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 16 of 16 for “"Kernel Number"”.
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Water Status, High Temperature, and Genotype Effects on Some Processes Which Influence Maize Seed Set (Zea Mays L., Low Water Potential, Pollen Viability, in Vivo Assay, Stress)
… pollination and fertilization greatly reduce kernel number in maize (Zea mays L.). Studies were conducted to determine the response of ear receptivity (the ability of the ear to set seed if the silks are pollinated), pollen viability, and pollen production to heat and water stress. These …
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Sink-pulled simulation of the maize crop
… and CERES-Maize) are "source-oriented", in which kernel weight is predicted without simulating sink demand of the kernels. The major goal of this research is to develop a physiologically sound model to simulate vegetative and reproductive growth of maize;The objectives of this study are: (1) to …
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Within-row spacing effect on individual corn plant yield
… along the row. Plant spacing affected neither kernel weight nor kernel number per ear in 2011, but in 2012, kernel weight increased (by 2 mg) and kernel number (by 2.96 kernels per ear) for each additional cm of space occupied by a plant. The average per-plant grain yield was only slightly …
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Effects of panicle removal and nitrogen on yield of grain sorghum
… were used. Panicle removal increased the number of tillers and kernel weight but decreased yield (by reducing kernel number) in Segaolane and NK 2660. The kernel weight in Korwane did not respond to panicle treatments, but grain yield was reduced by panicle removal. In all cultivars, …
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Management of higher populations in maize
… averaged across all other treatments; however, kernel number and weight were significantly different and these differences accentuated grain yield under different management strategies. The selection of hybrids that can maintain a high kernel weight, without significantly reducing kernel number, …
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Maximizing corn yield potential through proper rate, placement, and timing of nitrogen fertility
… to maximize the yield potential and increase kernel number by promoting a strong start to the growing season. Supplying N in-season through fertigation further increased corn productivity by promoting N accumulation and helped extend the growing season by maintaining leaf photosynthetic …
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Genetic and agronomic approaches for improving nitrogen use and maize productivity
… genetic backgrounds and environments. Individual kernel weight is a largely untapped resource for improving maize yields, and several chapters of this dissertation highlight its importance. Responses of kernel number and kernel weight to increased N supply were negatively correlated, and kernel …
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A diallel study of flowering and of ear components of yield in Corn Belt maize and their interactions with population density
… on ear components of yield, and on components of kernel size. Density effects were highly significant for all traits, except for that of pollen shed duration, in the analyses combined over years. Hybrid-by-year interactions were highly significant for all traits. Correlations between GCA effects …
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Physiological aspects of relative changes in nitrogen and plant density stress tolerances over a 38-year period of US maize hybrid introductions
… accumulation, and sink strength, including kernel number, kernel weight, and ear growth rates; 3) quantify historic changes in dry matter and nitrogen dynamics during pre-silking and post-silking periods, as well as nitrogen internal efficiency; and 4) quantify the correlations between …
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Dissection of Soil Waterlogging Tolerance in Soft Red Winter Wheat using Genomic Approaches
… coupled plasma spectroscopy. Yield components kernel number per spike (KNPS), kernel weight per spike (KWS) and thousand kernel weight (TKW) were measured at plant maturity. Negative correlations between TKW and KWS with aluminum and iron concentrations indicated the impact of elemental …
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Association Mapping for Elemental Concentration Resulting from Vegetative Stage Soil Waterlogging Stress in Wheat (Triticum aestivum L.)
… combined effect of decreases in total biomass, kernel-weight per spike and spikes m-2. Strong negative correlations were observed between GY and accumulation of aluminum, iron and sodium, indicating likely elemental toxicity. Cultivars ‘Jamestown’ and ‘USG3555’ were found to be the most tolerant …
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Physiological Traits and Quantitative Trait Loci Associated with Nitrogen Use Efficiency in Soft Red Winter Wheat
… attributable to increased floret fertility and kernel number per spike. The findings from these studies have direct application for winter wheat breeding programs targeting NUE improvements.
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Molecular mapping of quantitative trait loci (QTL) for Fusarium head blight (FHB) resistance and agronomic traits in US hard winter wheat
… the major QTL for HT, HD, spike length (SL), kernel number per spike (KNS), spikelet number per spike (SNS), thousand grain weight (TGW), and grain size. Additional QTL for spike and grain traits were identified on chromosome arms 2AL, 2DS, 3AL and 4BS. G97252W contributed FHB resistance and …
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Discovery of novel regulators and genes in nitrogen utilization pathways in maize
… zap1-mum1 mutant had increased ear weights and kernel number, showing the indirect effect of perturbation of the vegetative transcriptome on sink tissues. Relative to B73, IHP1 is more efficient at taking up and translocating nitrogen and ILP1 exhibits a reduced ability to uptake and remobilize …
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Agronomic management and biostimulants to increase corn and soybean productivity
… the plant population tended to decrease the number of branches per plant. Overall, the results showed that the greatest yield was generated by planting 200,000 plants acre-1, applying AIPGR at both the V5 + R3 growth stages, and applying foliar protection. Enhancing Nitrogen Uptake and Corn …
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Systems Evaluation of Shallow Anhydrous Ammonia Placements, Rates, and Timing on Maize Plant Uniformity, Yield and N Use Efficiency
… more barren plants and increased variation in kernel number and per-plant grain weight were observed than in 2010 and 2012. Conventional tillage generally lowered plant-to-plant variation for most plant parameters measured, and resulted in consistently higher yields than no-till. Plant …