Die chronologische Liste zeigt aktuelle Veröffentlichungen aus dem Forschungsbetrieb der Hochschule Weihenstephan-Triesdorf. Zuständig ist das Zentrum für Forschung und Wissenstransfer (ZFW).
Dr. Saskia Meier,
Paula Korkuć,
Danny Arends,
Gudrun A. Brockmann
Berechtigungen: Open Access
Berechtigungen: Peer Reviewed
DNA Sequence Variants and Protein Haplotypes of Casein Genes in German Black Pied Cattle (DSN) (2019) Frontiers in Genetics 10 , S. 1-9.
DOI: 10.3389/fgene.2019.01129
Casein proteins were repeatedly examined for protein polymorphisms and frequencies in diverse cattle breeds. The occurrence of casein variants in Holstein Friesian, the leading dairy breed worldwide, is well known. The frequencies of different casein variants in Holstein are likely affected by selection for high milk yield. Compared to Holstein, only little is known about casein variants and their frequencies in German Black Pied cattle (“Deutsches Schwarzbuntes Niederungsrind,” DSN). The DSN population was a main genetic contributor to the current high-yielding Holstein population. The goal of this study was to investigate casein (protein) variants and casein haplotypes in DSN based on the DNA sequence level and to compare these with data from Holstein and other breeds. In the investigated DSN population, we found no variation in the alpha-casein genes CSN1S1 and CSN1S2 and detected only the CSN1S1*B and CSN1S2*A protein variants. For CSN2 and CSN3 genes, non-synonymous single nucleotide polymorphisms leading to three different β and κ protein variants were found, respectively. For β-casein protein variants A1, A2, and I were detected, with CSN2*A1 (82.7%) showing the highest frequency. For κ-casein protein variants A, B, and E were detected in DSN, with the highest frequency of CSN3*A (83.3%). Accordingly, the casein protein haplotype CSN1S1*B-CSN2*A1-CSN1S2*A-CSN3*A (order of genes on BTA6) is the most frequent haplotype in DSN cattle.
Prof. Dr. Bernhard Bauer
Mais: Top Gülleverwerter (2019) Ratgeber Wirtschaftsdünger, Hrsg.: Top agrar , S. 89.
Prof. Dr. Bernhard Bauer
Gülle stabilisiert Erträge (2019) Ratgeber Wirtschaftsdünger, Hrsg.: Top agrar , S. 86-88.
Hans-Jörg Vogel,
Einar Eberhardt,
Uwe Franko,
Birgit Lang,
Prof. Dr. Mareike Ließ,
Ulrich Weller,
Martin Wiesmeier,
Ute Wollschläger
Norbert Bleisteiner,
Stefan Hamberger,
Stefan Bauer,
Markus Heinz,
Tina Steigerwald,
Constantin Seubert,
Prof. Dr. Patrick Noack,
Prof. Dr. Bernhard Bauer
Paula Maas,
Beata Grzegrzółka,
Philipp Georg Kreß,
Martin Oberle,
Prof. Dr. Prisca Kremer-Rücker
Berechtigungen: Peer Reviewed
In vivo – determination of the fat content in mirror carps (Cyprinus carpio) using ultrasound, microwave and linear measurements (2019) Aquaculture 512 .
DOI: 10.1016/j.aquaculture.2019.734359
Carps are the third largest species in aquaculture worldwide and belong to the fish family ‘cyprinids’, which make up the largest part of aquaculture production. The production of lean carp is one of the main goals in the carp farming business. Carps are usually traded alive; in order to ensure product quality and achieve a high consumer acceptance, it is important to estimate the fat content of the living fish. Therefore, during this study, a total of 250 living carps were examined using a mobile ultrasound device. Additionally, a microwave technology based Fish Fatmeter (Distell, Fauldhouse, Scotland, UK) was used to determine the fat content of the living fish. Further measurements included weight, lengths, height and circumferences. The ultrasound measurements were performed on non-sedated fish using narrow water-filled containers. Two sagittal images per fish were taken to measure the backfat thickness at defined locations. Subsequently, the fish were taken out of the water in order to determine the fat content using the Fish Fatmeter. Weight and linear measurements were taken. After the in vivo measurements, about 10 fish per pond, in total 51 fish, were slaughtered and the fillets were analysed chemically. Linear regression models were developed. The Fish Fatmeter turned out to be an accurate method to determine the fat content of the fillet in mirror carps (R2 = 0.95). Regarding the ultrasound measurement of the backfat thickness, moderate correlations between ultrasound and Fish Fatmeter were achieved (R2 = 0.33–0.45). Pearson's correlation for linear measurement and the Fish Fatmeter showed negative prediction. In order to evaluate the relative backfat thickness, the ultrasound measurement was divided by linear measurements. The best correlation was found using the ultrasound measurement point where the backfat thickness reached a constant thickness divided by the circumference around the thinnest part of the tail fin (R2 = 0.74). In the next step, the carps were divided into groups of ten fish per pond. The mean Fish Fatmeter measurement and ultrasound measurement divided by circumference was calculated and correlated achieving an R2 of 0.92. Based on these findings, it seems plausible to estimate the fat content using a small sample of ten fish with an ultrasound device and a measuring tape.
Priv.-Doz. Dr. Dipl.-Ing. Bettina Fähnrich,
Jonas Groß,
J. Brunner,
Prof. Dr. Bernhard Bauer
Interactions of Catch Crops and Their Influence on Yield of Maize and Winter Wheat in Different Crop Rotations (2019) Book of Abstracts, X International Agriculture Symposium AGROSYM 2019, 03.-06.10.2019, Jahorina, Bosnia and Herzegovina , S. 130.
Betreuung der Publikationsseiten
Gerhard Radlmayr
Referent für Wissenstransfer und Forschungskommunikation
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