Sökning: "morphological markers"

Visar resultat 1 - 5 av 115 avhandlingar innehållade orden morphological markers.

  1. 1. Environmental effects on pollen performance:potential consequences on gene flow

    Författare :Margaret Mollel; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant ecology; siring ability; risk assessment; pollen germination; pollen tube growth rate; Nicotiana alata; morphological markers; Cucumis sativus; Genetically modified crops hybridisation; Växtekologi;

    Sammanfattning : This thesis illustrates the effects of environmental factors on pollen performance and its importance on gene flow. Pollen competitive ability between the wild and cultivated species of four genera belonging to Cucurbitaceae family was compared to evaluate the evolutionary potential for selection on pollen tube growth rate. LÄS MER

  3. 2. Effects of Environmental Factors on maternal Choice and Gene Dispersal in Plants

    Författare :Teklehaimanot Haileselassie; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; siring ability; Maternal effect; genetically modified crops; risk assessment; morphological markers; herbivory; Cucumis sativus; Växtekologi; pollen tube growth rate; Plant ecology; Nicotiana alata;

    Sammanfattning : Gene dispersal through pollen is affected by both abiotic and biotic environmental factors. In this study, I mainly investigated the effect of environmental factors: nutrient availability, simulated herbivory and floral morphology (flower colour), on the siring success of competing pollen donors and fitness of the resulting offspring. LÄS MER

  4. 3. Markers of differentiation and prognosis in prostate cancer : a morphological and immunohistochemical study

    Författare :Axel Glaessgen; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Prostate cancer (PCa) is the most common malignancy in men worldwide. The disease shows a wide range of patient outcome between indolent and highly aggressive tumor behavior. Prognostic factors are needed to stratify PCa patients in different prognostic groups for treatment decision and to predict outcome. LÄS MER

  5. 4. Genetic, morphological and chemical variation in the genus Harpagophytum

    Författare :Mbaki Muzila; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Harpagophytum procumbens is a valuable medicinal plant but mistakes with plant identification at harvesting, and wilful adulteration using the presumably less efficient H. zeyheri are suggested. A multidisciplinary study with plant material from Botswana was conducted. LÄS MER

  7. 5. The transience of American Swedish

    Författare :Staffan Klintborg; Engelska; []
    Nyckelord :HUMANIORA; HUMANITIES; transfer; pragmatic markers; nonce-borrowing; markedness; language loss; language death; language attrition; language alternation; divergence; convergence; continuum; contact linguistics; codeswitching; avoidance; American Swedish; automaticity; triggering; English language and literature; Engelska språk och litteratur ;

    Sammanfattning : This thesis concerns two languages in contact: English and Swedish. It is based on interviews with Swedes who came to North America with the last major wave of emigration. LÄS MER