Browsing Doctoral theses (IPV) by Title
Now showing items 18-37 of 39
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Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae) in Benin : its potential as a biological control agent for integrated aphid management in vegetable systems
(PhD Thesis;2013:41, Doctoral thesis, 2013)In Benin, vegetable producers’ reliance on toxic synthetic pesticides threatens the environment and human health. However, the recent discovery of Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae) in ... -
Microdochium nivale in perennial grasses : snow mould resistance, pathogenicity and genetic diversity
(PhD Thesis;2016:32, Doctoral thesis, 2017-07-07)Forage production of perennial grass species in the northern hemisphere is limited by their winter survival ability. The predicted future changes in the environmental conditions constitute both opportunities and challenges ... -
Molecular dissection of the role of plant hormones in perennial shoot branching
(PhD Thesis;2023:17, Doctoral thesis, 2023)Shoot architecture in deciduous trees is determined by the apical meristems and the lateral branching. The formation of above-ground architecture perennials is regulated by a complex spatial-temporal regulation. For decades, ... -
Oat breeding in the era of genomics : resistance against Fusarium
(PhD Thesis;2024:9, Doctoral thesis, 2024)In Norway, oat, along with wheat and barley, constitute one of the three major crops, valued as a break crop due to its minimal disease overlaps with the others. However, a significant threat to the cereal crops, particularly ... -
Partial resistance to Fusarium head blight and powdery mildew in wheat
(PhD Thesis;2011:66, Doctoral thesis, 2011)Both Fusarium head blight and powdery mildew are devastating diseases in wheat growing areas around the world. Breeding for resistance has been undergoing for many decades and mostly depends on phenotypic selection. Marker ... -
Phenotypic and genetic studies of waterlogging tolerance in wheat and barley
(PhD Thesis;2018:50, Doctoral thesis, 2018)Stress caused by waterlogging may have considerable impact on yields of wheat, barley and other crops. As climate change projections include increased precipitation in parts of the world, one can expect an increasing demand ... -
Photosynthesis and growth at high day temperatures in a CO2 enriched atmosphere
(PhD Thesis;2013:75, Doctoral thesis, 2013)Increasing energy prices have led to the attempt of energy saving and are one of the main research areas in greenhouse plant production. Technical disintegration has been developed, and the greenhouse concept ‘Closed/Semi-Closed ... -
The physiological and genetic basis for yield formation and maturation behavior in faba bean (Vicia faba L.) under Norwegian climate
(PhD Thesis;2024:34, Doctoral thesis, 2024)Faba bean (Vicia faba L.) is a cool-season grain legume cultivated as a spring crop at higher latitudes such as the Nordic region, while in more southern regions and subtropical zones, it is grown as a winter or spring ... -
Potato quality during storage: effect of maturity level and ventilation strategies : studies on the storage disease Fusarium dry rot
(PhD Thesis;2016:31, Doctoral thesis, 2017-07-06)Storage losses of Norwegian potatoes are estimated to approximately 10%. The losses are caused by respiration, transpiration, germination and diseases. These are processes that can be managed by controlling storage conditions ... -
Resistance studies and genetic characterization of the barley : Pyrenophora teres pathosystem
(PhD Thesis;2017:52, Doctoral thesis, 2017)Net blotch is a major barley disease in Norway caused by the necrotrophic fungus Pyrenophora teres, which can cause yield losses of up to 40% under conducive conditions. Two forms of this pathogen, P. teres f. teres (Ptt) ... -
Resistance to Septoria nodorum leaf blotch and the importance of sensitivity to necrotrophic effectors in Norwegian spring wheat
(PhD Thesis;2017:63, Doctoral thesis, 2017)Wheat is one of the most important food crops worldwide. In normal years, the proportion of food quality wheat grown in Norway exceeds 50 %. However, the quality and yield can be significantly challenged by unfavorable ... -
Sequencing and mapping of bread wheat chromosome 7B
(PhD Thesis;2014:68, Doctoral thesis, 2014)The rapid development in DNA sequencing technologies in the recent years have led to the sequencing of several large and complex plant genomes including maize. Recently, the International Wheat Genome Sequencing Consortium ... -
Stomatal functioning and abscisic acid (ABA) regulation in plants developed in different air humidity regimes
(PhD Thesis;2013:29, Doctoral thesis, 2013)Greenhouse as a production system is important in the production of vegetables, herbs and ornamental plants. However, plant production in continuous high relative air humidity (RH) may results in poor plant quality, due ... -
Studies on the Collectrichum sublineolum (P. Henn)-Sorghum bicolor (L. Moench) pahosystems in Ethiopia
(PhD Thesis;2010:19, Doctoral thesis, 2010)This thesis covers the assessment of anthracnose incidence and severity in Ethiopia, characterisation of Colletotrichum sublineolum isolates from different sorghum regions of Ethiopia, studying the impact of four selected ... -
A study of freezing tolerance in red clover (Trifolium pratense L.)
(PhD Thesis;2022:36, Doctoral thesis, 2022)The ability to tolerate freezing temperatures is one of the traits that allows successful overwintering of red clover (Trifolium pratense L.) at Nordic latitudes. Freezing tolerance (FT) is enhanced during a period of ... -
The effects of temperature during grain filling on gluten quality of bread wheat (Triticum aestivum L.)
(PhD Thesis;2015:35, Doctoral thesis, 2017-07-06)Wheat production in Norway occurs at the highest latitudes among wheat production areas worldwide, and with lower growth temperature. The proportion of Norwegian wheat in total wheat consumed for food has increased from ... -
Therapeutic horticulture for clinical depression in a Green Care context : prospective studies on mental health benefits, active components and existential issues
(PhD Thesis;2010:28, Doctoral thesis, 2010)Historically, asylums were surrounded by gardens, parks and open landscapes, and patients often participated in horticultural activities. Horticultural therapy and therapeutic horticulture are today widely known therapeutic ... -
Use of supplemental lighting towards efficient management of powdery mildew in greenhouse roses
(PhD Thesis;2009:22, Doctoral thesis, 2010)Powdery mildew caused by the Podosphaera pannosa is one of the most widespread and destructive diseases in roses and has been an increasing problem in Norwegian rose production due to lack of disease resistant cultivars. ... -
Vernalization and photoperiodic regulation of flowering time and population genetic stucture of Norwegian populations of Arabidopsis thaliana
(PhD Thesis;2009:44, Doctoral thesis, 2009)Natural environmental conditions vary across seasons and therefore timing of flowering is a major determinant of plant reproductive success and a trait with a potentially high adaptive value. Plants have developed mechanisms ... -
Winter hardening of Norwegian perennial forage crops in a prolonged growing season
(PhD Thesis;2015:88, Doctoral thesis, 2017-07-06)Current climate change models predict that the temperature increase due to global warming will be greatest at higher northern latitudes. Most probably, temperature will increase more during autumn and winter than summer, ...