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 81 for “"Vigour"”.
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Investigating trade-offs in Strength, Skill and Vigour in Pagurus Bernhardus
… of factors including morphology, physiology, vigour <br/>and, more recently, skill. These factors are typically analysed in isolation from <br/>one another, so as to identify the individual impact of each trait. However, to <br/>gain a more comprehensive understanding of RHP we would benefit …
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The genetic determinants of vigour control and precocity by pear (Pyrus communis L.) rootstocks
… means the orchard becomes profitable sooner. Vigour control and precocity are therefore two of the most important traits in commercial pear production. Dwarfing rootstocks are used to reduce the size of the scion and enable precocious flowering in many perennial cultivars. Currently there is a …
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Factors controlling the distribution and spread of bracken (Pteridium Aquilinum) in Scotland
… research into factors controlling the plant's vigour, although there are many anecdotal references on the subject. It is the aim of this thesis to; study the climatic, edaphic and biotic characteristics of the bracken zone; establish the statistical relationship between these factors and …
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Effect of Harvest date on seed quality and potential longevity of two Soyabeans(Glycine max(L.)Merr) Varieties
… of fresh and dried seed, initial seed vigour and accelerated ageing test. Seed was artificially aged at each harvest for varying periods(1,2, 3, 4, 5, 6 and 7 days) after which germination and vigour tests were done. The results showed that variety had significant effect on vigour of …
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Effect of Harvest date on seed quality and potential longevity of two Soyabeans(Glycine max(L.)Merr) Varieties
… of fresh and dried seed, initial seed vigour and accelerated ageing test. Seed was artificially aged at each harvest for varying periods(1,2, 3, 4, 5, 6 and 7 days) after which germination and vigour tests were done. The results showed that variety had significant effect on vigour of …
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An Evaluation of Concepts and Tools for Managing the Northern Hardwoods
… stands, which are based on concepts such as tree vigour, quality, and crown position. However, many of these tools and concepts have not been rigorously evaluated since they were first developed. Further complicating the use and continued development of such tools in the northern hardwoods is the …
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Evaluating long term benefits of genomic selection programs in beef cattle breeding programs in Western Canada
… be repeatable across years. Genomic testing (EnVigour HX™, Delta Genomics, Edmonton, Alberta, Canada) was performed in two years of the six year study. EnVigour HX™ testing provided vigour scores and breed composition of the animals tested. The 2018 heifers from the cooperating producer had an …
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Effect of plant density on soybean seed yield and quality
… had no influence on seed germination, but seed vigour was significantly reduced in both cultivars as plant density increased. This effect became more marked the longer harvest was delayed. Time of harvest also had a significant effect on seed quality, particularly delaying harvest until 14 days …
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Effects of Cereal Cyst Nematode Infection on Resistant and Susceptible Barley
… families, making it seem possible that seedling vigour plays a role in CCN resistance. However, comparisons of seedling vigour between resistant (Rha4+) and susceptible (Rha4-) progeny within advanced generation backcross families revealed no significant differences. It was concluded that the CCN …
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The role of nurse plants in the vegetation dynamics of the succulent Karoo
… changes to a competitive one, since nurse vigour declines as the patient grows larger. Despite this area being arid, a manipulative experimental investigation revealed that competition between the nurse and the patient was not for water. An examination of the rooting patterns of the two …
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PHYSIOLOGICAL CHARACTERIZATION ON SEED AGING OF SIX NATIVE SHRUB SPECIES
… showed a potential in maintaining a higher seed vigour during storage. In the artificial aging experiment, seeds were subjected to 45 oC, 60 % RH for 5-25 d. For most shrub species, the seed viability decreased significantly after 10-15 d artificial aging and was down to 0 % after 20 d. The …
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The effect of carbon dioxide, temperature and water stress on growth, yield and seed quality of sunflower (Helianthus Annuus L.)
… and hulled seed weight, seed germination and vigour (accelerated ageing and electrical conductivity tests). The results from conviron trials revealed that elevated CO2 enhanced growth by increasing the sunflower height in both trials. In terms of yield and seed quality of the progeny seeds, …
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The effect of water stress and storage conditions on seed quality of chickpea genotypes characterized by differences in seed size and coat colour
… and protein accumulation, germination and seed vigour. Pot experiments were conducted under glasshouse / tunnel conditions at the Controlled Environment Facilities (CEF). The experiment for objective 1 was laid out as a single factor in completely randomized design (CRD). Data on emergence rate, …
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Genetic analysis for heat tolerance in tropical maize (zea mays)
… leaves, chlorophyll concentration index (CCI), vigour and plant height. The genotypes P2 (DTS 6,36) x P4 (DTS 6,6) and P4 (DTS 6,6) x P5 (DTS 6,92)were identified as tolerant genotypes. Further analysis showed that parent P4 (DTS 6, 6) and P3 (L5527) were positively and negatively significantly …
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Genetic analysis for heat tolerance in tropical maize (zea mays)
… leaves, chlorophyll concentration index (CCI), vigour and plant height. The genotypes P2 (DTS 6,36) x P4 (DTS 6,6) and P4 (DTS 6,6) x P5 (DTS 6,92)were identified as tolerant genotypes. Further analysis showed that parent P4 (DTS 6, 6) and P3 (L5527) were positively and negatively significantly …
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