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 22 for “"flag leaf"”.
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Capturing Photosynthetic Traits from the Progenitors of Wheat
… linked to the supply and demand components of flag leaf photosynthesis. Two Triticum dicoccoides (AABB) individuals had high rates of flag leaf photosynthesis, driven by enhanced characteristics that facilitated the supply of CO2 to the sites of carboxylation, including high stomatal and …
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Comparative transcriptomics and co-expression networks reveal tissue- and genotype-specific responses of QDTYS to reproductive-stage drought stress in rice (Oryza sativa l.)
… were addressed through RNA-Sequencing the flag-leaf and panicle tissues using a Drought-Tolerant Yield introgression line, DTY-IL, and the recurrent parent Swarna, under moderate reproductive-stage drought stress. Also, RNA-Sequencing analysis was done using the Nipponbare-reference …
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Evaluating Fungicide Timing for Leaf Spot Diseases of Wheat and Fungicide Resistance in Pyrenophora tritici-repentis
… of the most common diseases affecting wheat are leaf spots, caused by several pathogen species that make up the leaf spotting complex, including tan spot of wheat, caused by Pyrenophora tritici-repentis. The optimal timing to apply fungicide to protect wheat against leaf spots is during the flag …
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QTL Mapping of Panicle Architecture and Yield-Related Traits Between Two U.S. Rice Cultivars 'LaGrue' and 'Lemont'
… for plant height, heading date, panicle length, flag leaf length and width, number of primary panicle branches and number of secondary panicle branches. Results from QTL mapping showed two major QTL for plant height co-localized on chromosome 1 that explained a very high amount of phenotypic …
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Agronomic and phenotypic responses to 75 years of recurrent selection for yield in the Iowa Stiff Stalk synthetic maize population
… moisture, test weight, stalk and root lodging, flag leaf angle, anthesis-silking interval(ASI), plant height, tassel branch number, and total number of leaves have been well characterized in comparisons of commercial hybrids representing different eras of hybrid maize production but have yet to …
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The effect of copper stress on inter-trophic relationships in a model tri-trophic food chain.
… in the shoot and ear. The rate of growth and flag leaf length were affected by levels of Cu in the soil but total plant mass and ear weights were not. Wheat shoots and ears were analysed for N (crude protein) P, K and it was found that the levels of Cu in soils affected the levels of protein …
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The effect of non-glaucousness, as conferred by Inhibitor of Wax 1, on physiology and yield of UK Wheat
… spectral properties, were measured. Iw1 reduced flag leaf photosynthetically active radiation (PAR) reflectance by 15-40% and canopy reflectance by 12-20% (p<0.05). Despite this, Iw1 did not affect flag leaf PAR absorbance or canopy temperature, and conferred no advantage under long-term shading. …
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Physiological and agronomic aspects of rice varietal responses to low and high nitrogen management
… between the uptake of N and different leaf characteristics, sink size, and grain yield of three morphologically distinct rice varieties; 2) to examine the CO2 exchange rates (CER) of rice varieties in relation to light, N management, water use efficiencies (WUE), and N use efficiency …
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Comparison of the effects of reducing light intensity after flag leaf emergence in two wheat cultivars, Triticum Aestivum cv. Karamu and Triticum Aestivum cv. Arawa: A dissertation submitted in partial fulfilment of the requirements for the Degree of Bachelor of Agricultural Science (Hons.) in the University of Canterbury
It is known from Fisher's (1973) work that the inflorescence development of Norin 10 derivatives is different from that of standard wheat cultivars. Light is a factor that is important in the development of the inflorescence, so the aim of this experiment is to see if Karamu is more affected by a …
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Disease escape in relation to a trade off between septoria tritici blotch and yield of wheat
… borne transfer from the base of the plant to the flag leaf. This project is on a potential new source of resistance to STB discovered on chromosome 6A using association mapping (Arraiano & Brown 2016). Near isogenic lines generated for this region show no significant differences in STB symptoms …
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Yield Improvement in Eastern Soft Red Winter Wheat from 1919 to 2009
… Red May (1919) and; 2) to determine effects of leaf rust (Puccinia triticina f. sp. tritici) and powdery mildew [Blumeria graminis (DC.) E.O. Speer f. sp. tritici Em. Marchal] on grain yield components and agronomic traits. Replicated yield trials were grown at Warsaw, VA in 2010 and 2011, and …
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The NAM-B1 transcription factor and the control of grain composition in wheat
… tissues, including the grain. In stem and leaf tissues I identified that NAM genes are highly expressed in the vascular bundles, which might be important for nutrient transport. However I did not find evidence for NAM genes altering xylem or phloem transport. I found that in NAM RNAi …
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Single Versus Dual Pesticide Applications for Increasing Oklahoma Winter Wheat Grain Yield and Profitability
… timings, Feekes 6 (jointing) and Feekes 9 (full flag leaf emergence). Two wheat varieties were used in each study, chosen based on susceptibility and resistance to fungal diseases. In the first study which assessed a dual fungicide application approach compared to a single application, results …
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GENETIC MANIPULATION OF CYTOKININ LEVELS IN NEW PLANT TYPE RICE
… with the rate of senescence only in the flag leaf which indicates the importance of the flag leaf in supplying the photo assimilates to the grains. The isopentenyl transferase (ipt) gene, from Agrobacterium-tumeJaciens, is involved in the first rate-limiting step in cytokinin …
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Effect of temperature and daylength on the phenological development of oats (Avena sativa L.)
… at emergence (EM), and the number of visible leaf tips, the length of the emerged leaf laminae, the emergence of the flag leaf ligule (FL), and anthesis (AN) were recorded. On each sampling date five plants per subplot were removed and dissected under a microscope to record the number of …
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Optimising durum wheat yield and quality
… N treatments applied early (tillering) and late (flag leaf emergence) during crop development. At the dryland Darfield site, grain yield increased from 3.5 to 5.5 t/ha following 150 kg N/ha applied at tillering compared with increases from 4.5 to 7.0 t/ha at the irrigated Lincoln site after 175 kg …
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Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-Resistant Corn
… with progressively less in brace roots, ear leaf, anthers, roots, ovaries, silks, stem, flag leaf, and husk, respectively. Greenhouse experiments examined the effect of 112 and 280 g ai/ha of glyphosate applied at various sicklepod growth stages on reproductive development. No treatment …
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Evaluation of physiological traits and identification of QTLs for drought tolerance in hexaploid wheat (Triticum aestivum L.).
… status traits (e.g. osmotic adjustment, RWC and leaf water potential), water soluble carbohydrates (WSC) and carbon isotope discrimination (Δ¹ ³C) were measured during experiments. Through these experiments, the drought responses of the three cultivars were physiologically dissected and the …
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A physiological basis to crop improvement and agronomic development
… correlative relationships of SLA to An, WUEi, leaf N, Δ¹³C, Kh, leaf RWC, and IVD. Additionally, it was observed that IVD may influence WUE and Amax. It was suggested that these relationships of SLA to traits of photosynthesis possibly resulted from the association of SLA and the leaf …
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Food safety through fungal disease and mycotoxin mitigation on dairy farms: From field to feed and the rumen
… collected and separated into leaves, stalks, flag leaf, and cobs. Fresh-cut, WPCS samples were collected at harvest and sealed inside mini-silos for the duration of their respective ensiling times. Brown midrib corn plants had a greater number of green leaves than FLY with 11.81 and 11.34 ± …
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