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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

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

Estimators of seed yield and its components in a plant introduction nursery of tall fescue (Festuca arundinacea Schreb.)

Creator:: Deffinbaugh, Daniel D.
Abstract:: The objective of this study was to identify visual or easily measured morphological characters associated with seed yield or its components in a spaced-plant nursery of tall fescue (Festuca arundinacea Schreb.). In 1977, 26 plant characteristics were observed on 210 plants from seven different geographic regions of origin. Each origin...
Resource Type:: Masters Thesis
Full Text:: committee members, Dr. Robert L. Powelson and Dr. Wendell H. Slabaugh. I am indebted to those who helped

Floral induction and reproductive development in selected perennial ryegrass cultivars

Creator:: Gangi, Ali Salih
Resource Type:: Masters Thesis
Full Text:: . My sincere appreciation is extended to Dr. R. V. Frakes, Dr. K. L. Chambers and Dr. S. F. Miller

Possible association between dwarfing genes Rht₁ and Rht₂ and the reaction to Septoria tritici blotch in winter wheat (Triticum aestivum L. em Thell)

Creator:: Baltazar, Baltazar
Abstract:: Four isogenic lines possessing different combinations of height reducing genes Rht₁ and Rht₂ from 'Norin 10' were crossed to a short stature, early maturing, septoria susceptible cultivar identified as the 'Tibet Dwarf'. The isogenic lines originated from the backcross population of 'Itana'/3/'Norin 10'/'Brevor 14'//6*'Itana'. Parents, F₁ and F₂ generations provided...
Resource Type:: Masters Thesis
Full Text:: my graduate study and preparation of this thesis. I further want to thank Drs. A. L. Scharen, R. G

Duration and rate of the grain filling period and subsequent grain yield in crosses between facultative and winter wheat cultivars (Triticum aestivum L. em Thell)

Creator:: Mou, Beiquan
Abstract:: Concerns about the genetic control and environmental influence of various stages of development including the grain filling period, and the relationship between early maturity and grain yield prompted this study. The experimental material consisted of two facultative and two winter wheat cultivars. A dial!el cross, excluding reciprocals, was also developed...
Resource Type:: Masters Thesis
Full Text:: graduate study and preparation of this thesis. I further want to thank Drs. W. L. McCuistion, R. G

Germination and dormancy of meadowfoam seed

Creator:: Mmolawa, Onesimus B.
Abstract:: Meadowfoam (Limnanthes spp.) is a potential oil seed crop being developed for commercial production in the Willamette Valley. The seeds are characterized by poor germination at warm temperatures. It would be desirable to overcome this temperature-related dormancy problem so that better stand establishment could be realized from early fall planting....
Resource Type:: Masters Thesis
Full Text:: with different-aged seed lots of L. alba 'Mermaid,' L. floccosa Howell and a cross of L. floccosa x L

Chemically induced pollen supression and subsequent natural outcrossing in selected wheat cultivars (Tritcum aestivum L. en Thell)

Creator:: Lewis, Hal A.
Abstract:: Effective chemical control of pollination would provide an alternative to the cytoplasmic male-sterile system in hybrid wheat (Triticum aestivum L.) production. The objective of this study was to determine concentration, formulation, growth stage of application and genotypic effects on levels of induced pollen suppression and subsequent natural out-crossing from foliar...
Resource Type:: Masters Thesis
Full Text:: . Appleby, R. J. Metzger, S. L. Broich and the staff members of the Cereal Project for their friendship

Osmotic stress vigor test for wheat seed

Creator:: Currans, Sean
Abstract:: Seed vigor tests have been developed to evaluate the relative ability of seed lots to produce stands of seedlings in the field. Some workers have suggested the possibility of differentiating vigor levels by germinating seeds under osmotic stress, but have not conducted field trials to evaluate the usefulness of the...
Resource Type:: Masters Thesis
Full Text:: signifi- cantly correlated with field emergence of artificially aged (r .85) and naturally aged seeds (r

Natural outcrossing in spaced planted F₂ populations and solid seeded advanced generations of wheat (Triticum aestivum L. em Thell)

Creator:: Boinnet, Jerry K. K.
Abstract:: This study was conducted to investigate the possible contamination of foreign pollen at different stages of a wheat breeding program. These included spaced planted F₂ segregating populations, replicated yield trials and seed multiplication. The experimental wheat materials consisted of four different F₂ populations, four cultivars and two experimental lines. Two...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

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

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

Estimators of seed yield and its components in a plant introduction nursery of tall fescue (Festuca arundinacea Schreb.)

Floral induction and reproductive development in selected perennial ryegrass cultivars

Possible association between dwarfing genes Rht₁ and Rht₂ and the reaction to Septoria tritici blotch in winter wheat (Triticum aestivum L. em Thell)

Duration and rate of the grain filling period and subsequent grain yield in crosses between facultative and winter wheat cultivars (Triticum aestivum L. em Thell)

Germination and dormancy of meadowfoam seed

Chemically induced pollen supression and subsequent natural outcrossing in selected wheat cultivars (Tritcum aestivum L. en Thell)

Osmotic stress vigor test for wheat seed

Natural outcrossing in spaced planted F₂ populations and solid seeded advanced generations of wheat (Triticum aestivum L. em Thell)

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