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 9 of 9 for “"flower colour"”.
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Evolutionary genetics and genomics of flower colour loci in an Antirrhinum hybrid zone
… in a linked cluster of loci responsible for a flower colour polymorphism between two A. majus subspecies are maintained despite recombination in a hybrid zone. I reveal that a known locus that controls the magenta flower colour of the subspecies, ROSEA (ROS), is highly divergent between them, …
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Intraspecific variation in Erica coccinea
… to variability in floral characteristics such as colour, this species includes two distinct regeneration forms: a resprouter form which survives fire by resprouting from dormant buds in a swollen lignotuber, and a seeder form which does not survive fire, but whose populations regenerate from …
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The Reproductive biology of Erica pudens
… habit, found close to the floor, with a dull flower colour and winter flowering times. This research also found that E. pudens offers a high volume of nectar per floral head (up to 20.9μl) with a comparably high sugar concentration (23.7%). Even though these characteristics suggested …
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Moth pollination, low seed set, and vestigialization of attractive floral traits in Abronia umbellata (Nyctaginaceae)
Flowering plants display remarkable phenotypic diversity, especially in reproductive structures, much of which is thought to be associated with pollination by animals. Pollination syndromes are collections of floral traits (e.g. flower colour, shape, odour) that are associated with a plant …
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Verbena L., Glandularia Gmel., Junellia Moldenke, Lantana L. und Lippia L. (Verbenaceae) in Peru
… constructed of simple or branched spikes. The flowers have pentamerous fused calyces, with hypocrateriform, or sometimes cylindrical, five-lobed corollas. The ovary is bilocular, possessing an additional false septum forming four elongated nutlets. The second group has only woody members and, …
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Petals, pigments and pollinator preferences
… significant variation between varieties in flower size and shape. In our bee behaviour laboratory, I have used plastic artificial ‘flowers’ and lab colonies of bumblebees to test bee responses to the limits of observed variation in shape, in terms of recognition and finding speed, and found …
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Behavioural, microhabitat, and phylogenetic dimensions of intrasexual contest competition in combatant monkey beetles (Scarabaeidae: Hopliini)
… wrestling and pushing between two males on the flower heads occupied by embedded, feeding females, who apparently exert no mate choice. Contest outcomes are influenced by hind femur size and residency effects, and I apply hypotheses informed by evolutionary game theory to assess how males make …
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Understanding the development, evolution, and function of bullseye pigmentation patterns in Hibiscus trionum
Colourful spot, stripe and ring patterns decorate the corolla of many flowering plants and fulfil important biotic and abiotic functions. These petal patterns are created by spatial differences in pigmentation, cell shape and texture of the adaxial petal epidermis. The mechanisms controlling …
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Characterization and potential for the genetic improvement of pigeonpea (cajanus cajan ) landraces
… traits such as the branching pattern, stem colour, flower colour, pod colour and testa colour were recorded. The quantitative traits that were recorded included plant height at flowering (PHF), number of primary branches (NPB), number of secondary branches (NSB), number of seeds per pod …