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The Legacy Of The Hawaiian Cultivator In Windward Valleys Of Hawaii. (Volumes I And Ii)., Ronald Norman Terry Jan 1988

The Legacy Of The Hawaiian Cultivator In Windward Valleys Of Hawaii. (Volumes I And Ii)., Ronald Norman Terry

LSU Historical Dissertations and Theses

The composition of a forest of relicts of cultivation in four uninhabited valleys in Kohala, Hawaii, is documented. A general hypothesis is made that arboreal distribution patterns are a function of both historical land use and ecological interaction since abandonment. The physical and historical geography of the valleys was investigated. Climate varies little, but distinct geomorphic zones offer differing biological environments. Prehistoric land use consisted of taro patches with intercropped banks. Talus slope gardens supported the Polynesian tree crops 'ohi'a 'ai (Eugenia malaccensis), kukui (Aleurites moluccana), 'ulu, (Artocarpus incisus), ti (Cordyline terminalis), and noni (Morinda citrifolia), important in today's flora. …

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Effects Of Sex And Social Influence On Perception Of Physical Effort During Light To Heavy Work By Elite Athletes., Michael Francis Sylva Jan 1988

Effects Of Sex And Social Influence On Perception Of Physical Effort During Light To Heavy Work By Elite Athletes., Michael Francis Sylva

LSU Historical Dissertations and Theses

This study was designed to investigate the effect of sex and social influence on perception of physical effort during light or heavy work by male and female athletes. Subjects performed three submaximal trials of 27 minutes each on a cycle ergometer at 25, 50 and 70% of maximum oxygen consumption in the presence of a male coactor, a female coactor, and just riding alone. The results indicated that subjects' ratings of perceived exertion (RPE) were similar when performing at all three coactor/alone conditions. No significant sex difference in RPE was found. Thus, highly trained male and female atheletes did not …

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Construct Validity Of Depression And Anxiety In Pre-Adolescents And Adolescents: A Taxometric Approach., Michael P. Carey Jan 1988

Construct Validity Of Depression And Anxiety In Pre-Adolescents And Adolescents: A Taxometric Approach., Michael P. Carey

LSU Historical Dissertations and Theses

The similarities and differences of the response classes of depression and anxiety were investigated with a sample of pre-adolescents and adolescents. The subjects were 412 pre-adolescents and adolescents from a local public school and a local psychiatric hospital. All of the participants were administered a battery of self-rating on two consecutive days. Two self-ratings of depression and two anxiety measures were utilized in order to adequately sample the content domains. Additionally, self-ratings were used to assess nine related response classes (i.e, fears, social skills, major life events, activity, hopelessness, depressed mood, anxious mood, parent-adolescent conflict, and dysfunctional thoughts). All assessment …

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Development And Design Of A Fluidized Bed/Upflow Sand Filter Configuration For Use In Recirculating Aquaculture Systems., Daniel G. Burden Jan 1988

Development And Design Of A Fluidized Bed/Upflow Sand Filter Configuration For Use In Recirculating Aquaculture Systems., Daniel G. Burden

LSU Historical Dissertations and Theses

A fluidized bed/upflow sand filter configuration, was developed and designed for utilization in recirculating aquaculture system, specifically the soft-shell crab and soft-shell crawfish industries. These filters were selected and designed because of their ability to withstand clogging and still maintain high levels of water quality for aquaculture production. The effectiveness of sand grain size was used to evaluate fluidized bed filter performance with filter loadings ranging from 16 to 1285 pounds of crawfish per cubic foot of filter sand. A coarse sand grain size was recommended as a filter media because of it's ability to shear excessive biofilm growth from …

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Semantic Encoding In Alzheimer's Disease And Multi-Infarct Dementia., Bryan Alan Bernard Jan 1988

Semantic Encoding In Alzheimer's Disease And Multi-Infarct Dementia., Bryan Alan Bernard

