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.
2023
Abstract
The complete diallel cross is the only mating design that provides estimates of variance components of general combining (GCA), specific combining ability (SCA), maternal and reciprocal effects, in addition to heritabilities and genetic correlations. To obtain such estimates, complete diallels were made among 10 trees in each of three natural Norway spruce populations from altitude 300 and 500 m in Norway. Nursery trials were performed with the families from these crosses and families from seeds collected from open pollination. Traits measured and analysed are seed weight, germination rate, germination percentage, terminal bud set, and seedling heights the first and second years. The seedlings from the population at origin 500 m had lower seed weight, lower heights and earlier bud set than those from the two populations from lower altitude. A considerable variation was present among families within each diallel, and the GCA variance components had the highest values and were significant for most traits. Variance components for SCA and maternal effects were also significant for some traits, but with inconsistent values in the three diallels. A strong relationship was present between the weight of the seed lots from the maternal parent and mean family height after one and two growing seasons. The highest estimate of heritability was observed for bud set, with similar values in all three diallels.
Abstract
The complete diallel cross is the only mating design that provides estimates of variance components of general combining (GCA), specific combining ability (SCA), maternal and reciprocal effects, in addition to heritabilities and genetic correlations. To obtain such estimates, complete diallels were made among 10 trees in each of three natural Norway spruce populations from altitude 300 and 500 m in southern Norway. Seedlings from families from the diallels and open pollinations were tested in short-term tests on agricultural soil at one site at altitude 85 m until age 10 years from seed. Tree height at ages 7 and 10 years and diameter at age 10 had strongly significant GCA variance components within each population. The components for SCA and maternal effects were small and not significant, indicating low levels of non-additive genetic variation. For the days of initiation and cessation of the shoot elongation period the GCA components were dominating and had the highest heritability estimates in two of the diallels. Estimates of genetic correlations between traits measured in earlier nursery trials and height and diameter in the short-term trials had low and not consistent values in the three diallels. The duration of the shoot growth period and rate of growth showed positive relationships with height and diameter. Strong relationships were present between half-sib family means from the diallels and open-pollinated families for height, diameter and phenology traits. Progeny trials testing open-pollinated half-sib families from natural populations can be used for selection of candidates for the initial breeding populations.
Abstract
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Authors
Henriikka Salminen Helena Tukiainen Janne Alahuhta Jan Hjort Karoliina Huusko John Arvid Grytnes Laura Camila Pacheco Riano Jutta Kapfer Risto Virtanen Tuija MaliniemiAbstract
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Authors
Gunnhild SøgaardAbstract
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Authors
Arne SteffenremAbstract
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Authors
Marlee A. Tucker Aafke M. Schipper Tempe S.F. Adams Nina Attias Tal Avgar Natarscha L. Babic Kristin J. Barker Guillaume Bastille-Rousseau Dominik M. Behr Jerrold L. Belant Dean E. Beyer Jr. Niels Blaum J. David Blount Dirk Bockmuhl Ricardo Luiz Pires Boulhosa Michael B. Brown Bayarbaatar Buuveibaatar Francesca Cagnazzi Justin M. Calabrese Rok Cerne Simon Chamaillé-Jammes Aung Nyein Chan Michael J. Chase Yannick Chaval Yvette Chenaux-Ibrahim Seth G. Cherry Dusko Cirovic Emrah Coban Eric K. Cole Laura Conlee Alyson Courtemanch Gabriele Cozzi Sarah C. Davidson Darren DeBloois Nandintsetseg Dejid Vickie DeNicola Arnaud L.J. Desbiez Iain Douglas-Hamilton David Drake Michael Egan Jasper A.J. Eikelboom William F. Fagan Morgan J. Farmer Julian Fennessy Shannon P. Finnegan Christen H. Fleming Bonnie Fournier Nicholas L. Fowler Mariela G. Gantchoff Alexandre Garnier Morten Heim Marco Dietmar Heurich Petra Kaczensky Jonas Kindberg John Durrus Linnell Erling Meisingset Bram Van Moorter Atle Mysterud Manuela Panzacchi Christer Moe Rolandsen Erling Johan Solberg Olav Strand Peter Sunde Nathan J. Svoboda Jonathan Swart Jeffrey J. Thompson Katrina L. Toal Kenneth Uiseb Meredith C. VanAcker Marianela Velilla Tana L. Verzuh Bettina Wachter Brittany L. Wagler Jesse Whittington Martin Wikelski Christopher C. Wilmers George Wittemyer Julie K. Young Filip Zięba Tomasz Zwijacz-Kozica Mark A. J. Huijbregts Thomas MuellerAbstract
COVID-19 lockdowns in early 2020 reduced human mobility, providing an opportunity to disentangle its effects on animals from those of landscape modifications. Using GPS data, we compared movements and road avoidance of 2300 terrestrial mammals (43 species) during the lockdowns to the same period in 2019. Individual responses were variable with no change in average movements or road avoidance behavior, likely due to variable lockdown conditions. However, under strict lockdowns 10-day 95th percentile displacements increased by 73%, suggesting increased landscape permeability. Animals' 1-hour 95th percentile displacements declined by 12% and animals were 36% closer to roads in areas of high human footprint, indicating reduced avoidance during lockdowns. Overall, lockdowns rapidly altered some spatial behaviors, highlighting variable but substantial impacts of human mobility on wildlife worldwide.
Authors
Risto Päivinen Rasmus Astrup Richard A. Birdsey Johannes Breidenbach Jonas Fridman Annika Kangas Pekka E. Kauppi Michael Köhl Kari T. Korhonen Vivian Kvist Johannsen François Morneau Thomas Riedel Klemens Schadauer Iddo K. WernickAbstract
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Authors
Michael Altgen Michael Fröba Julius Gurr Andreas Krause Martin Ohlmeyer Uta Sazama Wim Willems Martin NopensAbstract
No abstract has been registered