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 18 of 18 for “"correlated responses"”.
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Selection for feed conversion : direct and correlated responses and genetic parameters
Digitized by Kansas Correctional Industries
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Divergent Phenotypic Recurrent Selection for Nitrate Reductase Activity and Correlated Responses in Maize
… determine: the selection response of NRA and the correlated responses in grain yield, grain protein, dry matter production and related parameters. The correlative responses were obtained by growing C(,0) and the four composites from selection under comparable single season environments. Auxiliary …
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Correlated responses and parameter changes in a bidirectional selection experiment for body weight in chickens
… of eight-week body weight to selection, 2. Correlated responses and estimates of realized heritabilities, 3. Genetic correlations between the selected and unselected traits, 4. Phenotypic and environmental correlations between selected and unselected traits, and 5. The prediction of …
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Selection for Body Weight in Chickens: Resource Allocations and Scaling
Evaluated were correlated responses to 54-generations of divergent selection for 8-week body weight (BW) and of BW at other ages and reproductive traits. Evaluated first was the influence of scaling on phenotypic responses to selection, phenotypic correlations of means and standard deviations, and …
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Correlated evolution in experimental populations of yeast
… of lineages. Finally, I compared the direct and correlated responses to selection in both glucose and galactose in a nested reciprocal selection experimental design. This analysis revealed that (1) better adapted clones paid a larger cost of adaptation than poorly adapted ones; (2) direct and …
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Response to Selection for Pupal Weight With and Without Assortative Mating in Tribolium Castaneum
… response to selection for pupal weight (PW), and correlated responses for larval weight (LW) and pupation time (PT) in Tribolium castaneum. Prior to selection two groups, each with 50 males mated to 100 females were either R-mated or A-mated for 3 generations. At generation 3, 6 lines were formed …
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Long-Term Evolution of the Complex Eukaryote Tetrahymena thermophila
… temperatures, but did observe asymmetry in the correlated responses, whereby evolution in a warmer temperature increases growth rate at the lower temperature significantly more than the reverse. We also find the populations founded from a single newly produced sexual progeny are more evolvable …
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Reproductive Soundness and Egg Quality in Chickens Selected for Low and High Antibody Response
… The focus of this thesis was to investigate correlated responses in reproductive soundness and egg quality resulting from that selection. Forty-five hens and 25 roosters from each antibody line were used. In hens, commencement and intensity of lay, and egg quality, were analyzed; in both …
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Genetics, immunoresponsiveness, and disease resistance in chickens
… and there was no difference among haplotypes. Correlated responses of growth and reproductive traits in lines HA and LA were due to genetic correlations with antibody response. These genetic correlations were generally negative and are suggestive of differential allocation of resources. …
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Selection for milk somatic cell count in laboratory mice
… surviving to weaning) were measured to examine correlated responses to selection for SCC. Average response per generation for log2 SCC was small in both selected lines (HSCC = .0678 ±.0341, LSCC = .0384 ± .0390, P > .05). There was little per generation divergence between the selected lines …
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Genetic Variability, Correlations and Selection Response for Kernel Traits in Two Modified Endosperm Opaque-2 Maize Populations
… to estimate genetic variation, correlations and responses to S(,1) family selection for kernel traits in two modified endosperm o(,2) maize populations (D.O. mod. o(,2) and El. S.C. mod. o(,2)). In 1982, 120 S(,1) families were evaluated for percent modification, kernel density, 100 kernel …
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Resource allocation in chickens: genetic and nongenetic influences on development, growth and reproduction
… <i>ad libitum</i> (AL) feeding regimes. Positive correlated responses to selection for body weight included proportionally larger breast, legs, fat depots and small intestine. Negative responses included fecundity, feather and gizzard weights. The degree of non-additive genetic variation differed …
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Cell-type specific contributions to Rett Syndrome : neuronal and astrocytic signaling and sensory processing
… neuronal networks. Natural movies evoke reliable responses from pyramidal neurons in visual cortex and my work reveals that discrete microdomain regions of visual cortex astrocytes also exhibit temporally reliable and spatially correlated responses to natural scenes. I show that glutamate …
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Genetic analyses of reproductive behavior in the domestic fowl and the Japanese quail
… frequency in this species is primarily additive. Correlated responses of cloacal gland size and relative aggressiveness to selection for mating frequency are discussed in the context of alterations in physiological and behavioral responses.
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Correlated physiological responses in a bidirectional selection experiment for body weight in chickens
… for high and low body weight results in correlated responses of blood GSH, feed utilization, and metabolic rates. Further, although different light environments may result in varying responses in feed utilization and metabolic rates, line x light environments interactions were not …
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Developmental Gene Expression in the Small Intestine of Chickens from Lines Divergently Selected for High or Low Juvenile Body Weight
… development of the animal. This thesis examined correlated responses to selection in the developmental gene expression of the peptide transporter PepT1, the glutamate/aspartate transporter EAAT3, the sodium-dependent glucose transporter SGLT1, and the fructose transporter GLUT5 in the small …
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Evolutionary and ecological outcomes of tripartite mutualisms
… in nodules and arbuscules is not genetically correlated. Fertilized plants were able to lower their investment in AMF while subsequently increasing their nodule number. I also found no connection in the plasticity of either trait among families (i.e. families that altered their investment in …