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 32 for “"genetic gain"”.
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Genetic gain X management interaction in soybean: seeding rate effect
Plant breeders have increased genetic yield potential of soybean during the past century. The plant characteristics which soybean breeders have selected that have contributed most to those yield gains are not well understood. The hypothesis states that plants from recently released cultivars can …
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DEVELOPMENT OF NOVEL BIOTECHNOLOGICAL APPROACHES FOR ACCELERATING GENETIC GAIN IN THE BOVINE
… and animal welfare standards. Accelerating genetic gain in cattle (Bos taurus) is essential for breeding animals that are more resilient to climate change, more resistant to disease, and capable of higher meat and milk productivity—all while minimizing their environmental footprint. One …
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Evaluation of soybean aphid resistance, yield qtl confirmation, and genetic gain in soybean
… objective of increasing the understanding of the genetics of soybean aphid resistance. In addition, 104 soybean aphid resistant PIs were haplotyped in the regions of Rag1 and Rag2 to gain information about the commonalities and differences in the genetic regions surrounding these genes. Resistance …
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LEVERAGING EVOLUTION TO UNDERSTAND GENETIC LOAD IN CASSAVA (MANIHOT ESCULENTA)
… and limited sexual reproductive ability. Genetic load due to the accumulation of underlying deleterious mutations has been hypothesized as an underlying cause for these difficulties. In recent years genomic selection has been adopted as a strategy to accelerate genetic gain and quickly …
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Implications of Connectedness in the Genetic Evaluation of Livestock
The reliability of genetic evaluations across separate management units (e.g. flocks) depends on the extent of genetic links or connections among animals in these units. Where poor connectedness exists, comparisons of estimated breeding values (EBV) across units may be biased. The objectives of …
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The Regulation and Function of Drosophila Acinus
… pro-growth transcriptional co-activator Yorkie. Genetic gain- and loss-of function experiments indicate that this Atg1 function depends on Acinus. This work provides a new role for Atg1 in inhibition of growth and thereby adding a new regulatory pressure on Yorkie. Furthermore, my data indicate …
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Heritability and repeatability estimates of first service conception and first cycle calving in Angus cattle
… to minimize these costs while increasing genetic gain and income. However, historically the investigation of fertility traits has been minimal due to the binary nature of many of the traits making analysis difficult. In addition, given the nature of the phenotypes, heritability estimates …
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Diversifying crop systems by developing intercropping breeding strategies for improving forage yield and quality in oat-legume mixtures
… breeding requires preliminary understanding of genetic variation, trait heritability and correlations, and the relationship between monoculture and mixture performance to streamline selection strategies. We used oat-pea mixtures as a use case for the potential of cereal-legume intercropping …
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Genetic improvement for nitrogen utilization in maize
… of phenotyping approaches to optimize genetic gain. We documented genetic variation for NUE and its component agronomic traits among a diverse collection of historical and recent elite maize inbreds and hybrids grown in field trials with different levels of soil N supply. Many of the …
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The Evaluation of Root System Architecture (RSA) As A New Breeding Target for Climate-Resilient Winter Wheat (Tritium aestivum L.)
… sustainability of crop production will depend on genetic capacity of crops to adapt to increased biotic and abiotic barriers induced by climate change. Historically, shoot-based traits were breeding targets for overcoming yield gaps between developed and undeveloped nations. However, the rate of …
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Factors Affecting Within-plant Variation of Cotton Fiber Quality and Yield
… spinning and the quality of the yarn produced. Genetic and environmental factors affect the development and consequently, the final properties of cotton crops. However, information is lacking about the degree of influence they impart, especially on fiber perimeter (fineness) and cell wall …
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Population genomics and domestication of the Black Soldier Fly (Hermetia illucens L.)
… Improved knowledge of the evolutionary history, genetic diversity and potential for genetic improvement of this species will be fundamental to the success of this important industry. I investigate the role of domestication and its impact on the genome of *H. illucens*. I developed a suite of …
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Trade implications of gene-edited wheat under different regulatory scenarios
… and their imports are banned. Additionally, the genetic gain from using gene-editing technology does not offset the market loss by countries that export gene-edited wheat.
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Characterizing phenotypic diversity, genotype by environment interactions, and optimizing selection efficiency of a miscanthus germplasm collection
… Although highly productive, the sterility and genetic uniformity M. ×giganteus complicates crop improvement. Evaluation of available Miscanthus germplasm is necessary in order to create additional improved cultivars for biomass production. The overall objective of this project was to evaluate …
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Accelerated breeding for winter wheat profitability in a wheat-soybean double-crop system
… dissertation aims to understand and accelerate genetic gain for SRWW under these agronomic and economic constraints using genetic trend analyses, multi-trait genomic prediction of total net merit, and training-set design optimization for early-stage advancement. Three questions organize the …
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Post-Transfer Outcomes in Cultured Bovine Embryos Supplemented with Epidermal Growth Factor, Fibroblast Growth Factor 2, and Insulin-Like Growth Factor 1
… issues and provide a means to enhance genetic gain for production traits. An uterine paracrine factor cocktail containing epidermal growth factor (EGF), fibroblast growth factor 2 (FGF2), and insulin-like growth factor 1 (IGF1) (collectively termed EFI) was recently identified as a …
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Assessment of methods to screen for carotenoids in yellow-fleshed potato germplasm
… to improve selection efficiency and accelerate genetic gain in nutritional quality of potato cultivars. Phenotypic tuber flesh color (FC) rating (0 – 3), chroma values, and individual and total carotenoids data were collected, processed and combined with multivariate analyses to help in REIMS …
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Breeding Design for Atlantic Cod (Gadus morhua L.)
… Iceland. Throughout the rearing an estimation of genetic (co)variation of economically important traits and genotype by environment interactions (G×E) among the two rearing locations were explored. Atlantic cod in Iceland shows high additive genetic variance for body weight (h2 = 0.34), suggesting …
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Modelización de la arquitectura de copa y de la producción de piñón en plantaciones clonales de Pinus pinea L
… analysed and related with weather registers. Genetic parameters of cone production at tree scale were estimated after adjustment of both environmental size-yield correlations and nearest neighbour correlations. The degree of genetic determination was about 7-41% in the different trials, with …
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Genomic Selection, Quantitative Trait Loci and Genome-Wide Association Mapping for Spring Bread Wheat (Triticum aestivum L.) Improvement
… to overcome the limitation of MAS and improve genetic gain of quantitative traits. GS is a type of MAS that estimates the effects of genome-wide markers to calculate genomic estimated breeding values (GEBVs) for individuals without phenotypic records. In recent years, GS is gaining momentum in …
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