Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2016
Authors
Nicholas Clarke Hugh Cross Toril Drabløs Eldhuset Kjersti Holt Hanssen Ari Hietala O. Janne Kjønaas Holger Lange Jørn-Frode Nordbakken Tonje Økland Ingvald Røsberg Silje SkårAbstract
No abstract has been registered
Abstract
The root rot pathogens in Norway spruce (Picea abies) Heterobasidion ssp. cause substantial loss in carbon sequestered in forest and economic revenue for forest owners. To facilitate strategic breeding planning for increased resistance against this pathogen in particular, the blue stain fungus Endoconidiophora polonica, growth and wood quality traits (wood density and spiral grain), we estimated additive genetic parameters, correlations and the potential response from selection. Parameters were estimated from a progeny trial series established at two sites (25 years from planting) and their parents in a seed orchard (43 years from grafting). A standard half-sib analysis based on progenies and a parent–offspring regression was used for estimation of heritabilities. Resistance against the pathogens was measured as lesion length under bark after inoculations in phloem. Heritability values varied with site and estimation procedure from 0.06 to 0.33, whereas the phenotypic variance (as CV P ) is high and fairly stable around 40–50 %. Heritability values for wood density and spiral grain in the same material varied from 0.32 to 0.63. The highest heritability values were generally obtained from parent–offspring regression. There is no evidence of resistance traits being genetically correlated with growth or wood quality traits. Wood density is negatively correlated with stem diameter. Implications for breeding are discussed.
2015
Authors
Ari Hietala Isabella Børja Hugh Cross Volkmar Timmermann Nina Elisabeth Nagy Halvor Solheim Jørn Henrik Sønstebø adam vivian smithAbstract
No abstract has been registered
Authors
Ari Hietala Isabella Børja Hugh Cross Nina Elisabeth Nagy Halvor Solheim Jørn Henrik Sønstebø Volkmar Timmermann Adam Vivian-SmithAbstract
No abstract has been registered
Authors
Ari Hietala Hugh Cross Isabella Børja Nina Elisabeth Nagy Volkmar Timmermann Halvor Solheim Jørn Henrik Sønstebø Adam Vivian-SmithAbstract
No abstract has been registered
Authors
Ingerd Skow Hofgaard Till Seehusen Heidi Udnes Aamot Jafar Razzaghian Vinh Hong Le Hugh Riley Børge Holen Elisa Gauslaa Hege Særvold Steen Anne-Grete Roer Hjelkrem S.G. Edwards Ruth Dill-Macky Guro BrodalAbstract
No abstract has been registered
Authors
Tor-Einar Skog Berit Nordskog Håvard Eikemo Halvard Hole Annette Folkedal Schjøll Jan Netland Nina Trandem Trond Rafoss Richard MeadowAbstract
No abstract has been registered
Abstract
Pythium species are fungal-like organisms distributed all over the world. Most Pythium spp. live as saprophytes, but some of them are pathogenic. Here we report on disease incidence in Norway spruce (Picea abies) seedlings caused by Pythium undulatum, and pathogenicity in vitro of Norwegian isolates of P. undulatum and P. anandrum.
Authors
Heidi Udnes Aamot Todd J. Ward Guro Brodal Trude Vrålstad Gunnar Bræck Larsen Sonja Klemsdal Abdelhameed Elameen Silvio Uhlig Ingerd Skow HofgaardAbstract
No abstract has been registered
Abstract
No abstract has been registered