Zobrazeno 1 - 10
of 44
pro vyhledávání: '"E, Sehested"'
Publikováno v:
Livestock Science. 167:33-40
The longevity of sows is important for both the production economy and animal welfare. This study suggests that a selection for several conformation traits scored on gilts by utilizing phenotypic records from nucleus herds can contribute to a better
Publikováno v:
Livestock Science. 158:1-11
Ruminants contribute considerably to the Greenhouse Gas (GHG) emissions from agriculture. Genetic improvements have a large potential through permanente and cumulative reductions in emissions. Currently, indirect selection through correlated traits c
Publikováno v:
Acta Agriculturae Scandinavica, Section A — Animal Science. 64:13-22
When developing total merit indices (TMI's), estimated breeding values (EBV's) may be lacking for several traits. Methodology exists to address these challenges, calculating index weights using eco...
Publikováno v:
Livestock Science. 150:80-93
Future production conditions for beef cattle may become increasingly extensive due to human population growth, climate change and competition for resources, which may limit the amount of concentrates available for beef production. Therefore, the effe
Publikováno v:
Livestock Science. 143:259-269
A deterministic bio-economic model was developed to estimate marginal economic values for production and functional traits for intensive (Continental) and extensive (British) breed groups in their typical production systems, and to estimate the relat
Publikováno v:
Animal Reproduction Science. 90:57-71
The effects of four seasons of semen collection and of artificial insemination on conception in dairy cows were studied. The solstices and equinoxes (December, March, June and September) defined the beginning and/or end of each season. Semen was coll
Publikováno v:
Journal of Dairy Science. 91:4437-4439
Correlated selection responses in lactation mean somatic cell score (LSCS) were estimated for groups of cows selected for high protein yield and low mastitis frequency, respectively. Selection for increased milk production resulted in an unfavorable
Quantitative trait loci for clinical mastitis on chromosomes 2, 6, 14 and 20 in Norwegian Red cattle
Autor:
M, Sodeland, M P, Kent, H G, Olsen, M A, Opsal, M, Svendsen, E, Sehested, B J, Hayes, S, Lien
Publikováno v:
Animal genetics. 42(5)
Mastitis is the most frequent and costly disease in dairy production and solutions leading to a reduction in the incidence of mastitis are highly demanded. Here a genome-wide association study was performed to identify polymorphisms affecting suscept
Responses to selection on genotypic or phenotypic values in the presence of genes with major effects
Autor:
I. L. Mao, E. Sehested
Publikováno v:
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 85(4)
Average genotypic responses were compared after selection for genotypic values and for phenotypic values on the basis of single-gene models and multigene models in simulated livestock populations. Single-gene models dealt with single gene control of
Publikováno v:
Acta Veterinaria Scandinavica. 43:49
Ninety ejaculates from a total of 76 AI boars were extended in Beltsville Thawing Solution (BTS). Boar identity, breed, weight of the ejaculate and sperm concentration were registered. Motility and acrosome integrity were assessed after storage at 16