LSU Historical Dissertations and Theses

Episodic and semantic memory tasks were administered to patients with Alzheimer's disease (AD) and patients with multi-infarct dementia (MID). The MID group had multi-focal lesions predominantly in the subcortical regions. Episodic memory is recall of events in a particular temporal-spatial context, whereas semantic memory is "knowledge" memory regarding words and their associations. The AD and MID groups were comparable in terms of level of dementia. A control group of healthy elderly subjects was comparable to the dementia groups in regard to age and years of education. The experimental measure of semantic encoding involved presentation of six 14-word lists composed of …

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Effect Of Dietary Lipids And Cholesterol On Liver And Yolk Cholesterol Levels And Fatty Acid Composition Of Serum Cholesterol Esters In Laying Hens., Lincoln F. Berrio Jan 1988

Effect Of Dietary Lipids And Cholesterol On Liver And Yolk Cholesterol Levels And Fatty Acid Composition Of Serum Cholesterol Esters In Laying Hens., Lincoln F. Berrio

LSU Historical Dissertations and Theses

Several experiments were conducted to evaluate the influence of various lipids on laying hen cholesterol metabolism. Hens of equal age and production status were used and housed in individual cages with individual feeders. Main responses measured were yolk, liver and serum cholesterol, and fatty acid composition of serum cholesterol esters. Preliminary results showed a significant linear yolk cholesterol increase on day 9 with 0, 0.5, and 1% dietary cholesterol. Added levels of up to 4% cholesterol for 21 days failed to significantly increase further yolk cholesterol. Serum cholesterol was unaffected. In six subsequent experiments, the following lipid comparisons were made …

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Physiological And Behavioral Responses To Aerial Exposure In The Asian Clam, Corbicula Fluminea (Muller)., Roger Anthony Byrne Jan 1988

Physiological And Behavioral Responses To Aerial Exposure In The Asian Clam, Corbicula Fluminea (Muller)., Roger Anthony Byrne

LSU Historical Dissertations and Theses

Aerially exposed, bivalve molluscs face opposing problems of preventing water loss, and maintaining metabolism. Because of the unpredictability of emersion duration, most freshwater bivalve families are capable of extensive emersion tolerance. Corbicula fluminea (Muller) is a relatively recent invader of freshwater and shares many physiological features with its estuarine ancestors. It might be expected to be intermediate in its emersion responses between those of more ancient freshwater forms, and those of estuarine clams. In air, C. fluminea displayed ventilatory behaviors which were associated with high rates of aerial O$\sb2$ uptake and CO$\sb2$ release. Normoxically exposed clams had bursts of heat …

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The Effects Of Temperature Stress On The Bovine Pituitary-Adrenal-Ovarian Axis: An In-Vitro Study., Terry Davis Jan 1988

The Effects Of Temperature Stress On The Bovine Pituitary-Adrenal-Ovarian Axis: An In-Vitro Study., Terry Davis

LSU Historical Dissertations and Theses

The effect of temperature stress on profiles of LH and FSH from pituitary cells; aldosterone, progesterone, cortisol and corticosterone from adrenocortical cells; and estradiol and progesterone from granulosa cells were evaluated using bovine anterior pituitary, adrenocortical and granulosa cells in primary cultures. Cells were grown to confluency in a 37$\sp\circ$C humidified incubator containing 95% O$\sb2$ and 5% CO$\sb2$. Upon reaching confluency, half of the wells were assigned to 40$\sp\circ$C incubation temperature while the other half remained at 37$\sp\circ$C. The 37$\sp\circ$C temperature represented control conditions whereas 40$\sp\circ$C represented heat stress. Various biological substances, that have been reported to alter hormone production, …

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Dna Methylation, Chromatin Structure And Expression Of Maize Ribosomal Rna Genes., Eldon Ralph Jupe Jan 1988

Dna Methylation, Chromatin Structure And Expression Of Maize Ribosomal Rna Genes., Eldon Ralph Jupe

