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.
2014
Forfattere
Stefanos Xenarios Krishna Reddy Kakumanu Nagothu Udaya Sekhar Suresh Reddy KallamSammendrag
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Forfattere
Leif Jarle Asheim Julie Føske Johnsen Øystein Havrevoll Cecilie Marie Mejdell Ann Margaret GrøndahlSammendrag
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Forfattere
Lene Sigsgaard Cyril Naulin Solveig Haukeland Kristian Kristensen Annie Enkegaard Nauja Lisa Jensen Jørgen EilenbergSammendrag
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Forfattere
Leif Sundheim Daniel Flø Trond Rafoss Guro Brodal Åshild Ergon Christer Magnusson Arild Sletten Halvor Solheim May Sæthre Anne Marte Tronsmo Bjørn ØklandSammendrag
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Forfattere
Erik Lysøe Linda J. Harris Sean Walkowiak Rajagopal Subramaniam Hege Divon Even Sannes Riiser Carlos Llorens Toni Gabaldón H. Corby Kistler Wilifred Jonkers Anna-Karin Kolseth Kristian F. Nielsen Ulf Thrane Rasmus J. N. FrandsenSammendrag
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Forfattere
Mari Mette Tollefsrud Yoshiaki Tsuda Jørn Henrik Sønstebø Małgorzata Latałowa Laura Parducci Thomas Källman Jun Chen Vladimir Semerikov Tore Skrøppa Giovanni Guiseppe Vendramin Christoph Sperisen Martin LascouxSammendrag
During the Last Glacial Maximum, the boreal vegetation was greatly restricted. Climatic variation between regions had different impact on the glacial and postglacial history of tree species, resulting in contrasting distribution of genetic diversity. Norway spruce (Picea abies) and Siberian spruce (P. obovata) are two closely related species which parapatric ranges cover almost the entire boreal region of Eurasia; a vast region that experienced contrasting glacial histories. In the present study we combined extensive paleobotanical and genetic data to reconstruct the joint histories of the two species and to evaluate how their glacial and postglacial histories have affected their genetic structure. Today, Norway spruce and Siberian spruce are clearly genetically differentiated in mitochondrial (mt) and nuclear SSR markers, suggesting that the two species had largely independent glacial histories. Nuclear SSR markers indicate the presence of hybrid individuals on both sides of the Urals and east-west longitudinal genetic structures indicate a wide zone of hybridization. The border for mtDNA is situated along the Ob River in Siberia. Along this river and eastwards, latitudinal genetic structures were weak. In Norway spruce, rather complex population genetic structures are revealed as a result of multiple refugia and contrasting recolonization patterns. The current distribution of Norway spruce is divided into a southern and a northern domain. Coherent with the paleodata, both mtDNA and SSR loci suggest a long lasting separation between these two domains, which however, did not preclude secondary contacts. Within the southern domain, mtDNA and paleodata suggest the presence of several refugia, a pattern that nuclear SSR loci fail to reveal probably reflecting pollen mediated gene flow. In the northern domain, the same data support the recolonization of Scandinavia during the mid Holocene from a large and scattered refugium located on the East European Plain. Recolonization took place along different migration routes, and diversity evolved differentially along these routes. The complex genetic structure at nuclear SSRs in the northern Norway spruce domain may be due to gene flow from the southern domain, gene flow from the hybrid zone along the Ural Mountains and expansion from a separate refugium along the Atlantic coast. The latter is suggested by ancient DNA, the presence of a Scandinavia endemic mitochondrial haplotype and possibly, the current structure at SSR loci, where the origin of a distinct genetic cluster in Central Scandinavia remains to be elucidated. The implications of these findings for the response of the boreal forest to climate, forest management and breeding will be discussed.
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Forfattere
Paal KrokeneSammendrag
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