wheat (Triticum aestivum, L. em Thell)

Creator:: Maya de Leon, Jose Luis
Abstract:: Three genetically different dwarf cultivars of spring wheat were evaluated as potential sources of short stature to use in a wheat improvement program. The study involved a five parent diallel cross which included a semidwarf, a standard height and three dwarf cultivars. The genetic sources of dwarfism included a Norma...
Resource Type:: Dissertation
Full Text:: thanks to Dr. Mary L. Powelson for her critical review of the manuscript. To all members of the cereal

A study of methods of parental evaluation using testers to predict subsequent progeny performance in winter wheat (Triticum aestivum L.)

Creator:: Alexander, William Larry
Abstract:: The major objective of this study was to determine why certain winter wheat cultivars, when hybridized, will produce a greater proportion of desirable plants in subsequent, segregating generations. Three winter wheat parents were chosen as the experimental material, based on their known performance as parents. Yamhill and Pullman Selection 101...
Resource Type:: Dissertation
Full Text:: , Dr. W. L. McCuistion, Dr. R. L. Powelson, and Dr. K E. Rowe. Special thanks are due to Dr. K. E

Genotype-environment interaction in winter wheat F₁ progeny

Creator:: Peterson, C. J.
Abstract:: Seven winter wheats were evaluated for plant height, the components of yield and yield in a diallel cross at Pendleton, Oregon and Lind, Washington. An additional parent was added to the diallel cross at Pullman, Washington. Two levels of nitrogen and five replications were utilized at each of the locations....
Resource Type:: Dissertation
Full Text:: throughout the course of the research. He is also grateful to Dr. R. J. Metzger, Dr. W. H. Foote, Dr. R. L

Modeling of dormancy and cold hardiness in red-osier dogwood (Cornus sericea L.)

Creator:: Kobayashi, Kent
Abstract:: Effects of temperature and growth stage on vegetative bud development and stem hardiness of red-osier dogwood during winter dormancy were investigated. Results were related to a degree growth stage model and were used to develop models to predict growth stages, to quantify development, and to predict hardiness. Maximum rest development...
Resource Type:: Dissertation
Full Text:: DORMANCY AND COLD HARDINESS IN RED-OSIER DOGVOOD (CORNUS SERICEA L.) Abstract approv e sz : -^r- T

Morphology, ultrastructure and mating of sporidia of a wheat-bunt fungus, Tilletia caries (DC.) Tul.

Creator:: Kollmorgen, James Frederick
Abstract:: The teliospore of Tilletia caries germinates to produce a promycelium with a whorl of primary sporidia at its tip. The time between emergence of the promycelium and the development of primary sporidia averaged 2.3 h. Fusion between compatible sporidia occurred within an additional 3.8 h. Primary sporidia appeared to be...
Resource Type:: Dissertation
Full Text:: . J. Metzger, D. I. Mills, R. L. Powelson and R. S. Quatrano. Grateful appreciation is also due to

The influence of parents, mating systems, and planting date on the transfer of gynoecious flowering to Chinese cucumbers (Cucumis sativus L.)

Creator:: Zhang, Qi (Qi Qun), 1956-
Abstract:: Gynoecious inbred lines of cucumbers (Cucumis sativus L.) with high (HF), medium (MF) and low (LF) percentage of gynoecious plants were used in crosses with monoecious Chinese cultivars with high (HN), medium (MN) and low (LN) percentage of nodes with female flowers. F₁ and F₂ progenies from these parents crossed...
Resource Type:: Masters Thesis
Full Text:: (CUCUMIS SATIVUS L.). Abstract approved: ^ ^—^ Dr. A. C. Gabert and .i<r~vw—:—-—ra

Factors associated with stand establishment and subsequent grain yield of seven wheat cultivars and selected progeny (Triticum aestivum, L em thell) when grown under three diverse environments

Creator:: Vahabian, Mohammad Ali
Resource Type:: Dissertation
Full Text:: . Thanks are extended to Dr. W. E. Kronstad, Dr. F. F. Bolton, Dr. M. L. Powelson, Dr. R. J. Metzger, Dr

ScholarsArchive@OSU

Chemically induced male sterility and natural out-crossing in selected wheat cultivars (Triticum aestivum L. em Thell)

A comparative analysis of three approaches to in-service education designed to change the behavior of classroom teachers in the social studies (K-12)

Time and duration of growth stages and subsequent grain yield in selected wheat cultivars (Triticum aestivum L. em Thell)

Combining ability and associations of agronomic traits involving three sources of dwarfism in wheat (Triticum aestivum, L. em Thell)

A study of methods of parental evaluation using testers to predict subsequent progeny performance in winter wheat (Triticum aestivum L.)

Genotype-environment interaction in winter wheat F₁ progeny

Modeling of dormancy and cold hardiness in red-osier dogwood (Cornus sericea L.)

Morphology, ultrastructure and mating of sporidia of a wheat-bunt fungus, Tilletia caries (DC.) Tul.

The influence of parents, mating systems, and planting date on the transfer of gynoecious flowering to Chinese cucumbers (Cucumis sativus L.)

Factors associated with stand establishment and subsequent grain yield of seven wheat cultivars and selected progeny (Triticum aestivum, L em thell) when grown under three diverse environments

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