LSU Historical Dissertations and Theses

The restriction endonuclease HpaII was utilized to examine ribosomal RNA gene (rDNA) methylation in maize and teosinte leaf DNA. Much of the rDNA was inaccessible to HpaII cleavage indicating that these repeat units were completely methylated. In all of the DNAs examined, a significant fraction (10-25%) of the rDNA was cleaved at least once by HpaII into repeat unit length (9.1 kbp) fragments. The undermethylated HpaII sites mapped to the intergenic spacer (IGS) region of the rDNA. The major site of undermethylation was located in a region near the transcriptional start site. An EcoRI polymorphism, present in the 26S gene …

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The Genetic Variance-Covariance Structure Of The Louisiana Sugarcane Breeding Population., Scott Bradly Milligan Jan 1988

The Genetic Variance-Covariance Structure Of The Louisiana Sugarcane Breeding Population., Scott Bradly Milligan

LSU Historical Dissertations and Theses

Genetic variances estimates were obtained for ten traits of the Louisiana sugarcane breeding population. The variances and resulting statistics were derived from a population of three offspring each from 40 biparental crosses of 28 elite parents. The offspring and their parents were grown in replicated tests in five environments (year-location combinations). Narrow and broad-sense heritabilities, genetic correlations, genetic coefficients of variation and genetic gain estimates were estimated. To represent clonal populations in different stages of selection, the population was divided into three subpopulations: offspring, noncommercial parents and commercial parents. For each subpopulation, the genotype x environment (GE) variation was partitioned …

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Biochemical And Physiological Mechanisms Involved In Insecticide Toxicity And Host Plant Resistance To The Soybean Looper, Pseudoplusia Includens (Walker)., Randy Lynn Rose Jan 1988

Biochemical And Physiological Mechanisms Involved In Insecticide Toxicity And Host Plant Resistance To The Soybean Looper, Pseudoplusia Includens (Walker)., Randy Lynn Rose

LSU Historical Dissertations and Theses

Permethrin, fenvalerate, methomyl, acephate and methyl parathion were bioassayed on larvae of the soybean looper, Pseudoplusia includens (Walker) and the velvetbean caterpillar, Anticarsia gemmatalis (Hubner) fed on susceptible (Bragg) versus resistant (PI 227687) soybean, Glycine max (L.) Merr., cultivars. Soybean loopers reared on resistant leaves were significantly more susceptible to acephate (2-fold) than when reared on susceptible leaves. Velvetbean caterpillars fed resistant leaves were more susceptible to both fenvalerate (1.5-fold) and acephate (1.6-fold) than when fed susceptible leaves. Differences in toxicity of other insecticides due to host plant were not observed. Midgut homogenates from last instar soybean loopers reared on …

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The Dextranase Of Lipomyces Starkeyi And Its Use In Sugar Cane Processing., David William Koenig Jan 1988

The Dextranase Of Lipomyces Starkeyi And Its Use In Sugar Cane Processing., David William Koenig

LSU Historical Dissertations and Theses

Dextranase is an enzyme which destroys dextran, a contaminant in sugar and a main constituent of dental plaque. Dextranase utilization can solve a major economic problem in the sugar industry, and in dental preparations it can keep teeth essentially free of plaque. The dextranase from the yeast Lipomyces starkeyi was investigated because this organism has been used in food related processes. This attribute should allow for Food and Drug Administration (FDA) approval for use of a Lipomyces dextranase. None of the existing commercial dextranase preparations have FDA approval. L. starkeyi was found to produce maximum amounts of dextranase when grown …

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Soil Sorption And Plant Uptake Of 2,4,6-Trinitrotoluene., Judith Carol Pennington Jan 1988

Soil Sorption And Plant Uptake Of 2,4,6-Trinitrotoluene., Judith Carol Pennington

LSU Historical Dissertations and Theses

Potential environmental hazards are posed by the presence of 2,4,6-Trinitrotoluene (TNT) contamination in soils of US Army Ammunition Plants (AAPs). Adsorption and desorption studies were conducted on soil samples collected from 13 AAPs. Soils were found to be primarily silt loams, low in organic carbon. TNT reached a steady state of adsorption with test soils within 2 hrs of contact. Desorption also reached steady state within 2 hrs with more than half of the adsorbed TNT being removed. Batch adsorption isotherms were best fit by the Langmuir adsorption model. Average adsorption coefficients (soil concentration to solution concentration), or K$\sb{\rm d}$, …

