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.
2021
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
The Norwegian newly bred pear cultivar, ‘Celina/QTee®’, which was launched in 2010, has been released from the Norwegian breeding program. It derived from the combination ‘Colourée de Juillet’ × ‘Williams’. In Norway the flowering is medium to late in May and it ripens in the beginning of September. It has large attractive fruits with red blush and good fruit quality, storability and shelf life. Significant areas of ‘Celina’ cultivars are planted in other countries, mainly Europe. Generally, unfavourable environmental conditions for pear pollination during the Nordic spring can have a very negative effect on the yields in Norwegian pear orchards. Therefore, it is of considerable importance to interplant multiple suitable pollinizer genotypes together with the main cultivar. In order to find the right pollinizers besides following biology of fertilization, pollinizing efficacy using microsatellites were studied at NIBIO Ullensvang, western Norway. In this study, during 2017, seeds from fruits of the pear cultivar ‘Celina’ were extracted. The fruits were randomly harvested from five different orchards located in Ullensvang including NIBIO. Alongside the seeds, leaves were taken from the mother cultivar (‘Celina’) and five pear pollinizer cultivars presented in the orchards (‘Fritjof’, ‘Kristina’, ‘Clara Frijs’, ‘Herzogine Elsa’ and ‘Anna’). Using 11 microsatellite markers, a genetic characterization was conducted on both the seeds and the leaves. The obtained SSR profiles were used for gene assignment analyses. The results of the genetic analyses indicate a very heterogeneous situation regarding pollination. In conclusion, ‘Fritjof’, ‘Kristina’, ‘Clara Frijs’, ‘Herzogine Elsa’ and ‘Anna’ pears had different pollen contributions as pollinizers to ‘Celina’ depending on the investigated orchard. Only one cultivar (‘Herzogine Else’) could be singled out as a major pollen contributor in more than two orchards. Genetic analyses will be repeated in the same orchards, during an additional season, after which more conclusive results will be available.
Forfattere
Ming Tian Xinmiao He Yanzhong Feng Wentao Wang Heshu Chen Ming Gong Di Liu Jihong Liu Clarke Andre van EerdeSammendrag
The demand for animal protein has increased considerably worldwide, especially in China, where large numbers of livestock and poultry are produced. Antibiotics have been widely applied to promote growth and prevent diseases. However, the overuse of antibiotics in animal feed has caused serious environmental and health risks, especially the wide spread of antimicrobial resistance (AMR), which seriously affects animal and human health, food safety, ecosystems, and the sustainable future development of animal protein production. Unfortunately, AMR has already become a worldwide challenge, so international cooperation is becoming more important for combatting it. China’s efforts and determination to restrict antibiotic usage through law enforcement and effective management are of significance. In this review, we address the pollution problems of antibiotics; in particular, the AMR in water, soil, and plants caused by livestock and poultry manure in China. The negative impact of widespread and intensive use of antibiotics in livestock production is discussed. To reduce and mitigate AMR problems, we emphasize in this review the development of antibiotic substitutes for the era of antibiotic prohibition.
Forfattere
Ida Marie Bardalen Fløystad Henrik Brøseth Ane-Sofie Bednarczyk Hansen Ingrid Helle Søvik Hans Geir Eiken Snorre HagenSammendrag
Gjennom det nasjonale overvåkingsprogrammet for rovvilt i Norge ble det i 2020 samlet inn prøver til DNA-analyse med antatt opphav fra brunbjørn (Ursus arctos) for tolvte år på rad. Av 1361 innsamlede prøver i 2020, ble 1351 inkludert i den genetiske analysen (850 ekskrementprøver, 489 hårprøver, 10 vevsprøver og 2 urinprøver) og 67 % var positive for brunbjørn. Totalt gav 708 prøver (52 %) en godkjent DNA-profil, og det ble fra disse prøvene påvist 150 ulike brunbjørner; 65 hunnbjørner og 85 hannbjørner. Dette var en økning på 1,4 % (2 individer) sammenlignet med 2019. Dette er det høyeste antallet brunbjørn registrert siden 2011. Forekomsten av brunbjørn var, som i foregående år, hovedsakelig konsentrert i fylkene Troms og Finnmark (66), Innlandet (52) og Trøndelag (29). Av det totale antallet brunbjørner påvist i 2020 var 70 % (105 individer) tidligere påvist i Norge, noe som utgjør en økning i gjenfunn med 4 prosentpoeng i forhold til i fjor. Om man inkluderer gjenfunn fra Sverige, Finland og Russland utgjør det totale antallet gjenfunn 112 individer (75 %). Basert på prøver fra påviste hunnbjørner ble det estimert 8,5 ynglinger i Norge i 2020. Dette er det høyeste estimatet på antall ynglinger siden overvå-kingen startet i 2009. De estimerte ynglingene i 2020 fordeler seg med 3,1 i rovviltregion 5 (Inn-landet), 2,9 i region 6 (Trøndelag) og 2,5 i region 8 (Troms og Finnmark).
Forfattere
Jorunn BørveSammendrag
Det er ikke registrert sammendrag
Forfattere
Jorunn BørveSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag