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 23 for “"Marker-assisted breeding"”.
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Economic Impact Analysis of Marker-Assisted Breeding in Rice
… for rice, particularly on marginal lands. Marker-aided backcrossing (MAB), enabled by advances in genomics and molecular mapping in recent years, is said to be a more precise, time-saving, and cost-effective way to develop rice varieties that can withstand these abiotic stresses than …
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Agronomic and marker-assisted breeding strategies for improving nitrogen use efficiency in maize
… N-use traits and their application in maize NUE breeding programs, iii) understand the relative merits of important agronomic factors (e.g. N stress tolerance, yield response to N fertilizer, crowding stress tolerance, and yield response to narrower row spacing) to maize yield, and iv) evaluate …
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Dissection of black rot resistance towards marker-assisted breeding in grapevine Pedigree reconstruction and phenotyping optimization coupled with high-density linkage mapping revealed a major QTL associated with bunch resistance.
… with the pathogens, and their exploitation in breeding is a valuable strategy to reduce pesticide treat-ments. Black rot (BR) is a destructive disease caused by the ascomycete, Phyllosticta ampeli-cida, whose telomorphic form was known as Guignardia bidwellii. In the European continental area …
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Association Between SCN Resistance and Yield in Soybean, And, QTL Mapping of Field Resistance to Sclerotinia Sclerotiorum in Soybean
… both studies will enable soybean breeders to use marker-assisted breeding for the development of SCN resistant cultivars with higher yield potential and the development of soybean cultivars with increased levels of resistance to Sclerotinia stem rot.
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Simultaneous Mapping and Pyramiding of Fusarium Head Blight Resistance Loci in Wheat Breeding Populations
… creates a disjunction between QTL mapping and marker-assisted breeding efforts aimed at pyramiding QTL, since no direct bridge exists between the populations within which these activities are conducted. Through this body of research, we demonstrate the application of linkage analysis directly …
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Genomewide Selection in Apple: Prediction and Postdiction in the University of Minnesota Apple Breeding Program
Although marker assisted breeding is now considered routine in apple breeding programs, the adoption of genomewide selection is still in its infancy. Genomewide selection offers the potential to be a valuable tool to apple breeders. The first aim of this research was to assess the predictive …
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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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Assessment of a Muscadine Grape (Vitis rotundifolia) Mapping Population for Tolerance to Pierce’s Disease Pathogen Xylella fastidiosa and Resistance to Black Rot Disease Pathogen Guignardia bidwellii
… on 80,507 single-nucleotide polymorphism (SNP) markers. Results showed that only 10 genotypes were positive for PD during both seasons, and the average disease severity in the mapping population for black rot ranged from 0.09% to 14.10%. The GWAS analysis, using genotypic data and phenotyping …
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Application of genetic and statistical tools for improvement of Louisiana rice
Breeding for grain quality traits and resistance to sheath blight (SB), a disease caused by Rhizoctonia solani Kuhn, are important objectives for the rice (Oryza sativa L.) industry. Grain quality traits and SB resistance play an important role in the economic prosperity of commercial rice markets. …
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Broadening the wheat gene pool for stem rust resistance through genomic-assisted introgressions from Aegilops tauschii
… of Ae. tauschii accessions with an elite wheat breeding was used to initiate transfer of resistance. Genetic mapping of resistance was accomplished during gene transfer through development of BC[subscript]2 mapping populations. Bulked segregant analysis of BC[subscript]2F[subscript]1 genotypes …
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Background-dependent genetic architecture of Fusarium head blight resistance in U.S. hard winter wheat
… resistance quantitative trait loci (QTL) through marker-assisted breeding is an effective strategy for improving resistance; however, the effectiveness of QTL combinations and the genomic architecture of introgression populations remain incompletely understood. This study evaluated the effects of …
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Identification of molecular markers and association mapping of selected loci associated with agronomic traits in rice
… as a procedure was evaluated to select molecular markers associated with complex traits in US rice germplasm. Markers for percent head rice, percent total rice, and grain yield were identified with high levels of correct classification that mapped within or near traditional Quantitative Trait Loci …
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Development and Characterization of Microsatellite Markers for the Grain Amaranths (Amaranthus spp. L.)
… highly informative, reproducible microsatellite markers for the grain amaranths. A total of 1457 clones were sequenced from three genomic libraries enriched for the microsatellite motifs AAC, AAT and AC. Of these, 353 (24%) contained unique microsatellites. An additional 29 microsatellite loci …
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Characterization of malus germplasm and QTL mapping of fruit quality traits
… efficient germplasm management and efficiency in breeding programs such as appropriate selection of genetically 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 …
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Understanding Plant Pathosystems in Wild Relatives of Cultivated Crop Plants
… that responded to core effectors. We are using marker assisted breeding to map disease resistance traits in recombinant inbred (RI) lines. To better understand pathosystems, we examined host resistance and susceptibility using bioinformatics. We analyzed the interaction between Arabidopsis …
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Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program
… (PBA) approach was performed in the peach breeding program for the first time. The pedigree consisted of seven-F1 populations, their parents, ancestors, and cultivars. Flesh firmness and titratable acidity (TA) were examined in 2011, 2012, and 2013. For TA, a consistent and strong QTL was …
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Characterization of Hulled and Hulless Winter Barley, Hordeum vulgare L., Through Traditional Breeding and Molecular Techniques
… for improvement using traditional and molecular breeding techniques. Identification of genomic regions conferring resistance to Fusarium head blight (caused by Fusarium graminearum), leaf rust (caused by Puccinia hordei G. Otth), powdery mildew [caused by Blumeria graminis (DC.) E.O. Speer f. sp. …
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Identification of quantitative trait loci, candidate genes and diagnostic markers for Hessian fly resistance in wheat
… predominant HF biotypes, and lack of diagnostic markers for breeding selection. To discover new resistant sources, screening Pakistani wheat landraces and cultivars identified a highly HF resistant wheat cultivar ‘Parvaz-94’. Two QTL (QHf.hwwg-1AS.2 and QHf.hwwg-6BS.2) were mapped using a …
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Discovery and characterization of genes controlling nitrogen utilization in maize
… elite maize hybrids, perhaps as a compromise breeding solution to developmental, physiological and metabolic tradeoffs such as the remobilization of N from vegetative source to reproductive sink organs. Reliable production of preferred heterozygous genotypes is thus operationally achieved by …
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