Index Catalog // ScholarsArchive@OSU

High population planting-patterns for maximum yield in field corn

Creator:: Oupadissakoon, Surapon
Abstract:: The influence of planting patterns and plant spacings on grain yield in field corn (Zea mays) was studied at the Oregon State University Botany and Plant Pathology Field Laboratory near Corvallis, Oregon in 1969. Plant characteristics and yield components studied included plant height, ear height, number of ears, ear weight...
Resource Type:: Masters Thesis
Full Text:: and yield components studied included plant height, ear height, number of ears, ear weight and

A comparison of progeny testing methods and estimates of combining ability for seed yield and associated variables in tall fescue (Festuca arundinacea, Schreb.)

Creator:: Echeverri, Silvio
Abstract:: Eight genotypes of tall fescue were selected from a plant population consisting of 9000 individuals. Selection was based on early maturity, self-sterility, seed and forage potential, and nutritive value. Parental clones, single cross, open pollinated, self pollinated and polycross seeds were organized into a randomized block experiment with five replications...
Resource Type:: Dissertation
Full Text:: Analysis of variance .for nurnber of cukns per plant in tall fescue. ZZ Mean number of culrns per plant

Responses of five genotypes of Agrostis L. to variations in environment

Creator:: Vaartnou, Herman
Abstract:: Morphological changes in five clonally propagated genotypes of Agrostis L. resulting from variations in environment were studied in six natural environments extending from southern Oregon to northern British Columbia. These same clones were also subjected to four different cutting heights in turf plots. In addition to the field experiments, they...
Resource Type:: Dissertation
Full Text:: combinations of day and night temperatures. Tiller number, plant diameter, leaf width, leaf length, aerial

The influence of plant densities on gene action estimates and associations in seven winter wheat parents and their F₂ progeny

Creator:: Saini, Surinder Kumar
Abstract:: The F₂ progeny from a diallel cross involving seven winter wheat parents along with the parents were grown at the Hyslop Agronomy Farm near Corvallis, Oregon to determine the influence of three plant densities on gene action estimates for yield and its primary components. The plant densities were designed to...
Resource Type:: Dissertation
Full Text:: observed the increase in yield was closely accompanied by an increase in number of kernels and 12

Tiller development in Dactylis Glomerata L. as influenced by nutrient supply and panicle removal

Creator:: Stobbe, Elmer Henry
Abstract:: Experiments were conducted under controlled environments to investigate the influence of nutrient supply and panicle removal on tiller and panicle production in orchardgrass. Propagules of two clones, MID-5 (Clone 0), from the synthetic variety Pennlate, and Clone B, a locally adapted clone, were utilized for these studies. Tiller production was...
Resource Type:: Dissertation
Full Text:: initiation period did not influence the number of panicles. Potassium supply during the in- ductive period

Ultrastructural study of the embryo during germination involving douglas fir (Pseudotsuga menseizii Franco) seeds

Creator:: Hsu, Kay Yong-Yong
Abstract:: The seeds of Douglas fir, a representative of the gymnosperm flora, were studied at six stages of germination to discern the structures of food reserves and to study ultrastructural changes occurring during germination in the embryo and resulting seedlings. The materials were fixed in three fixatives, dehydrated with ethanol series,...
Resource Type:: Masters Thesis
Full Text:: in size and number at a rate slower than protein bodies and were utilized completely in root tissue

Environmental and genetic factors affecting seed set in Dactylis glomerata L.

Creator:: West, David L.
Abstract:: Field, growth chamber, and greenhouse studies were carried out to evaluate factors that cause low seed set in Dactylis Glomerata L. The variety, 'Latar', and the parental clones of the variety, 'Pennlate', were studied in detail. Floral anatomy investigations indicated that 98 percent of Dactylis flowers opened at Corvallis in...
Resource Type:: Dissertation
Full Text:: indicated that this low seed set variety did not contain a large number of aneuploid plants. Evidence for

The breeding behavior of forage yield in two populations of tall fescue, (Festuca arundinacea, Schreb.)

Creator:: Matheson, Keith Isom
Abstract:: The single-cross and most F₂ progenies of 19 genotypes of tall fescue (Festuca arundinacea, Schreb. ) were used to study the breeding behavior of forage yield. Parental genotypes were selected for high self-sterility, high chromogen and high crude protein. These were studied in two groups of nine intermediate and ten...
Resource Type:: Dissertation
Full Text:: of all F2 progenies in 12 of 20 analyses in 1963, but in only 2 of 12 in 1964. The inbreeding

Studies on the methodology of crossing and selfing in Lolium multiflorum

Creator:: Bergman, Jerald Wilmer
Abstract:: Studies were conducted to determine the effectiveness of a biological pollen barrier of rye, Secale cereale, in preventing out-crossing between Lolium multiflorum genotypes in each of the 300 crossing blocks established in this experiment. Fluorescent tests of seeds of open-pollinated and single-crossed progeny of four annual ryegrass sources were used...
Resource Type:: Masters Thesis
Full Text:: -setting ability, 12 either from reduced fertility or reduced number of florets per panicle or both

Evaluation of methods for predicting yield in early generations of winter wheat crosses

Creator:: Sinha, Surendra Prasad
Resource Type:: Dissertation
Full Text:: making a large number of crosses without much regard given to specific combinations and then evaluating

ScholarsArchive@OSU

High population planting-patterns for maximum yield in field corn

A comparison of progeny testing methods and estimates of combining ability for seed yield and associated variables in tall fescue (Festuca arundinacea, Schreb.)

Responses of five genotypes of Agrostis L. to variations in environment

The influence of plant densities on gene action estimates and associations in seven winter wheat parents and their F₂ progeny

Tiller development in Dactylis Glomerata L. as influenced by nutrient supply and panicle removal

Ultrastructural study of the embryo during germination involving douglas fir (Pseudotsuga menseizii Franco) seeds

Environmental and genetic factors affecting seed set in Dactylis glomerata L.

The breeding behavior of forage yield in two populations of tall fescue, (Festuca arundinacea, Schreb.)

Studies on the methodology of crossing and selfing in Lolium multiflorum

Evaluation of methods for predicting yield in early generations of winter wheat crosses

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