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Neural Networks With Asynchronous Control., Michael Christopher Stinson Jan 1988

Neural Networks With Asynchronous Control., Michael Christopher Stinson

LSU Historical Dissertations and Theses

Neural network studies have previously focused on monolithic structures. The brain has a bicameral nature, however, and so it is natural to expect that bicameral structures will perform better. This dissertation offers an approach to the development of such bicameral structures. The companion neural structure takes advantage of the global and subset characteristics of the stored memories. Specifically we propose the use of an asynchronous controller C that implies the following update of a probe vector x by the connection matrix T: $x\sp\prime$ = sgn (C(x, TX)). For a VLSI-implemented neural network the controller block can be easily placed in …

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The Relationship Between Root Anatomic And Metabolic Responses To Soil Waterlogging In The Coastal Grass Spartina Patens., David Maaloe Burdick Jan 1988

The Relationship Between Root Anatomic And Metabolic Responses To Soil Waterlogging In The Coastal Grass Spartina Patens., David Maaloe Burdick

LSU Historical Dissertations and Theses

Spartina patens is a perennial grass that dominates dune, swale and marsh habitats in coastal Louisiana. Plant roots require oxygen for respiration and normal root function, and one of the most serious problems wetland plants encounter is the development of anaerobic conditions in the soil. The remarkable success of S. patens in habitats that occupy distant positions on a soil waterlogging gradient suggests either genetic differentiation or phenotypic adaptation among these populations. Field and greenhouse investigations were conducted to: (1) identify anatomic and metabolic soil waterlogging responses in Spartina patens, (2) examine the relationship between these responses, and finally (3) …

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An Initial Identification Of Parasite Specific Immune Responses In The Jird (Meriones Unguiculatus) Infected With Brugia Pahangi., Rita Gaskin Farrar Jan 1988

An Initial Identification Of Parasite Specific Immune Responses In The Jird (Meriones Unguiculatus) Infected With Brugia Pahangi., Rita Gaskin Farrar

LSU Historical Dissertations and Theses

Brugia pahangi infections in the jird (Meriones unguiculatus) is an accepted experimental model for the study of human lymphatic filariasis. Initial identification of parasite specific immune responses in jirds infected with B. pahangi are reported here. Antibody reactivity in sera from singly and multiply infected jirds against different stages of B. pahangi was determined using an indirect fluorescent antibody technique. All life cycle stages of the parasite were examined. Antibodies recognizing all stages were present in all serum samples. Removal of antibody reactivity by absorption of jird sera with B. pahangi antigen coated beads indicated that the antibodies were parasite …

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An Investigation Of The Fungus, Balansia Cyperi Edg., And Its Effect On Purple Nutsedge, Cyperus Rotundus L., Mary Elizabeth Stovall Jan 1988

An Investigation Of The Fungus, Balansia Cyperi Edg., And Its Effect On Purple Nutsedge, Cyperus Rotundus L., Mary Elizabeth Stovall

LSU Historical Dissertations and Theses

This study was designed to investigate host specificity of the fungus Balansia cyperi Edg. on Cyperus rotundus L. (purple nutsedge) and to determine the effect of fungus presence on the biology and ecology of the sedge. Isolates of epiphytic Balansias from C. rotundus and C. virens had similar cultural characters, conidium morphology, and extracellular enzyme activity in artificial culture. However, B. cyperi from C. rotundus had a faster growth rate, greater conidium production, and higher temperature optimum than did the isolate from C. virens. Artificial infection of C. rotundus by B. cyperi from C. rotundus was far more successful than …

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Amino Acid Responses Of Olfactory Bulb Cells In The Channel Catfish., Hilary Winfield Thompson Jan 1988

