Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Genetic lines"”.
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Physiological and behavioral responses of genetic lines of chickens to physical and auditory stimuli
… traits of White Leghorn cockerels from lines selected for high and low antibody response to sheep red blood cell antigen were measured to 70 days of age in several husbandry settings. Chicks were reared in pens with wood shavings, in windowless rooms, with continuous light and feed and …
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In vitro milk protein secretion by explants of Holstein bull mammary tissue from two different genetic lines
… proteins was studied. Sixteen bulls from the genetic selection and control lines developed at Virginia Polyteclmic Institute were randomly assigned to either a non-treated or steroid pretreated group. The steroid pretreated group received estradiol 17-B and progesterone at 0.1 and 0.25 …
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Reproductive traits, identity and host preferences of two genetic lines of the seedcorn maggot, Delia platura (Diptera : Anthomyiidae)
… the seedcorn maggot, Delia platura. However, two genetic lines (the H- and N- lines) have recently been discovered within D. platura. These lines differ in distribution patterns with the only region of overlap being in eastern Canada. Additionally, field data suggest differences in phenological …
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Identification Of A Treatment-Resistant, Ketamine-Sensitive Genetic Line In The Chick Anxiety-Depression Model
… and one novel antidepressant in two genetic lines of domestic fowl chicks that have previously been identified as stress-vulnerable and stress-resilient in the chick anxiety depression model. Separate groups of socially raised Black Australorp (stress-vulnerable) and Production Red …
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Dietary long-chain polyunsaturated fatty acids affect plasma and tissue lipids in chickens
… the third experiment, female chickens from two genetic lines, high body weight (HW) and low body weight (LW), were fed SBO (rich in n-6 polyunsaturates) or MO (rich in n-3 polyunsaturates). The amounts of triacylglycerols in the plasma VLDL + LDL fractions were elevated in the LW chickens …
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Bacterial profiles and ex vivo effects of Salmonella Heidelberg on leukocyte function in turkey purebred lines
… increased attention, is selection to improve genetic resistance. This study evaluated the effects of an oral Salmonella Heidelberg (SH) challenge on bacterial colonization, and the ex vivo effects of SH on phagocytic and bactericidal leukocyte function in turkeys from six pedigree lines (A-F). …
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Immunological Response to Clostridium perfringens in Two Genetically Divergent Lines of Chickens as Influenced by Major Histocompatibility Complex (MHC) Genotype
Chickens genetically selected for low (LA) or high (HA) antibody response to sheep red blood cells (SRBC) displayed a correlated change in major histocompatibility complex (MHC), so that LA chickens were 96% B¹³ and HA chickens were 96% B²¹. During a clinical outbreak of necrotic enteritis, B²¹B²¹ …
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Molekulinė naminių pelėdų (Strix aluco) hemosporidinių parazitų diagnostika /
… were infected with haemosporidian parasites. The genetic lines hCULKIB01 and hSTAL2 of the Haemoproteus syrnii parasite were found and identified in domestic owls. Nine samples showed mixed infections, which prevented identification of the parasites.
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Derepression of heterochromatin inactivation by induction of a nearby promoter in Drosophila melanogaster
… phenomenon by classically constructing several genetic lines, which were either capable or incapable of initiating a heat shock response, but otherwise genetically identical. These lines were reared in both heat shock and non-heat shock conditions and then variegation was assessed by the amount …
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Androgen aromatization and cytosol estradiol-receptors in the mediation of masculine sexual behavior in Japanese quail
… differed upon comparison of the two genetic lines. Of all ³H-testosterone metabolite radioactivity, ³H-estradiol represented 45 ± 6% in the HM line and 46 ± 6% in the LM line, indicating that the line difference in mating frequency was not due to a corresponding difference in …
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The avian maternal environment: Its influence on the physiological mechanisms contributing to progeny production efficiency in chicken meat birds
… and whether phenotypes were consistent between genetic lines of chicken meat birds. Breeder hens from two genetic lines, a high performing line, and an underperforming line, were fed either a control or saccharomyces cerevisiae (SC) supplemented diet from 23 weeks of age. Eggs were collected …
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Genetics, humoral immunoresponsiveness, and disease resistance in chickens
Lines of White Leghorn chickens selected > 20 generations for (HA) and against (LA) antibody response to SRBC injected i.v. from 41 to 51 days of age, are now known to have diverged in primary antibody response to SRBC. Experiments described in this dissertation were designed to further evaluate …
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HONEY BEES, BIODIVERSITY AND CLIMATE CHANGE
… habitat loss, pathogens, climate change, and the genetic risks associated with selective breeding. This thesis explores the genetic and microbial dimensions of honey bee health and productivity within a closed breeding population selected since 2015 for docility, hygienic behavior, and honey …
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Effects of restricted feeding schedule during development and gestation on gilt and sow performance
… that was used for lean gain was similar for both genetic lines at approximately 20 g of Lys for each kg of gain.
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The effects of individual-level differences in metabolic rate on foraging behavior and life history traits in honeybees
… rates differ in efficiency maximization, using genetic lines of honeybees with different metabolic rates. Our results show that low metabolic rate foragers visit more flowers during a single foraging trip and have higher energetic efficiency than high metabolic rate foragers in both low and high …
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Impact of genetics and phosphorous nutrition on bone metabolism
… however, little research has focused on the genetic mechanisms controlling P utilization. Thirty-six pigs from 2 sire lines known to differ in bone structure (heavier-boned, HB, and lighter-boned, LB) were assigned to three diets for 2 weeks (P adequate, P repletion, or P deficient). In HB, …
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Comparative single-cell transcriptomics of complete insect nervous systems
… profiling hundreds of thousands of single cells. Genetic lines exist in the larva for selective manipulation of most neurons. Electron microscopy reconstruction of the larval nervous system is close to complete. Lastly, the larva has a rich behavioural repertoire that includes associative …
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Feed intake in chickens: genetic and social factors
The effects of genetic and social factors influencing ingestive behaviors, growth, livability, and dietary self-selection were investigated in three experiments. In Experiment I, ingestive behaviors, livability, and body weight were measured in lines of White Plymouth Rock chickens selected for …
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Identification of quantitative trait loci, candidate genes and diagnostic markers for Hessian fly resistance in wheat
… (SNPs) developed from recombinant inbred lines (RILs) of Parvaz-94 x Cadenza. QHf.hwwg-1AS.2 and QHf.hwwg-6BS.2 were mapped to a 4.0 Mb interval (4.6–8.6 Mb) on 1AS and a 5.4 Mb interval (2.3–7.7 Mb) on 6BS, respectively, based on IWGSC RefSeq v2.1 reference. QHf.hwwg-6BS.2 alone conferred …
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The adaptive potential of plant endopolyploidy in response to herbivory
… of apical dominance undoubtedly alters both genetic and physiological processes to maximize rapid regrowth (particularly in axillary bud break and stem elongation), recent studies have targeted possible mechanisms for facilitating rapid regrowth in overcompensating organisms. One possible …