|
|
|
| Registros recuperados: 41 | |
|
| |
|
| |
|
| |
|
|
| Hein, Lisa; Buitenhuis, Albert Johannes; Gregersen, Sandra Beyer; Larsen, Lotte Bach; Demirovic, Dino; Warnecke, Solveig; Nielsen, Niels Henning; Munk, Arne; Sørensen, Lars Peter; Pedersen, Jørn; Kargo, Morten. |
| The fatty acid (FA) composition of bovine milk may be related to human health and technological properties of dairy products. The FA composition can be altered both through management and breeding. Large scale FA profiling of the Danish dairy cattle population has now been implemented for more than a year. For the first time access to millions of FA observations across an entire dairy population enables in depth analysis of the factors affecting the FA profile of milk. This was the aim of this study. For 12 months more than 3.5 million milk samples from four Danish dairy breeds had been analyzed using mid infrared spectroscopy and application of FOSS Application Note 64 for predicting content of seven FA groups and four individual FA. The results showed... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle Food security; Food quality and human health Breeding and genetics. |
| Ano: 2016 |
URL: http://orgprints.org/30988/1/Hein_2016_MilkFattyAcidPresentation.pdf |
| |
|
|
| Shetty, Nisha; Janss, Luc; Zaalberg, Roos Marina; Kargo, Morten; Buitenhuis, Albert Johannes. |
| In this paper we present the results of a genome-wide association study to identify significant genes that contribute to genetic variation in abundant milk fatty acids (FAs) C14:0 and C16:0 with considering lactation stage effect. FA composition phenotypes were measured using Application Note 64 (FOSS) and were available on 24,661 milk samples from 3,213 Danish Holstein cows. Association mapping analyses was performed using a Bayesian Variable Selection method. Results showed, in total 21 significant SNPs were detected for C14:0 and 18 significant SNPs were detected for C16:0 that are significant in changing over lactation stage for abundant milk FAs C14:0 and C16:0. For both milk FAs most significant SNPs influencing the slope of the lactation curve were... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2018 |
URL: http://orgprints.org/33142/1/Shetty_2018_GWASMilkFattyAcids.pdf |
| |
|
| |
|
|
| Poulsen, Nina Aagaard; Hein, Lisa; Gregersen, Sandra Beyer; Sørensen, Lars Peter; Larsen, L.B.; Kargo, Morten; Buitenhuis, Albert Johannes. |
| Abstract Milk fatty acid (FA) composition can be manipulated through feeding, and especially effects of grazing have been shown to promote a healthier milk FA profile due to increasing contents of beneficial FAs, like conjugated linoleic acid (CLA) and α-linolenic acid (C18:3, the main n3 FA in milk). In addition to diet-based manipulations, selective breeding for specific FA could also be a strategy for altering the FA profile as milk FA display low to moderate heritabilites (0.07-0.34 in Danish Holstein). Since 2015, milk samples from all Danish dairy cows under yield control have been analyzed using mid infrared spectroscopy. The FOSS Application Note 64 has subsequently been used to predict content of seven FA groups (short-chain FA (SCFA),... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding and genetics; Health and welfare. |
| Ano: 2017 |
URL: http://orgprints.org/32173/1/Poulsen%20et%20al%20SobCows%20poster_2.pdf |
| |
|
| |
|
|
| Slagboom, Margot; Kargo, Morten; Edwards, David; Sørensen, Anders Christian; Thomasen, Jørn Rind; Hjortø, Line. |
| In dairy cattle breeding, breeding goals (BG) are developed and subsequently a selection index that farmers want to use. Therefore it is important to take their preferences for BG traits into account. Two production systems that are expected to influence farmer preferences for BG traits are organic and conventional systems. The aim of this study was to characterize preferences of organic and conventional Danish dairy farmers for improvements in BG traits for Holstein cattle. A survey was established to characterize preferences for improvements in ten traits, by means of pairwise rankings using the online software 1000Minds. These pairwise rankings were based on equal economic worth of trait improvements. The survey was filled in by 106 organic and 290... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding and genetics. |
