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| König, Sven; Jaeger, Maria. |
| Das Forschungsvorhaben 2-Org-Cows sollte aufzeigen, dass auch in bedrohten Rassen zielgerichtete Zuchtarbeit und somit eine Verbesserung der funktionalen Merkmale (Parasitenresistenz, Eutergesundheit, Wiederkäu-, Fress-, Schlaf-, Aktivitäts-Verhalten) möglich ist. Eine effiziente Züchtung impliziert die Durchführung einer Zuchtwertschätzung im BLUP-Tiermodell. Zuchtwertschätzung wiederum ist nur möglich, wenn für die jeweiligen Merkmale hinreichende Erblichkeiten, insbesondere genetische Varianzen, vorliegen. Wesentlich war somit die Installation des Sensorsystems, welches durch eine Vielzahl wiederholter Messungen die Schätzung genetischer Parameter für neue Verhaltensmerkmale ermöglichte. In der doch kleinen Population der bedrohten DSN zeigte sich, dass... |
| Tipo: Report |
Palavras-chave: Beef cattle; Breeding and genetics; Health and welfare. |
| Ano: 2018 |
URL: http://orgprints.org/33786/1/33786-15OE104-uni-giessen-koenig-2018-gesundheitsmanagement-zweinutzungsrinder.pdf |
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| Brügemann, Kerstin; Jaeger, Maria; Ruebesam, Karin; König von Borstel, Uta; König, Sven. |
| Breeding goals of Holstein dairy cattle in New Zealand (NZL) focus on traits reflecting adaptation to pasture-based systems. Due to high prices for concentrates, and advantages for cattle health and welfare, low input grazing systems become important in regions of North-West Germany. The present study addresses the hypothesis that progeny of NZL-Holstein sires are superior in 30 German grassland farms compared to offspring of Holstein sires being progeny tested in German indoor systems. A research design was implemented to create three different genetic groups (F1 generation) within herds on the basis of a German Holstein cow (GHC) population: Group 1=GHC x NZL sires, group 2=GHC x GH sires, group 3=GHC x GH_pasture sires. GH_pasture sires represent bulls... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics; Health and welfare. |
| Ano: 2015 |
URL: http://orgprints.org/29326/1/eaap2015_bruegemann_2708.pdf |
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| Jaeger, Maria; Brügemann, Kerstin; König von Borstel, Uta; Rübesam, Karin; König, Sven. |
| Extract from attached abstract: ... results from the present study do not justify general utilization of HF sires from NZL to improve productivity and functional traits in grassland systems in Germany. Heterogeneous results were found with e.g. advantages for NZL_HF regarding health composites of feet and legs, but in contrast impaired udder health. The broad pool of German Holstein sires should be used to select specific sires for distinct environments and breeding goals, e.g. HF_DEU_P for grassland systems. Furthermore, the present study revealed genetic background for traits that are generally related to cattle husbandry and farm management, e.g. the welfare indicator THS. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics; Health and welfare. |
| Ano: 2015 |
URL: http://orgprints.org/29327/1/Abstract_Jaeger%20Maria_DGfZ2015.pdf |
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| Jaeger, Maria. |
| 2-ORG-COWS aims for an evaluation of novel functional traits and associated environmental descriptors as a prerequisite for both the implementation of organic breeding strategies for local dual-purpose cattle kept in organic pasture based production systems, and for preventive livestock health management. In consequence, the overall objective addresses both adaptation of the dual-purpose cow to pasture based systems, and vice versa adaptation of the system for improving functional (health) traits. Due to this reasons a uniform guide for recording animal welfare (health traits, behavior, fertility), production (milk and meat quality)- and environmental descriptors (feed intake and greenhouse gas emissions) has been developed. |
| Tipo: Teaching resource |
Palavras-chave: Beef cattle; Health and welfare. |
| Ano: 2016 |
URL: http://orgprints.org/30824/1/Guide_ohne_bilder.pdf |
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| Jaeger, Maria; Brügemann, Kerstin; König, S.. |
| The aims of the present study were i) to analyse the genetic structure of the local black and white cattle breed (DSN), and ii) to analyse genotype by environment interactions based on defined herd parameter groups (geographic, environmental, phenotypic descriptors). The study considered 3688 DSN and 3599 HF cows from 46 herds keeping both breeds. Farms mostly reflected pasture based low input production systems. A multiple trait approach, i.e. defining same traits in different clusters as two different traits, was applied to prove genotype by environment interactions based on genetic correlation estimates. Genetic correlations between low heritability functional traits were lower than for production traits. Especially for functional traits such as somatic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Beef cattle; Breeding and genetics. |
| Ano: 2017 |
URL: http://orgprints.org/31802/1/Studien%20zu%20Genotyp-Umwelt-Interaktionen%20beim.pdf |
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