Amino Acid Responses Of Olfactory Bulb Cells In The Channel Catfish., Hilary Winfield Thompson

LSU Historical Dissertations and Theses

Amino acid (AA) responses of olfactory bulb (OB) mitral cells (MC) in the catfish, Ictalurus punctatus, were studied electrophysiologically. A total of 63 cells were recorded in 28 fish in two separate experiments. For the first study, 27 cells in 22 fish were studied with olfactory tract (OT) intact during stimulation with 10$\sp{-6}$ M to 10$\sp{-2}$ M concentrations of 11 AA. MC responses were quantified by interspike interval (ISI) variables sensitive to inhibition (maximum ISI) and excitation (number of action potentials (AP), minimum ISI). APs were also counted in subdivisions to produce a measure sensitive to MC response temporal patterning. …

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Estimation Of Additive And Nonadditive Direct And Maternal Genetic Effects For Reproductive Traits In Beef Cattle., Allen Richard Williams Jan 1988

Estimation Of Additive And Nonadditive Direct And Maternal Genetic Effects For Reproductive Traits In Beef Cattle., Allen Richard Williams

LSU Historical Dissertations and Theses

A total of 4,301 cow exposure records from a four generation rotational crossbreeding study were used to calculate least squares means and heterosis estimates and partition breed and heterotic genetic effects for calving rate (CR), calf survival (CS), weaning rate (WR), calf birth date (CBD) and percent assisted births (PA). Angus (A), Brahman (B), Charolais (C) and Hereford (H) breeds were involved in two-, three- and four-breed rotation systems with the restriction that each breed combination include B. Straightbreds were maintained as controls. Generation, year within generation, breed group of dam within generation and the linear and quadratic effects of …

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Analytical-Toxicological Studies Of Environmental Importance., Hessam Ghane Jan 1988

Analytical-Toxicological Studies Of Environmental Importance., Hessam Ghane

LSU Historical Dissertations and Theses

Part One. Acidity and chemical composition of precipitation in Baton Rouge, Louisiana; The synergistic effects of acidity and aluminum on fish. Acid precipitation which consists of both wet precipitation and dry deposition has recently become a significant environmental problem. It has been shown that the effects of acid rain are deleterious to soil, vegetation, aquatic life and buildings. Wet-precipitation-only samplers were used to collect acid rainfalls in the vicinity of Louisiana State University, Baton Rouge and subjected to appropriate chemical analysis for the purpose of characterization of general composition and acidity. About 50% of precipitation is within pH range of …

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Characterization Of The Cellular Immune Defect In Chronic Bovine Paratuberculosis., John Michael Kreeger Jan 1988

Characterization Of The Cellular Immune Defect In Chronic Bovine Paratuberculosis., John Michael Kreeger

LSU Historical Dissertations and Theses

Cattle, naturally infected with Mycobacterium paratuberculosis, were evaluated with respect to immune status. Their ability to express cell mediated immune responses to homologous and heterologous antigens was also evaluated. Lymphocyte and macrophage augmentation was attempted to localize the immune defect in cattle with paratuberculosis. Infected cattle had varying responses to johnin skin test antigen. Lymphocyte blastogenic responses and migration inhibition were, however, consistently positive in infected cattle. Non-infected cattle had positive skin test reactions, blastogenic responses, and migration inhibition after sensitization with M. bovis BCG, M. paratuberculosis, and keyhole limpet hemocyanin. No changes were seen in lymphocyte blastogenic response, migration …

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Response Of Soybean Growth And Dinitrogen-Fixing Ability To Insect-Induced Defoliation., Maurice Blake Layton Jr Jan 1988

Response Of Soybean Growth And Dinitrogen-Fixing Ability To Insect-Induced Defoliation., Maurice Blake Layton Jr