| Ano: 2016 |
URL: http://orgprints.org/30126/1/Slagboom_2016_BreedingGoalHolsteinPoster.pdf |
| |
|
| |
|
|
| Hjortø, Line; Sørensen, Anders Christian; Thomasen, Jørn Rind; Munk, Arne; Berg, Peer; Kargo, Morten. |
| In this study, we attempt to assess the Danish organic dairy farmers' acceptance of the economic values derived from a stochastic, bio-economic model. We expect the results to show that farmers give increased priority to some traits above the objectively derived economic vaule. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding and genetics. |
| Ano: 2015 |
URL: http://orgprints.org/30099/1/Hjorto_2015_BreedingGoal.pdf |
| |
|
|
| Slagboom, Margot; Kargo, Morten; Edwards, David; Sørensen, Anders Christian; Thomasen, Jørn Rind; Hjortø, Line. |
| The overall aim of this research was to characterize the preferences of Danish dairy farmers for improvements in breeding goal traits. The specific aims were (1) to investigate the presence of heterogeneity in farmers’ preferences by means of cluster analysis, and (2) to associate these clusters with herd characteristics and production systems (organic or conventional). We established a web-based survey to characterize the preferences of farmers for improvements in 10 traits, by means of pairwise rankings. We also collected a considerable number of herd characteristics. Overall, 106 organic farmers and 290 conventional farmers answered the survey, all with Holstein cows. The most preferred trait improvement was cow fertility, and the least preferred was... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2016 |
URL: http://orgprints.org/30362/1/Slagboom_2016_FarmerPreferences.pdf |
| |
|
| |
|
|
| Slagboom, Margot; Wallenbeck, Anna; Rydhmer, Lotta; Thomasen, Jørn Rind; Kargo, Morten. |
| Organic dairy farming (ODF) is different from conventional dairy farming in management practices, but so far the same breeding goal (BG) is used, based on the same economic models (EM). However, ODF is based on the principles of organic agriculture defined by the IFOAM, which are not easily interpreted in economic terms and it may be questionable to use a BG for ODF based on EM. In this study we set up three BGs for ODF in Denmark, one based on the principles of organic agriculture, one focusing on roughage consumption and feed efficiency, and one focusing on disease resistance. A questionnaire and desired gains index were used to set up the BGs. Correlations between these BGs and BGs based on EM were low. Which BG would be best suitable to use for ODF in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2018 |
URL: http://orgprints.org/33030/1/Slagboom_2018_BreedingGoalsForOrganicDairyFarming.pdf |
| |
|
| |
|
| |
|
|
| Cakmakci, Cihan; Jørgensen, Kirstine F.; Kristensen, Troels; Kargo, Morten; Vestergaard, Mogens. |
| The objective of the present study was to compare growth performance of 15 Danish Holstein bull (DHB) calves, 15 Limousine x Danish Holstein crossbred bull (CB) calves and 15 Limousine x Danish Holstein crossbred heifer (CH) calves reared under organic conditions. Spring-born calves were puchased at private farms and arrived at approximately 20 days of age with an average initial body weight of 52.9, 58.5 and 56.1 kg, (SEM 2.6) for DHB, CB and CH, respectively. Calves were kept indoor until weaning at 3 months of age. Calves were gradually introduced to a grass-silage based ration from 3 to 4 months of age. From 4 to 7 months calves were kept on mix grass pasture of ryegrass and white clover. There were significant differences between treatment groups in... |
| Tipo: Working paper |
Palavras-chave: Beef cattle. |
| Ano: 2013 |
URL: http://orgprints.org/24695/3/24695.pdf |
| |
|
| |
|
| |
| Registros recuperados: 41 | |
|
|
|
