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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 66 for “"heterosis"”.
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Heterosis in Simmental-Angus rotational cross calves
Call number: LD2668 .T4 1985 K74
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Heterosis in Simmental-Angus rotational cross calves
Call number: LD2668 .T4 1985 K74
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Genetics of initial imprinting responses: selection, and heterosis
… and stay-near tendencies provided evidence of heterosis. This demonstration of non-additive effects implies fitness roles for these traits and supports the idea that they indicate imprinting tendencies. Time of day tested, sex, hatch, mating type, developmental age, and 24-hr body we1ght were …
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Heterosis between semidormant and nondormant derived alfalfa germplasm
… increase yield in alfalfa is through capturing heterosis. Heterotic groups are genetically distinct germplasms that, when hybridized, repeatedly produce progeny that express heterosis. In alfalfa, three main heterotic groups have been proposed in the United States: dormant M. falcata, …
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Heterosis in a broad range of alfalfa germplasm
… germplasm displayed superior biomass yield and heterosis compared to Asian falcata germplasm. The superior European performance was likely due to genetic differentiation between European and Asian material. In addition climate of origin variable selection on parental falcata genotypes caused …
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A systems biological approach towards the molecular basis of heterosis in Arabidopsis thaliana
Heterosis is defined as the superiority in performance of heterozygous genotypes compared to their corresponding genetically different homozygous parents. This phenomenon is already known since the beginning of the last century and it has been widely used in plant breeding, but the underlying …
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Genetic Interpretation of Heterosis and Maternal Effects in Reproduction and Growth of Swine
Made available in DSpace on 2014-12-05T17:47:33Z (GMT). No. of bitstreams: 1 0025273.pdf: 4323061 bytes, checksum: 47867adb64e999f715771baae494b468 (MD5) Previous issue date: 1957
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The Genomic Basis of Heterosis in High-Yielding Triploid Hybrids of Willow (Salix spp.) Bioenergy Crops
… willow breeding because hybrids often exhibit heterosis for yield. The genomic basis of heterosis in willow has not been well characterized, especially in high-yielding triploid hybrids. The primary objectives of this study were 1) to evaluate diverse diploid, triploid, and tetraploid families …
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Combining ability, protein, heterosis, and prediction of F₁ performance with RFLPs in a diallel of maize
Improving protein quality and identifying superior inbreds and hybrids are significant challenges in commercial maize breeding programs. These two problems were addressed in separate studies on inbreds and hybrids from a complete diallel cross of 12 elite proprietary inbred lines of maize evaluated …
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Investigating the role of regulatory genes in heterosis for superior growth and biomass production in Arabidopsis thaliana
‘Heterosis’ is a term used in genetics and breeding referring to hybrid vigour or the superiority of hybrids over their parents in terms of traits such as size, growth rate, biomass, fertility, yield, nutrient content, disease resistance or tolerance to abiotic and abiotic stress. Parental plants …
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Estimation of heterotic effects on stayability in beef cattle
… traits should be subject to higher levels of heterosis in crossbreeding programs. Therefore, heterosis should have a positive effect on the cows' ability to remain in the herd until age six. The objective was to estimate maternal and individual heterosis values for stayability. Data was …
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Heterosis in compositional, physical, and wet-milling characteristics of hybrids from exotic introgressed by adapted inbred lines in corn
… and (ii) determine the expression of heterosis in physical, compositional, and wet-milling characteristics of the F1 and F2 generations of hybrids from their crosses with adapted inbred lines. Ten inbred lines from the Germplasm Enhancement of Maize (GEM) project introgressed with …
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Developing Hybrid Cotton (Gossypium spp.) Using Honey Bees as Pollinators and Roundup Ready® Gene as Selection Trait
… Results indicate that all crosses exhibited heterosis in the F1 hybrid populations relative to the best parent. The crosses LA1110023/PHY410R and ARKRM24-12-04/PHY410R exhibited a higher degree of heterosis for yield averaging 33.1% and 20.6%, respectively, across locations. Yield heterosis …
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Agronomic performance of soybean [Glycine max (L.) Merr.] hybrids
… (BC1, BC2, and BC3), and (2) to estimate heterosis for yield, and other agronomic characteristics of the hybrid populations. Parental genotypes were male-sterile lines and a group of male parents selected for their agronomic performance. The few positive high-parent heterosis (HPH) and …
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Novel strategies for genomic and phenomic investigations of quantitative traits in maize (Zea mays L.)
… that contributes to maize yields increase is heterosis, the phenomenon that hybrid offspring outperform their inbred parents. Despite its wide application in plant breeding, the molecular mechanism of heterosis remains elusive. To identify candidate genes associated with hybrid performance and …
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Determinación de aptitud combinatoria de ocho lineas de maiz (Zea mays L.) derivadas de la población 76 C2 (Tropical Intermedia Blanco Cristalino)
… las mejores cruzas simples y (3) Determinar la heterosis de las cruzas simples en estudio. Se establecieron tres ensayos uniformes, dos en la época de primera y uno en postrera, el diseño experimental fue un Bloques Completos al Azar, con cuatro repeticiones. El análisis de las cruzas dialélicas …
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Characterizing Deleterious Genomic Mutations in The Presence of Overdominance (a Computer Simulation Approach)
… assumption, overdominance does not contribute to heterosis and standing genetic variation. The extent to which this assumption is valid is unknown. In this dissertation, I investigated the statistical properties and the robustness of these two alternative methods in the presence of overdominant …
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Genetic diversity of midwestern oat germplasm
… diallel mating design without reciprocals. F(,1) heterosis for grain yield was evaluated in two experiments, and 48 F(,2)-derived lines from each of the 36 matings were evaluated for bundle weight, grain yield, straw yield, harvest index, height, and heading date in two experiments. Number of …
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Identification and characterization of metabolic Quantitative Trait Loci (QTL) in Arabidopsis thaliana
… 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 introgression lines (ILs) developed from the two accessions Col-0 and C24 were …
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