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Showing 1 to 20 of 241 for “"Quantitative Trait Loci"”.
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The LASSO linear mixed model for mapping quantitative trait loci
This thesis concerns the identification of quantitative trait loci (QTL) for important traits in cattle line crosses. One of these traits is birth weight of calves, which affects both animal production and welfare through correlated effects on parturition and subsequent growth. Birth weight was one …
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A Genome Scan for Quantitative Trait Loci in Dairy Cattle
A genome scan for quantitative trait loci (QTLs) influencing milk production, health and conformation traits was completed in Holstein-Friesian cattle using a granddaughter design. Eight half-sibling families consisting of 1,068 bulls were genotyped for 174 microsatellite markers. The markers …
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EVALUATION OF SCAB RESISTANCE QUANTITATIVE TRAIT LOCI (QTL) EFFECTS ON WHEAT
Fusarium Head Blight (FHB) of wheat (<italic>Triticum aestivum</italic>), caused by <italic>Fusarium graminearum</italic>, is a disease that periodically strikes the mid-Atlantic region of the USA. Breeding for resistant wheat cultivar is an effective method of disease control. McCormick, a …
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Preliminary quantitative trait loci analysis for biomass traits in Miscanthus sinensis
… of progeny. Establishing correlations between traits exhibited during the establishment phase and plot yields and developing a marker assisted selection program would allow earlier selection. With this in mind, a QTL study was conducted in a pseudo testcross mapping population segregating for …
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Quantitative Trait Loci Analysis of Low Temperature Responses in Grapevine F2 Population
… Freezing tolerance is a multi-genetic, complex quantitative trait that involves many related traits like dormancy induction, growth cessation, acclimation, deacclimation and bud break. Developing an understanding of the genetics behind the complex trait requires connecting the phenotype with the …
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Identification and characterization of metabolic Quantitative Trait Loci (QTL) in Arabidopsis thaliana
… and its relation to plant growth using quantitative genetics methods. A special focus was set on the characterization of heterosis, the deviation of hybrids from their parental means for certain traits, on a metabolic level. More than 2000 samples of recombinant inbred lines (RILs) and …
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Molecular marker-facilitated study of quantitative trait loci in a maize population
… regions for the following three categories of traits: resistance to second generation European corn borer (Ostrinia nubilalis Hubner) (2ECB), morphological traits (plant height, ear height, anthesis and silk emergence) and yield component traits (grain yield/plot, ear number/plot, 300-kernel …
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Robustness And Power of a TDT Statistic for Mapping Quantitative Trait Loci
… recently been extended to the identification of quantitative trait loci (QTLs). A general TDT (TDTG) has been developed to test linkage and/or linkage disequilibrium between a QTL and a marker in nuclear families that may be composed of more than one heterozygous parent and multiple children. In …
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Mapping quantitative trait loci using multiple linked markers via Residual Maximum Likelihood
Mapping quantitative trait loci in outbred populations is important since development of inbred lines in livestock species is usually not feasible. Traditional genetic mapping methods, such as Least Squares and Maximum Likelihood, cannot fully accommodate complex pedigree structures, and more …
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Mapping Quantitative Trait Loci for Soybean Quality Traits from Two Different Sources
… segregating for genes controlling quality traits was chosen for this study. Both parental lines have high sucrose and low stachyose. The former contains a high level of phytate while the latter is low phytate. The objective of this experiment was to determine whether or not both parents had …
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Quantitative Trait Loci (Qtl) Analysis Of Sulfur Sensitivity In Vitis Aestivalis-Derived 'Norton'
… repeat (SSR) markers, respectively. A major quantitative trait loci (QTL) for sulfur sensitivity was detected on linkage group 14 (LOD=15). Identification of this QTL will allow future grape breeding programs produce commercially suitable hybrids, which do not display sulfur sensitivity, via …
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The Identification of Quantitative Trait Loci for Sucrose and Stachyose Content in Soybean Seed
… The objectives of this study were to identify quantitative trait loci (QTL) or genes associated with seed sucrose and stachyose content using simple sequence repeat (SSR) or single nucleotide polymorphism (SNP) markers. A low sucrose line, MFS-553, was crossed with a high sucrose plant …
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Fine mapping studies of quantitative trait loci for baseline platelet count in mice and humans
Platelet count is a complex trait with a substantial genetic contribution. Platelets have a fundamental role in normal haemostasis, with both increases and decreases of the platelet count associated with significant mortality and morbidity. Despite the significant genetic component contributing to …
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Quantitative Trait Loci Associated with Waterlogging Tolerance in a Soft Red Winter Wheat Mapping Population
… inbred line (RIL) population and to identify quantitative trait loci (QTL) associated with tolerance and productivity. Experiments were carried out in both the greenhouse and the field using a RIL population derived from the wheat cultivars `USG3209' and 'Jaypee'. The effect of vegetative …
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Multiple trait analysis for genetic mapping of quantitative trait loci for carcass and beef quality
The use of molecular markers to identify quantitative trait loci ( QTL ) affecting economically important traits has become a key approach in animal genetics, both for understanding the genetic basis of these traits and to help design novel breeding programs. The general goal of the present work …
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Quantitative trait loci mapping for grain yield and other traits of agronomic importance in maize
Several marker loci were associated with more than one trait. Thus genes controlling these traits may map to the same chromosomal regions or have pleiotropic effects. Although a number of marker loci were associated with genotype by environment interactions (GXE) for grain yield among individual …
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Identification of quantitative trait loci, candidate genes and diagnostic markers for Hessian fly resistance in wheat
… Although over 50 HF resistance (H) genes and quantitative trait loci (QTL) have been reported, only a few of them have been deployed in limited areas due to their loss of effectiveness against predominant HF biotypes, and lack of diagnostic markers for breeding selection. To discover new …
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