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| Kramer, M.; Erbe, M.; Seefried, F.R.; Gredler, B.; Bapst, B.; Bieber, A.; Simianer, H.. |
| In this study, direct genomic values for the functional traits general temperament, milking temperament, aggressiveness, rank order in herd, milking speed, udder depth, position of labia, and days to first heat in Brown Swiss dairy cattle were estimated based on ∼777,000 (777k) single nucleotide polymorphism (SNP) information from 1,126 animals. Accuracy of direct genomic values was assessed by a 5-fold cross-validation with 10 replicates. Correlations between deregressed proofs and direct genomic values were 0.63 for general temperament, 0.73 for milking temperament, 0.69 for aggressiveness, 0.65 for rank order in herd, 0.69 for milking speed, 0.71 for udder depth, 0.66 for position of labia, and 0.74 for days to first heat. Using the information of... |
| Tipo: Journal paper |
Palavras-chave: Beef cattle; Breeding and genetics. |
| Ano: 2014 |
URL: http://orgprints.org/25080/1/Kramer_2014_Accuracy%20of%20direct%20genomic%20values.pdf |
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| Kramer, M.; Erbe, M.; Bapst, B.; Bieber, A.; Simianer, H.. |
| The aim of this study was to estimate genetic parameters and accuracies of breeding values for milk content traits of individual udder quarters in Brown Swiss cattle. Data of 1,799 phenotyped cows from 40 Swiss dairy herds were analyzed, taking the complete pedigree into account. Fat, protein, lactose, and urea contents, somatic cell score (SCS), and information about hyperkeratosis were available for each udder quarter. The milk of rear udder quarters was found to have significantly higher lactose content and significantly lower fat content than milk of the front udder quarters. The same trend found for fat content was observed for protein content, whereas no differences between the udder quarters were observed for urea content, SCS, or hyperkeratosis.... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2013 |
URL: http://orgprints.org/25079/1/Kramer2013%20invidual%20udder%20quarter.pdf |
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| Bieber, A.; Kramer, M.; Erbe, M.; Bapst, B.; Isensee, A.; Maurer, V.; Simianer, H.. |
| Parameter estimation on low-input dairy shows that it is worthwile to invest into phenotyping of new traits. EBVs based on phenotypes of cows are informative, this might be benefical for integration of genomic data of phenotyped cows into genomic breeding programs. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2013 |
URL: http://orgprints.org/25081/1/Nantes_2013_Abstracts.pdf |
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| Kramer, M.; Erbe, M.; Bapst, B.; Bieber, A.; Simianer, H.. |
| The aim of this study was to estimate genetic parameters and accuracies of breeding values for a set of functional, behavior, and conformation traits in Brown Swiss cattle. These traits were milking speed, udder depth, position of labia, rank order in herd, general temperament, aggressiveness, milking temperament, and days to first heat. Data of 1,799 phenotyped Brown Swiss cows from 40 Swiss dairy herds were analyzed taking the complete pedigree into account. Estimated heritabilities were within the ranges reported in literature, with results at the high end of the reported values for some traits (e.g., milking speed: 0.42±0.06, udder depth: 0.42±0.06), whereas other traits were of low heritability and heritability estimates were of low accuracy (e.g.,... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2013 |
URL: http://orgprints.org/23587/1/kramer-etal-JDS_2013_96_5954.pdf |
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