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 30 for “"Marker Assisted Selection (MAS)"”.
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Methods to Improve Marker Assisted Selection (Mas) for the Sugary Enhancer1 (Se1) Trait in Maize
… for the se1se1 genotype each year. SSR and RAPD markers from regions previously associated with kernel sugars did not identify a linked marker for se1.
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Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program
<p>For over two decades the incorporation of marker-assisted selection (MAS) has been discussed as an innovative approach to increase peach breeding efficiency. Although hundreds of quantitative trait loci (QTLs) have been identified, only a few have been converted into usable MAS tools. This …
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Incorporating molecular markers into applied maize breeding
… were conducted to study applying molecular marker technologies to maize breeding. Both isozymes and restriction fragment length polymorphisms (RFLPs) were used as markers, and associations were established between these markers and different quantitative traits. Comparisons were made between …
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Toward genetic marker-assisted improvement of aquaculture stocks
… quantitative trait loci (QTL) detection and marker-assisted selection (MAS) to genetic improvement of aquaculture species. Genes affecting aquaculture performance, or quantitative trait loci (QTLs}, can be mapped in relation to naturally-occuring genetic markers. Knowledge of linkages between …
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Quantitative Trait Loci (Qtl) Analysis Of Sulfur Sensitivity In Vitis Aestivalis-Derived 'Norton'
… (SNPs) and simple sequence 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 …
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Construction and analysis of the pangenome of Cucurbita moschata to uncover variants associated with virus resistance
… virus (PRSV). The development of molecular markers linked to virus resistance can greatly assist breeding programs through marker-assisted selection (MAS). This study aims to identify quantitative trait loci (QTLs) associated with MWMV resistance in butternut using a pangenome-assisted bulk …
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An ex ante economic impact analysis of developing low cost technologies for pyramiding useful genes from wild relatives into elite progenitors of cassava
… It compares the economic benefits of marker-assisted selection (MAS) to conventional breeding for these traits. Results indicate that varieties developed with marker-assisted breeding that incorporate all three traits are worth US$2.89 billion in Nigeria, $854 million in Ghana, and …
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A Genetic Approach towards Modulating Pre-Harvest Pod Shatter in Brassica napus (Oilseed Rape)
… and includes a number of candidate gene markers with established roles in fruit development in Arabidopsis. The linkage map was used as a basis to perform a QTL analysis where a number of loci associated with increases in PSR in B. napus have been identified. Genetic markers linked to …
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Estudo de polimorfismos do gene candidato, fator miogênico-5 (myf-5), em suínos
… características de importância econômica. Algumas regiões genômicas possuem genes que exercem efeitos sobre determinada característica. Nessa mesma região, podem existir seqüências polimórficas, não codificadas, que servem como marcadores e, se estiverem em desequilíbrio de ligação, podem ser …
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Identification of Native FHB Resistance QTL in the SRW Wheat Cultivar Jamestown
… Jamestown and to identify tightly linked DNA markers associated with those QTL so that marker-assisted selection (MAS) can be used in pyramiding these and other known QTL into elite backgrounds. Types of resistance assessed in this study include: Type I (resistance to initial infection; …
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The genetic determinants of vigour control and precocity by pear (Pyrus communis L.) rootstocks
… is a major focus in pear rootstock breeding. Marker assisted selection (MAS) could help to shorten this time consuming and costly breeding process. The aim of this PhD project was to examine the genetic determinants of vigour control and early flowering conferred to a scion by Pyrus …
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Selection indices for combining marker genetic data and animal model information
It was suggested that marker and phenotypic information be combined in order to obtain more accurate or earlier genetic evaluations. An improvement in accuracy or time of evaluation due to utilization of marker assisted selection (MAS) increases genetic progress. Fernando and Grossman (1989) …
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Quantitative trait loci (QTL) for metabolite accumulation and metabolic regulation : metabolite profiling of interspecific crosses of tomato
… limited and molecular technologies, such as marker assisted selection (MAS) are currently being exploited to re-introduce allelic variance from wild species. Molecular breeding strategies have mostly focused on the introduction of yield or resistance related traits to date. However given that …
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Selection of Drought-Tolerant Soybean Lines Using a Field Screening Method and Identification of QTLs for Slow Wilting and Nitrogen Fixation Associated With Drought-Tolerance
… the development of tolerant lines through marker-assisted selection (MAS). The objectives of this study were: 1) to evaluate whether selection of high-yielding lines under irrigation in the preliminary stage is a positive predictor of the performance of these lines under drought conditions, …
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Quantitative Trait Loci (QTL) for Salt Tolerance in Soybean and Physiological Response to Salt Stress During Early Growth Stage
… a moderately salt–sensitive crop. Breeding selection is a promising strategy to improve salt tolerance as soybean germplasm display wide variation in response to salinity stress. However, the physiological and genetic mechanisms for salt tolerance are not quite clear. The discovery of novel …
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Genetic Analysis and Marker -Assisted Selection of Scab Resistance QTL in Bread Wheat (Triticum Aestivum L.)
… Based on the mapping data of 700 AFLP and SSR markers in a population of 133 recombinant inbred lines (RILs) derived from Ning7840/Clark, three chromosomal regions associated with scab resistance were detected in a common cultivar, Ning7840. Interval analysis based on the integrated map of AFLP …
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QTL Mapping and Molecular Dissection of Meat Quality Traits in Swine
… traits cannot be assessed in the live animal, selection for these traits must rely upon genetic determinants known as quantitative trait loci (QTL). To facilitate fine-mapping of swine QTL, a ∼1 Mb-resolution human-pig comparative map, composed of 2,274 markers in 34 linkage groups, was …
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Validation and Marker-Assisted Selection of Two Major Quantitative Trait Loci Conditioning Fusarium Head Blight Resistance in Wheat
… to FHB is an ideal trait for which molecular marker assisted selection (MAS) would facilitate breeding and cultivar development efforts. Validation of quantitative trait loci (QTL) conferring FHB resistance is a prerequisite for MAS. This study was conducted to validate and evaluate the effect …
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Genomic Selection, Quantitative Trait Loci and Genome-Wide Association Mapping for Spring Bread Wheat (Triticum aestivum L.) Improvement
Molecular breeding involves the use of molecular markers to identify and characterize genes that control quantitative traits. Two of the most commonly used methods to dissect complex traits in plants are linkage analysis and association mapping. These methods are used to identify markers associated …
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Mapping of brown stem rot resistance, genetic yield gains, and yield impact of soybean cyst nematode
… and mapped to a large region on chromosome 16. Marker-assisted selection (MAS) will be more efficient and gene cloning will be facilitated with a narrowed genomic interval containing an Rbs gene. The objective of this study was to fine map the positions of Rbs genes from five sources. Mapping …
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