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.
Results
Showing 1 to 20 of 25 for “"Genotype-by-environment interactions"”.
-
Investigating the Capacity of Generative AI to Learn Genotype-by-Environment Interactions in Brachypodium distachyon
Climate change exacerbates environmental stressors such as drought, challenging the resilience of agricultural systems and highlighting the need to understand plant genomic architecture and its responses to such environmental variation. A key molecular mechanism underlying these responses is …
-
Characterizing phenotypic diversity, genotype by environment interactions, and optimizing selection efficiency of a miscanthus germplasm collection
Increasing concerns over energy security and the environmental effects of conventional fuels has spurred interest in alternative avenues of energy production, with biomass feedstocks emerging as a promising source of sustainable renewable energy needs. Miscanthus is a largely unimproved crop and …
-
Genotype by Environment Interactions and Selection Responses of Two Maize Populations to Reciprocal Recurrent Selection in a High-Yield Environment (Corn)
… family selection for grain yield in a high-yield environment. Interpopulation improvement involved selection of testcrosses of S(,1) family x inbred tester in a high-yield environment.
-
Quantitative trait loci mapping for grain yield and other traits of agronomic importance in maize
… a number of marker loci were associated with genotype by environment interactions (GXE) for grain yield among individual environments each year, the associations detected for combined environments within a year were stable between 1991 and 1992.
-
Genomic selection studies in sheep using simulation and real data
… evaluates genomic selection strategies and genotype-by-environment modeling to improve genetic gains through sustainable breeding practices in sheep. It integrates a thorough review of sheep breeding programs in Turkey, a forward-looking simulation study of genomic selection in Akkaraman …
-
An integrative approach for germplasm utilization, genetic diversity and QTL mapping in Camelina spp. and crop-production issues in Thlaspi arvense, new promising oilseed crops for bioenergy and industrial uses
… oil reserves, rising prices and negative environmental implications have all contributed to growing demand for alternative energy sources, such as bioenergy crops. Ideally a good bioenergy crop has low input requirements (able to grow in marginal zones), fast growth and maturity, tolerance …
-
Effects of habitat degradation on the evolutionary dynamics of populations in a rainforest cycad (Gymnospermae)
… even in the short-term. Here, I explore how environmental changes after habitat degradation affect the evolutionary dynamics of populations of the rainforest cycad Zamia fairchildiana, specifically how habitat degradation affects gene dispersal, inbreeding, directional selection, and …
-
Enhancing Economic and Environmental Value in Soybean Production through Value-Added Innovation
… soybean plant introductions across multiple environments, revealing significant genotype-by-environment interactions affecting fatty acid profiles. A metabolite-based genome-wide association study identified 20 single nucleotide polymorphisms (SNPs) significantly associated with 21 fatty acid …
-
Effects of barley yellow dwarf virus and environment on grain avenanthramide concentration in spring oat (Avena sativa L.)
… interact with pathogens, the regional genotype-by-environment interactions of AVN concentration, and the heritability of AVN concentration. This study explored the relationship between Barley Yellow Dwarf Virus (BYDV) and avenanthramide concentration, as well as the …
-
Systems Analysis of Plant Responses to Drought
Understanding how plants respond to environmental stress is critical for ensuring stable crop performance and predicting how natural populations may adapt to a changing climate. While plant biology has traditionally focused on plant physiology and molecular biology of model plants to elucidate …
-
Genomic and Physiological Approaches to Improve Drought Tolerance in Soybean
… Direct selection of drought tolerance among genotypes for yield is limited because of low heritability, polygenic control, epistasis effects, and genotype by environment interactions. Crop physiology can play a major role for improving drought tolerance through the identification of traits …
-
Characterization of malus germplasm and QTL mapping of fruit quality traits
… diverse parents and selection of superior genotypes. Furthermore, location of quantitative trait loci (QTL) can lead to the development of markers for marker assisted breeding. By selecting for markers closely linked to significant QTL, early selection can efficiently increase the …
-
Genotype by environment interaction for Holstein milk yield and fitness traits between Saudi Arabia and the United States
… in the first four lactations were estimated by multiple-trait animal model using Method R procedures. The objectives of this study were to determine if genotype by environment interactions for milk yield and fitness traits exist between Saudi Arabia and the US and to investigate the …
-
Recommendations for selection efforts to improve the therapeutic quality of Echinacea angustifolia crops in British Columbia
… the genetic improvement of E. angustifolia by selecting phytochemically rich genotypes has garnered both scientific and commercial interest. This dissertation presents results of multi-disciplinary experiments intended to help establish scientifically based guidelines for breeding efforts …
-
Phomopsis castanea infection levels in chestnut from the North and South Islands of New Zealand
… differences were not observed, suggesting genotype by environment interactions. Other studies have shown a significant link between pollen source and incidence of 'P castanea' and subsequent nut-rot, this study has confirmed this link in the South Island but with low incidence in the range …
-
The ecological genetics of senescence and stress resistance in Caenorhabditis elegans
… and the rate of senescence are determined by the ecological conditions during a population's recent evolutionary history, and are intrinsically linked to other components of life history and to fitness. These traits should be examined in an ecological context, in which other aspects of the …
-
Genetic, environmental, and physiological factors involved in the precocious sexual maturation of chinook salmon (Oncorhynchus tshawytscha)
… A breeding experiment to test for genetic and environmental (temperature at early rearing) effects on the incidence of jacking in chinook salmon showed significant sire, dam, and environmental effects, as well as genotype-by-environment interactions. Heritability estimates for incidence of …
-
Digital Phenotyping and Genomic Prediction Using Machine and Deep Learning in Animals and Plants
… well as large-scale data collected in commercial environments is still limited. Therefore, the first two research chapters show how deep learning-based computer vision systems can enable accurate live body weight prediction for dairy cattle and pigs. These studies also address the challenges of …
-
Breeding Design for Atlantic Cod (Gadus morhua L.)
… 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 that selection for increased body weight is likely to be …
-
Genetic analysis of Cannabis flowering traits in differential environments
… due to both underlying genetic diversity and environmental heterogeneity. This dissertation describes research aimed at understanding how such traits are shaped and consists of two experimental chapters examining various aspects related to this. The first research chapter examines the …
Page 1 of 2