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 35 for “"near-isogenic lines"”.
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Chlorophyll Retention in Near-Isogenic Lines of Soybeans
Backcross-derived near-isogenic lines of soybeans (Glycine max L. Merrill) having nuclear genes (genetic greens) and cytoplasm (cytoplasmic greens) controlling chlorophyll retention in Clark and Harosoy backgrounds were compared from one to three years to their normal counterparts in order to …
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Evaluation of Mycotoxin Accumulation and Bran Thickness Between Red and White Wheat (Triticum Aestivum L.) Near-Isogenic Lines
… products, and pose a potential food safety risk. Near-isogenic lines (NILs) of red and white winter wheat were developed for use in this study to examine kernel bran differences and identify the impact of any genetic differences on the accumulation of DON in bran. In four greenhouse trials, …
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The molecular basis of seed coat pigmentation in Glycine max
… (i) which have been preserved in the form of near isogenic lines. RFLP analysis conducted on near isogenic lines differing only in respect to the alleles at the I locus has shown that the dominant I allele (giving rise to yellow seed coats) can be associated with a 12.1 kb Hind III …
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EVALUATION OF SCAB RESISTANCE QUANTITATIVE TRAIT LOCI (QTL) EFFECTS ON WHEAT
… 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 genotype adapted to the mid-Atlantic region, was used in a …
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Discovery of novel regulators and genes in nitrogen utilization pathways in maize
… genomic techniques including mutants and near-isogenic lines. RNAseq was performed to profile changes in gene expression in both leaf and developing ear tissues of plants grown in the field with different levels of soil N supply during the period of active N remobilization. RNA profiles …
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Genotypic and Environmental Effects on Soybean Canopy Photosynthesis
… the first study, CER from chlorophyll-deficient, near-isogenic lines were compared with the normal pigmented wild-type. Periods were identified when the chlorophyll-deficient lines had higher instantaneous and daily total CER. The evidence taken in this study suggests that increased light …
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Disease escape in relation to a trade off between septoria tritici blotch and yield of wheat
… association mapping (Arraiano & Brown 2016). Near isogenic lines generated for this region show no significant differences in STB symptoms when leaves are directly inoculated with Z. tritici. However, trials that are naturally infected or inoculated at the base of the plant show clear …
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Genetic improvement of aphid resistance, protein, and elemental composition in soybean
… introgressed into Midwestern adapted soybean lines. In previous studies, the Rag2 resistance allele was shown to be associated with a seed yield reduction. The objective of this study was to confirm the reduction in yield associated with Rag2 and determine its cause. This was done by testing a …
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Effects of the Lr34 and Lr46 rust-resistance genes on other diseases of wheat
… blotch (STB), caused by Zymoseptoria tritici, in near-isogenic lines (NILs) of spring wheats Lal Bahadur (LB) and Avocet and mutant lines developed from LB, but not in an Lr34 NIL of Jupateco. A similar effect was observed in adult plants with artificial inoculation in polytunnels. The role of …
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Dissecting Earliness per se and Photoperiod heading date effects in bread wheat (Triticum aestivum)
… photoperiod and the poorly defined earliness per se (Eps) genes regulate flowering in plants. This thesis used elite hexaploid wheat varieties and focused on an Eps QTL on 1DL, and photoperiod QTLs on 1BL and 5AL short day QTL using doubled haploid (DH) populations. Four independent …
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A sorghum NAC gene is associated with variation in vascular development, biomass properties, and yield potential
… midrib color as the mapping phenotype. Near isogenic lines (NILs) were created, and flanking markers and genotyping-by-sequencing (GBS) were applied to BC3 and BC2F2 individuals to reduce the region of interest to a 38 kb interval containing 4 candidate genes. One of these genes is a NAC …
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Molecular and Physiological Aspects of Arbuscular Mycorrhizal Symbiosis with near-Isogenic White Clover: A Gene Expression Study
… is normally an out-breeding species. Near-isogenic lines (NILs) developed from inbred lines of clover are ideal candidates for genetic studies since important agronomic traits are fixed. Four closely-related NILs provided plant material with contrasting phenotypes when inoculated with …
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Quantitative expression analysis of four low-temperature-tolerance-associated genes during cold acclimation in wheat (Triticum aestivum L.)
… spring Manitou (Vrn-A1/Vrn-A1) and two near-isogenic lines (Spring Norstar (Vrn-A1/vrn-A1) and Winter Manitou (vrn-A1/vrn-A1), respectively) were used in these studies. Plants were sampled on three dates (Sept. 29, Oct. 12 and Oct. 26) in the fall of 2004. Accumulation of WCBF1 …
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Genetic analysis of the hl locus in maize
… of storage proteins (zeins) was also examined. Near isogenic lines (NILs) of Oh43 and H95 differing for alleles at the h1 locus were used to develop a mapping population of 50 BC1F1 individuals. The h1 locus was mapped with respect to 8 restriction fragment length polymorphisms (RFLPs) loci from …
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The effect of non-glaucousness, as conferred by Inhibitor of Wax 1, on physiology and yield of UK Wheat
… Xi19, Robigus and Einstein) created non-glaucous near isogenic lines (NILs) with Iw1. NILs were grown at multiple field trial locations in the east of England over four years. A long-term shade trial reducing incoming light by 40 and 60% was also carried out in 2014. Yield, and various …
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Cloning and Characterization of the dominant Inhibitor of Wax 1 (Iw1) gene in polyploid wheat
… was created. The non-glaucous doubled-haploid lines of this population showed increases in yield and green-canopy duration under UK conditions compared to their glaucous counterparts by on average 4.15% and 1.5 days, respectively. The aim of this study was to identify Iw1 via a positional …
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Identifying and dissecting novel QTL regulating seed fatty acid composition in Arabidopsis thaliana for the improvement of rapeseed oil
… and 13 QTL were selected for the development of Near Isogenic lines (NIL). NILs were used to test the robustness of QTL by ANOVA and 11 QTL were successfully validated for their effect on phenotype in this work. Finally a QTL detected in the NG population for 18:2/18:1 was chosen for fine mapping …
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Genomic Organization of Fatty Acid Desaturase-2 (Fad2 ) and Fatty Acid Desaturase-6 (Fad6) ESTs in Maize
… through the development and analysis of near isogenic lines for the umc65 marker. None of the fad2 or fad6 clones mapped to bin 6.04 where a large QTL for oleic and linoleic acids has been identified. Furthermore, no QTL for oleic and linoleic acid were associated with the map locations …
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Agronomic, quality, and genetic analysis of the Rht18 semi-dwarfing gene in a Canadian Western Red Spring Wheat (Triticum aestivum L.) background
… and quality differences between two set of near-isogenic lines with the same genetic background, but one carrying the gene and the other not. The Rht18 gene resulted in dwarfing by approximately 16.2 cm compared to the regular height NILs. It showed the expected benefits of reduced stem …
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The agronomic and molecular characterisation of Rht8 in hexaploid wheat
… breeding remains unclear. In the present study, near-isogenic lines contrasting for the Rht8/tall allele in the UK-adapted and photoperiod-sensitive variety Paragon were evaluated in trials with varying nitrogen fertiliser (N) treatments and water regimes across sites in the UK and Spain. Rht8 …
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