LSU Historical Dissertations and Theses

A series of greenhouse experiments was conducted to investigate the effects of insect-induced defoliation on growth and N$\sb2$-fixing ability of soybean. This research had three major objectives: (1) to examine the effects of different levels of defoliation, (2) to determine the impact of progressive defoliation, and (3) to study the ability of soybeans to recover following defoliation. All experiments were conducted in a similar manner. Larvae of the soybean looper, Pseudoplusia includens (Walker), were used to defoliate soybeans in the vegetative stage of development and the acetylene-ethylene reduction assay was used to provide an indirect measure of N$\sb2$-fixing ability of …

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Compatibility Of Biological Control With Host Plant Resistance And Insecticidal Control In Soybeans., David Boyd Orr Jan 1988

Compatibility Of Biological Control With Host Plant Resistance And Insecticidal Control In Soybeans., David Boyd Orr

LSU Historical Dissertations and Theses

Studies were conducted to investigate the influence of both plant resistance and insecticidal controls used in soybean on several natural enemies of pest insects. There were two major objectives to this research: (1) to examine the effects of an insect herbivore-resistant soybean genotype on relationships between four levels of a trophic system; (2) to determine the influence of the primary insecticides applied to control Louisiana soybean insect pests on survival of a major biological control agent of stink bugs. In the first study, pre-imaginal development of the predatory pentatomid, Podisus maculiventris (Say), was affected by soybean antibiosis in a manner …

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New Female Playwrights In The American Theatre, 1973-1983: A Critical Analysis Of Thought In Selected Plays., Joyce Williams O'Rourke Jan 1988

New Female Playwrights In The American Theatre, 1973-1983: A Critical Analysis Of Thought In Selected Plays., Joyce Williams O'Rourke

LSU Historical Dissertations and Theses

Historically, the female playwright has been plagued by a lack of visibility. Long hindered by a limited number of women writers as role models, by the few receptive stages on which to mount their works, and by a public accustomed to a male dominated stage practice, female playwrights nevertheless in the last two decades have produced an extraordinary body of work, signifying a new thrust in the American theatre. Ten playwrights have been selected as representatives of this movement: Tina Howe, Rosalyn Drexler, Rose Goldemberg, Mary Gallagher, Adele Shank, Lavonne Mueller, Wendy Wasserstein, Ntozake Shange, Beth Henley and Marsha Norman. …

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Ultrastructural Studies Of Cell Membrane-Associated Events In Early And Late Stages Of Bovine Coronavirus Replication., Harold Ross Payne Jan 1988

Ultrastructural Studies Of Cell Membrane-Associated Events In Early And Late Stages Of Bovine Coronavirus Replication., Harold Ross Payne

LSU Historical Dissertations and Theses

The early events in the infection of human rectal tumor cells by bovine coronavirus were investigated by immunoelectron microscopy and by studies with lysosomotropic weak bases. Virus particles labeled with colloidal gold were endocytosed by synchronously infected cells and accumulated in vacuoles that resembled secondary lysosomes. Sites of fusion between the virus envelope and the plasmalemma were observed but fusion events along intracellular membranes were not found. Exposure of cells to ammonium chloride or to mythylamine during the first hour of infection had little inhibitory effect on the production of infectious virus. Chloroquine treatments were inhibitory but this effect was …

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Plant Protein Improvement By Genetic Engineering: Use Of Synthetic Genes., Moon Sik Yang Jan 1988

Plant Protein Improvement By Genetic Engineering: Use Of Synthetic Genes., Moon Sik Yang

LSU Historical Dissertations and Theses

The essential amino acid composition of plant foodstuffs is very important, especially in the developing countries where people very heavily depend on plant proteins from a single source. In these situations, it would be highly beneficial to 'engineer' the plant to produce proteins with a balanced essential amino acid content. Recombinant DNA technology and Agrobacterium-based vector systems offer a novel approach to modify plant proteins. Several attempts with some encouraging results have been made to express plant storage protein genes in transgenic plants. However, improvement of the quality of plant protein using these techniques is in an early stage. In …

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Free Radical Production From Criegee Ozonides., James Conrad Ewing Jan 1988

