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.
2024
Abstract
Forest tree seed orchards are artificial populations of genetically superior individuals that play a crucial role in the production of high-quality seeds for reforestation and afforestation programs worldwide. In the pre-genetic-marker era, seed orchards were assumed to act as closed, panmictic populations with equal reproductive success among parents and with no gene flow from external pollen sources. Meeting these assumptions would ensure that the genetic gain attained by breeding would be efficiently transmitted to the next generation, i.e., into seed orchard crops. Many studies published to date have shown that parental reproductive success may be highly variable and that gene flow from undesired pollen sources, a.k.a. pollen contamination, can be substantial. Since the realized genetic gain can be considerably reduced, it is important to monitor mating patterns in seed orchards and thereby control the genetic quality (gain and diversity) of their crops. With the development of genetic markers, the theoretical assumptions as well as the efficiency of measures proposed to enhance desired crosses and reduce pollen contamination in seed orchards could be verified. First attempts to unravel mating patterns and quantify pollen contamination in seed orchards date back to the late 1970s when allozyme markers were introduced. Allozymes remained in use for over two decades, but due to their low resolution, they were gradually replaced with much more powerful microsatellites (SSRs), which, along with the rapid evolution of various statistical approaches, were capable of providing a much more detailed picture of seed orchards’ mating dynamics through pedigree reconstruction. Recently, SNP arrays that have been (and are being) developed for a number of commercially important forest tree species make it possible to affordably and rapidly screen seed orchard seed lots and evaluate the orchards’ genetic efficiency.
Authors
Mika Helene Kirkhus Håvard Kauserud Vigdis Vandvik Ella Thoen Ane Vollsnes Aud Helen Halbritter RechsteinerAbstract
The boreal, alpine, and arctic heaths and forests are dominated by dwarf-shrubs along with their symbionts, ericoid mycorrhizal fungi. Dwarf-shrubs are sensitive to climate change and are already affected in large-scale diebacks. It remains to explore how their mycorrhizal symbionts mitigate damages, since little is known about these plant-fungal interactions. Ericoid mycorrhizal fungi are known to aid the host plant with nutrient uptake, but little research exists on their dealings with drought, suggesting a major knowledge gap. A better overview of belowground ericoid fungi at different drought levels might help predict future climate-change induced damage. In our study we aim to find out if and how drought affects ericoid mycorrhizal fungal communities, and pinpoint key species related to drought mitigation.
Authors
Mika Helene Kirkhus Håvard Kauserud Vigdis Vandvik Ella Thoen Ane Vollsnes Aud Helen Halbritter RechsteinerAbstract
The boreal, alpine, and arctic heaths and forests are dominated by dwarf-shrubs along with their symbionts, ericoid mycorrhizal fungi. Dwarf-shrubs are sensitive to climate change and are already affected in large-scale diebacks. It remains to explore how their mycorrhizal symbionts mitigate damages, since little is known about these plant-fungal interactions. Ericoid mycorrhizal fungi are known to aid the host plant with nutrient uptake, but little research exists on their dealings with drought, suggesting a major knowledge gap. A better overview of belowground ericoid fungi at different drought levels might help predict future climate-change induced damage. In our study we aim to find out if and how drought affects ericoid mycorrhizal fungal communities, and pinpoint key species related to drought mitigation.
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Authors
Debojyoti Chakraborty Albert Ciceu Dalibor Ballian Marta Benito Garzón Andreas Bolte Gregor Bozic Rafael Buchacher Jaroslav Čepl Eva Cremer Alexis Ducousso Julian Gaviria Jan Peter George André Hardtke Mladen Ivankovic Marcin Klisz Jan Kowalczyk Antoine Kremer Milan Lstibůrek Roman Longauer Georgeta Mihai László Nagy Krasimira Petkova Emil Popov Randolf Schirmer Tore Skrøppa Thomas Solvin Arne Steffenrem Jan Stejskal Srdjan Stojnic Katharina Volmer Silvio SchuelerAbstract
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Authors
Tor MykingAbstract
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Authors
Aline Fugeray-Scarbel Laurent Bouffier Stéphane Lemarié Leopoldo Sánchez Ricardo Alia Chiara Biselli Joukje Buiteveld Andrea Carra Luigi Cattivelli Arnaud Dowkiw Luis Fontes Agostino Fricano Jean-Marc Gion Jacqueline Grima-Pettenati Andreas Helmersson Francisco Lario Luis Leal Sven Mutke Giuseppe Nervo Torgny Persson Laura Rosso Marinus JM Smulders Arne Steffenrem Lorenzo Vietto Matti HaapanenAbstract
No abstract has been registered