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 13 of 13 for “"seed traits"”.
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Ecological significance of seed traits in the genus Macaranga
… niche hypothesis, the transition from seeds to seedlings is critical in determining plant distribution patterns. This initial stage of recruitment may be strongly influenced by seed mass via effects on the sensitivity to light quality and soil moisture availability for germination, and …
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Genetic analysis of agronomic and enological traits in grapevine
… x Tempranillo was studied for14 agronomic traits, 11 enological traits and 5 seed traits for three consecutive years. All traits presented transgressivesegregation and continuous variation. Significant correlations among traits were observed but most associations were weak.Seven groups of …
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The role of seed attributes in eastern gray squirrel foraging
<p>Seed attributes are important predictors of rodent foraging behaviors. I examined the role of seed attributes in eastern gray squirrel (Sciurus carolinensis) foraging behavior from an evolutionary, economic, ecological and biochemical perspective. From an evolutionary perspective (chapter 2), I …
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Wild rice (Zizania Palustris) seed biology: germination under a changing climate
… will impact manoomin/psiɳ germination and how seed traits influence germination and early seedling growth. Specifically, I investigated how differences in winter duration, temperature, and water levels influence overall seed germination and germination rates (time to germination). In addition, …
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Molecular Analyses of the Soybean Glabrous Mutation (P1) and of Transgenic Lines Designed to Modify Seed Composition
… expression of the PDHK gene(s) in soybean seeds specifically by introduction of a PDHK RNAi construct transgenically into soybean. The insertion of the PDHK RNAi construct was confirmed in the soybean sublines by PCR and Southern blot analysis. The dry seeds from the transgenic lines were …
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The Phenotypic Impact of Transgenic Flower Color Variation in Ipomoea quamoclit.
… questions by directly manipulating floral traits at the genetic level, in order to isolate individual traits and examine fitness associated with traits. Pleiotropy is a potentially confounding effect of this approach and must be addressed before genetic engineering may be used as an …
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The natural history, sensory ecology and biogeography of the seed dispersal of large fruits in Fynbos
Seed dispersal is a crucial life-history stage for the regeneration of all reseeding plants. In the Fynbos Biome of the Greater Cape Floristic Region (GCFR) of South Africa, at least 100 plant species have seed traits that suggest they are scatterhoarded by small mammals. The aims of this thesis …
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Morpho-agronomic and genetic variation and segregation patterns of phaseolus vulgaris landraces from selected provinces of South Africa
… for its edible leaves, immature pods, and dried seeds throughout the world. In South Africa, local communities grow a variety of P. vulgaris landraces. Landraces are significant for breeding purposes because they contain important germplasm. However, studies on variation in morphology and …
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Indigenous knowledge, variation in morphology, nutritional composition and genetics of Strychnos spinosa morphotypes
… based on morphological, nutritional, and genetic traits. This also included the first report on the existence of purple, pyriform, and rough fruits, as well as a purple tint on the juvenile leaves. Fruit and seed traits, as well as calcium, phosphorus, magnesium, copper, iron, manganese, fat, acid …
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Restriction fragment length polymorphism mapping of quantitative and qualitative traits in soybean
<p>The purpose of this thesis was to map traits of interest to soybean (Glycine max (L.) Merr.) breeders and geneticists with RFLP markers. The thesis consists of three separate studies;In the first study, quantitative trait loci (QTL) for seed size, protein and oil content and for the content of …
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Essays on innovation in the U.S. corn and soybean seeds
… to innovations in the U.S. corn and soybean seed industries. The three essays study distinct but interrelated themes, including (1) the economic value of seed trait development and an associated extension program, (2) the role of innovation in the context of climate change, (3) environmental …
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Maternal environment affects adaptive seed and seedling traits in Elymus elymoides
… effects of climate change. However, restoration seed needs often outpace the volume of seed that can be collected from the wild, so seeds for many native plant species must be produced in agricultural fields before they are seeded in wild settings. For many of these efforts, agricultural …
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The role of waterbirds in the dispersal of aquatic organisms in southern Africa
… Goose and Red-billed Teal, I explore how seed traits mediate a trade-off in recoverability and germinability against gut retention times. I show that small, hard-seeded species are retained for longer and therefore may be dispersed further. Thirdly, I incorporate gut retention time data …