Free Radical Production From Criegee Ozonides., James Conrad Ewing

LSU Historical Dissertations and Theses

Allylbenzene ozonide (ABO), a model for poly-unsaturated fatty acid (PUFA) ozonides, is shown to initiate the autoxidation of methyl linoleate (18:2ME) at 37$\sp\circ$C under 760 torr of oxygen. This process is inhibited by d-alpha-tocopherol ($\alpha$-T) and 2,6-di-tert-butyl-4-methylphenol (BHT). Rates of initiated autoxidation were measured by appearance of conjugated diene (C.D.) and oxygen-uptake experiments; rates are proportional to the square root of ABO concentration, implying that the usual free radical autoxidation rate law is obeyed. Activation parameters for the thermal decomposition of ABO were determined under N$\sb2$ in the presence of radical scavengers and found to be E$\sb{\rm a}$ = 28.2 …

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Dynamic Headspace Sampling And Chromatographic And Mass Spectrometric Investigations Of Volatile Flavor Components In Red Swamp Crayfish (Procambarus Clarkii) Hepatopancreatic Tissue., Stephen S. Williams Jan 1988

Dynamic Headspace Sampling And Chromatographic And Mass Spectrometric Investigations Of Volatile Flavor Components In Red Swamp Crayfish (Procambarus Clarkii) Hepatopancreatic Tissue., Stephen S. Williams

LSU Historical Dissertations and Theses

This analytical food flavor study concentrated on the development and application of improved analytical techniques to investigate volatile flavor components in crayfish (Procambarus clarkii) hepatopancreatic tissue. This work consisted of four main parts. The first part dealt with the development of an improved dynamic headspace sampling procedure for the sampling and concentration of volatile flavor components in the headspace of high moisture foods. The second section described the successful application of this improved procedure for chromatographic and mass spectrometric investigation of dynamic headspace volatile flavor components of crayfish hepatopancreatic tissue. The third part discussed the quantitative determination of these volatile …

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Molecular Analysis Of Mutant And Wild Type Alcohol Dehydrogenase Alleles From Drosophila., Mark Andrew Batzer Jan 1988

Molecular Analysis Of Mutant And Wild Type Alcohol Dehydrogenase Alleles From Drosophila., Mark Andrew Batzer

LSU Historical Dissertations and Theses

Wild type alcohol dehydrogenase polypeptides (ADH) from Drosophila melanogaster transformants were examined using western blots and polyclonal antiserum specific for Drosophila melanogaster ADH. These data indicate that ADH from Hawaiian drosophilids was similar in molecular weight to Drosophila melanogaster ADH, but that the isoelectric points of the Hawaiian electromorphs were distinct. Therefore it was evident that western blots could be used to characterize ADH from different species of Drosophila. Mutants induced in Drosophila spermatozoa at the alcohol dehydrogenase (Adh) locus using X-rays, 1-ethyl-1-nitrosourea (ENU) or ethyl methanesulfonate (EMS) were characterized using genetic complementation tests, western blots, Southern blots, northern blots …

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Path-Coefficient Analysis: A Study Of Phenotypic, Broad-Sense And Narrow-Sense Variation In Sugarcane., Kenneth Albert Gravois Jan 1988

Path-Coefficient Analysis: A Study Of Phenotypic, Broad-Sense And Narrow-Sense Variation In Sugarcane., Kenneth Albert Gravois

LSU Historical Dissertations and Theses

The variance-covariance structure of a Louisiana sugarcane (Sacchum spp.) population was estimated and used to calculate correlation coefficients (phenotypic, broad-sense genotypic and additive genetic), narrow-sense heritability and measures of additive genetic variation and gain under selection. Four progeny from each of 20 crosses were grown in plantcane, first ratoon and second ratoon crops at the St. Gabriel Research Station of the Louisiana Agricultural Experiment Station. Broad-sense genotypic and phenotypic correlations were calculated and subjected to path-coefficient analysis to study direct and indirect effects in a set of cause and effect relationships involving sucrose yield. Broad-sense genotypic relationships are useful to …

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