Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2004
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Bernt-Håvard ØyenSammendrag
Det er ikke registrert sammendrag
Forfattere
Atle Bones Lars Sandved DalenSammendrag
Genene utgjør en del av gensekvensen på kromosomene, og flere organismer har de siste årene fått sine genom ferdig sekvensert. Gensekvensene ligger lagret i databaser som er tilgjengelig for forskere over hele verden, og arbeidet med å forstå hva alle genene gjør og hvordan de er regulert er allerede i gang. Funksjonell genomforskning kalles dette arbeidet, og norske forskere og norsk industri er med for fullt. Med støtte fra Stortinget og Norges Forskningsråd ble det i fjor opprettet et eget program for funksjonell genomforskning (FUGE). Foreløpig er det bevilget 200 millioner kroner til dette programmet, men etter planen skal det trappes opp til 300 millioner kroner per år over en ti-årsperiode. Gjennom et samarbeid mellom NTNU, UiO og NLH har norske planteforskere fått 30 millioner til studier av det lille, uanselige ugresset vårskrinneblom.
Forfattere
Bernt-Håvard ØyenSammendrag
Det er ikke registrert sammendrag
Forfattere
Jan BjerketvedtSammendrag
Det er ikke registrert sammendrag
Forfattere
Risto Kasanen Jarkko Hantula M. Vourinen Jan Stenlid Halvor Solheim Timo KurkelaSammendrag
Genetic variation in three multiallelic loci was analysed with Temperature Gradient Gel Electrophoresis in order to assess the genetic population structure of Venturia tremulae var. tremulae in order to understand the evolutionary potential of the pathogen against resistance breeding. Also the identification of the fungus was verified with molecular analysis of reference isolates. The Fst and Gst values were very low indicating no substructuring or restrictions to gene flow between Fennoscandian populations of V. tremulae. The results imply high epidemiological efficiency of the fungus and therefore continuous breeding programme should be implemented for Venturia resistance of aspen.
Forfattere
G.T. Slavov G.T. Howe Igor A. Yakovlev K.J. Edwards K.V. Krutovskii G.A. Tuskan J.E. Carlson Steven H. Strauss W.T. AdamsSammendrag
Twenty-two highly variable SSR markers were developed in Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] from five SSR-enriched genomic libraries. Fifteen PCR primer pairs amplified a single codominant locus, while seven primer pairs occasionally amplified two loci. The Mendelian inheritance of all 22 SSRs was confirmed via segregation analyses in several Douglas-fir families. The mean observed heterozygosity and the mean number of alleles per locus were 0.855 (SE=0.020) and 23 (SE=1.6), respectively. Twenty markers were used in genetic linkage analysis and mapped to ten known linkage groups. Because of their high polymorphism and unambiguous phenotypes, 15 single-locus markers were selected as the most suitable for DNA fingerprinting and parentage analysis. Only three SSRs were sufficient to achieve an average probability of exclusion from paternity of 0.998 in a Douglas-fir seed orchard block consisting of 59 parents.
Forfattere
Lars Sandved Dalen H. Danforth J. Einset Carl Gunnar Fossdal Aksel Granhus Øystein Johnsen Harald Kvaalen Nina Elisabeth Nagy P. Rinne Linda Ripel S. Torre Gunnhild Søgaard C. van der SchootSammendrag
Det er ikke registrert sammendrag
Forfattere
Per Otto Flæte Erlend Ystrøm HaartveitSammendrag
Det er ikke registrert sammendrag
Sammendrag
Tall oil is a by-product in pulping of resinous wood by the sulphate process. Tall oil contains a complex mixture of wood extractives. Some of these extractives act as natural protection against wood decaying fungi while other serve as nutrition for the fungi. This report describes a screening of the efficacy of four refined tall oils with different chemical composition on wood decaying fungi.Testing was performed as filter paper assay and mini-block assay. In the filter paper assay growth rates of the white rot fungus Coriolus versicolor and the brown rot fungus Poria placenta were inhibited by the tall oils. None of the oils caused total inhibition of the fungi but there was a clear pattern towards increased efficacy with increased portion of resin acids in the oils.Impregnated mini-blocks with approximately 200 kg/m3 retention of tall oil after leaching showed an evident effect against Coniophora puteana and Poria placenta compared to untreated control samples. However, using the criteria from EN 113 requiring less than 3% mass loss, tall oil failed.The results indicate that decay resistance of tall oil impregnated Scots pine sapwood to the retention level used in this study is comparable with the decay resistance of Scots pine heartwood. It was expected that the efficacy of the tall oils was related to chemical composition of the oils. This was confirmed for the filter paper assay where the efficacy increased with increasing amount of resin acids. However, this pattern was not found for the mini-block assay.The protective effect of the tall oils in wood seems therefore to be more related to their hydrophobic properties than to their fungicidal properties.