Jukuri

Tervetuloa käyttämään Jukuria, Luonnonvarakeskuksen (Luke) avointa julkaisuarkistoa. Jukurissa on tiedot Luken julkaisutuotannosta. Osa julkaisuista on vapaasti ladattavissa. Luken muodostaneiden tutkimuslaitosten aikaisemmasta julkaisutuotannosta osan tiedot ovat järjestelmässä jo nyt ja kattavuus paranee jatkuvasti.

Kokoelmat

Näytetään 1 - 2 / 2

Viimeksi tallennetut

Chemical modification of cellulose under homogeneous reaction conditions
Dryś, Magdalena
Dissertationes Universitatis Helsingiensis : 236/2026 (Helsingin yliopisto, 2026)
Soil carbon stabilization in northern ecosystems
Tyvijärvi, Anne
Dissertationes Universitatis Helsingiensis : 221/2026 (Helsingin yliopisto, 2026)
Bayesian integrated population model of Baltic grey seals (Halichoerus grypus grypus) informs on population carrying capacity and the impact of Baltic herring (Clupea harengus membras) on reproduction
Vanko, Milena; Helle, Inari; Kunnasranta, Mervi; Ahola, Markus P.; Bäcklin, Britt-Marie; Carlsson, Anja M.; Cervin, Linnea; Persson, Sara; Vanhatalo, Jarno
Ecological modelling (Elsevier, 2026)
Baltic grey seal (Halichoerus grypus grypus) is a top predator of the Baltic Sea ecosystem that has just recently recovered from near-extinction induced by historical bounty hunting and pesticides. However, increasing seal population has initiated a conflict between seal conservation and fisheries. We also lack understanding of the ecological constraints of grey seal population in the rapidly chancing Baltic Sea. To address these challenges, we developed a Bayesian integrated population model for the Baltic grey seals. We used our model to estimate their historical population development, demography, and life history parameters, and to assess their future prospects under alternative hunting and prey scenarios. Our results show that the grey seal population has recovered to approximately 57,000 seals in 2025, with an average yearly growth rate of 4.9% in the last two decades. The current carrying capacity of Baltic grey seals was estimated at 120,000 individuals, which is 30% larger than previous estimates from historical hunting statistics. The weight-at-age of Baltic herring (Clupea harengus membras) was found to have a strongly positive effect on grey seal reproduction. Scenario predictions suggest that the Baltic grey seal population can remain viable under the current hunting quota of 3050 individuals. However, with yearly hunting of 3600 individuals, probability of extinction was considerable, and depended on both prey quality and the demographic composition of the hunted seals. With yearly harvest of 4800 seals, the population was predicted to go extinct by 2070 at the latest.
Rethinking gene editing impact in plant breeding as measured by genetic gain
Khazaei, Hamid; Ortiz, Rodomiro
Food security (Springer Nature, 2026)
Gene editing (GEd) has transformed the ability to precisely modify plant genomes, offering new opportunities for plant breeding over the past decade. Despite rapid advances in GEd technology, its measurable impact on realised genetic gain in plant breeding programmes remains unknown. This gap reflects a mismatch between editing capability and the biological, operational, and regulatory realities of plant breeding, rather than evidence of technology‑related limitations or poor field performance of gene‑edited crops. We discuss key constraints of GEd, including genotype-dependent transformation, the multigenic nature of most agronomic traits in crops, integration into plant breeding pipelines, and regulatory and societal considerations. Framing GEd within a systems-level plant breeding framework that integrates selection strategies, speed breeding, advanced editing methods, and access to diverse germplasm provides a realistic pathway to accelerate genetic gain.
Global analysis of bovine milk protein variants using multi-breed DNA sequence data
Liu, Ying; Bijl, Etske; Gao, Junxin; Gonzalez-Prendes, Rayner; Groenen, Martien A. M.; Kantanen, Juha; Ginja, Catarina; Ghanem, Nasser; Kugonza, Donald Rugira; Makgahlela, Mahlako; Bovenhuis, Henk; Crooijmans, Richard P. M. A.
Bmc genomics : 1 (BioMed Central, 2026)
Background To date, 63 variants of six major bovine milk proteins (αS1-CN, β-CN, αS2-CN, κ-CN, α-LA, and β-LG) have been described. These variants are caused by changes in the amino acid sequence of the mature protein, primarily resulting from missense variations in the exons of genes or splice sites. Several of these variants are known to be associated with milk production traits, cheese-processing properties, and the nutritional value of milk. In the past, milk protein variants have been identified in a limited number of breeds, especially in dairy cattle. The objective of this study was to investigate variation in milk proteins in a large number of cattle breeds based on whole genome sequencing data. Results We investigated variants of the six major milk proteins in 3,824 cattle representing 113 breeds with wide geographical distribution using whole genome sequencing data. 59 missense variants of milk protein genes that can alter the amino acid sequence of the mature protein were detected. Notably, 10 out of 11 missense variants in CSN3 were located within the region coding for the glyco-macropeptide, whereas the para-κ-casein region involved in micelle stabilization remained highly conserved with only one variant detected, suggesting functional constraint in this region. A total of 121 milk protein variants were identified based on different combinations of the 59 missense variants, of which 35 had been described previously. We detected 86 novel variants that had not been reported previously. These protein variants were likely missed in earlier studies due to technical limitations or the use of limited number of animals or breeds. Conclusion This study provides a comprehensive overview of milk protein diversity across global cattle breeds, offering valuable insights for improving milk quality and properties, guiding selective breeding and prioritizing variants for future functional investigation in the dairy sector.