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.
2009
Forfattere
Halvor SolheimSammendrag
Det er ikke registrert sammendrag
Forfattere
Ricardo Holgado Kari Anne Oppen Christer MagnussonSammendrag
Soil samples from a growth depression in potato (Solanum tuberosum) cv. Saturna field in Grue, eastern Norway, yielded large numbers of root lesion nematodes, Pratylenchus penetrans. Yield of potato was reduced by 50% in the affected area of the field. Transect-sampling showed plant growth to be negatively correlated with densities of P. penetrans and suggested a damage threshold of potato to the nematode of 100 specimens per 250 g of soil. Common scab (Streptomyces scabies) occurred frequently in the affected area. Pratylenchus penetrans was present in roots, underground stems, stolons and tubers. In tubers, nematodes were detected inside cross-lesions typical of common scab, and occurred also in the outermost 0.5 mm tissue associated with such lesions. On potato cv. Saturna grown in a green-house, P. penetrans alone induced tuber lesions similar to those of common scab. Also, the combined inoculation of the bacterium and the nematode seemed to enhance symptom expression. Pratylenchus penetrans survives storage of potatoes, from which new infections may develop. Hence, potato tubers do appear to be an important means for the spread of P. penetrans to new areas.
Forfattere
Trond Hofsvang Bonsak HammeraasSammendrag
Det er ikke registrert sammendrag
Forfattere
Åke Olson Mikael Brandström Kajsa Himmelstrand Mårten Lind Magnus Karlsson K. Lunden Kerstin Dalman Heriberto Vélëz Björn Canbäck Francis Martin Halvor Solheim Carl Gunnar Fossdal Pierre Rouzé Yao-Cheng Lin Matteo Garbelotto Ursula Kües Igor V. Grigoriev Andrea Aerts Erika Lindquist Jeremy Schmutz Jan StenlidSammendrag
The genome sequence of the conifer rot root pathogen Heterobasidion annosum was generated at JGI with 8.23 X coverage. The nuclear genome assembles in 39 scaffolds of total 33.7 Mbp estimated to cover 98.1% of the complete genome. We predicted 12,270 genes with an average length of 1,617 bp and exon number and length of 5.54 and 250 bp respectively. About 50% (5999) of the predicted genes could be validated by EST support with the 40,807 EST´s generated with in the project. The genome has a GC content of 52.0% and very little repetitive sequences with 2,895 SSR per mega base. The physical genome is congruent with the genetic linkage map, and most of the linkage groups have been possible to anchor to the 18 largest scaffolds.
Forfattere
Trond Hofsvang Bonsak HammeraasSammendrag
Det er ikke registrert sammendrag
Forfattere
Maria HerreroSammendrag
Det er ikke registrert sammendrag
Forfattere
Trond HofsvangSammendrag
En oversikt over insekter i tegneserier og vitsetegninger.
Forfattere
May-Guri Saethre Trond HofsvangSammendrag
Det er ikke registrert sammendrag
Forfattere
Trond Rafoss Arild SlettenSammendrag
Overvåking og kartlegging av pærebrann ble i 2008 gjort ved hjelp av mobiltelefoner med GPS og en innlagt spesialutviklet programvare. Med enkle tastetrykk på telefonen kunne man registrere i felt forekomster av vertplanter og sjukdomsangrep. Disse dataene ble så via internett over mobilnettet sendt til en digital kart-tjener. Registreringene var umiddelbart tilgjengelige i form av et eget kartlag på internett for visning sammen med annen kartinformasjon på PC. Dette digitale verktøyet har gitt en stor effektivisering og kvalitetsheving av registreringsarbeidet i felt, og gjort dataene umiddelbart tilgjengelige etter innlegging.
Forfattere
Ricardo Holgado Stig Andersson Janet Rowe Ian Clark Christer MagnussonSammendrag
Norwegian cereal cyst nematode populations were studied by biochemical, molecular, morphological and bio test techniques. H. avenae occurred in the pathotypes, Ha11, Ha12, and H. avenae Våxtorp. H. filipjevi was recorded as pathotype West. H. avenae (Ha 11) and H. filipjevi West were the most common species. Thirty barley, 23 oat and 6 of summer wheat cultivars on the Norwegian market were tested for their resistance against H. avenae (Ha11), H. avenae Våxtorp and H. filipjevi West. Resistance against Ha11 was found in 5 barley, 3 oat and in 1 wheat cultivar. Resistance against H. avenae Våxtorp was not present in barley, but 4 oat and 1 wheat cultivar were resistant. For H. filipjevi West resistance was not detected in wheat, but in 6 barley and 13 oat cultivars. A management system based on careful nematode identification and knowledge on resistance of cultivars were set in operation in the county of Vestfold. As a result farmers have improved average yields by 1000 kg /ha. By implementing this program in full the county of Vestfold could make an annual gain of 800 000 €. In perspective of increasing damage from CCN world-wide the correct identification of species and the recognition of their genetic variability is instrumental for successful control.