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作者:Bjørg Heringstad , Anne Hege Alm-Kristiansen ...
来源:[J].Acta Veterinaria Scandinavica, 2020, Vol.62 (1), pp.639-653
摘要:Abstract(#br)Background(#br)Oestrous synchronisation of cattle has been widely applied to accomplish simultaneous ovulation in animals and facilitate timed artificial insemination. The main aim of this study was to investigate the ovarian follicular growth and ovulatory resp...
作者:... Erik Ropstad , Bjørg Heringstad , Anne Hege Alm-Kristiansen
来源:[J].Theriogenology(IF 2.082), 2018, Vol.121, pp.181-187
摘要:Abstract(#br)Estrus detection and timing of AI remains a challenge in cattle breeding. Prolonging spermatozoa lifespan after AI, making sperm cells available over an extended period, could make timing of AI relative to ovulation less crucial and improve fertility. Immobiliza...
作者:Bjørg Heringstad , Anne Cathrine Whist ...
来源:[J].Preventive Veterinary Medicine(IF 2.389), 2019, Vol.172
摘要:Abstract(#br)Fully automated on-line analysis equipment is available for analysis of somatic cell count (SCC) at every milking in automatic milking systems. In addition to results from on-line cell counters (OCC), an array of additional cow-level and quarter-level factors conside...
作者:Katrine Haugaard , Bjørg Heringstad
来源:[J].Journal of Dairy Science(IF 2.566), 2015, Vol.98 (2), pp.1321-1324
摘要:Abstract(#br)Heritabilities and genetic correlations were estimated for the 4 most common fertility-related disorders in Norwegian Red: retained placenta, cystic ovaries, silent heat, and metritis. Data on 1,747,500 lactations from 780,114 cows calving from January 2001 through D...
作者:Katrine Haugaard , Morten Svendsen , Bjørg Heringstad
来源:[J].Journal of Dairy Science(IF 2.566), 2015, Vol.98 (7), pp.4928-4933
摘要:Abstract(#br)Our aim was to investigate whether including information from later lactations improves accuracy of genomic breeding values for 4 fertility-related disorders: cystic ovaries, retained placenta, metritis, and silent heat. Data consisted of health records from 6,015,24...
作者:Bjørg Heringstad , Tormod Ådnøy ...
来源:[J].International Dairy Journal(IF 2.333), 2016
摘要:Abstract(#br)Effects of milk protein polymorphism and composition, casein micelle size and salts distribution on the coagulation properties of milk from 99 Norwegian Red cattle (NRF) were studied. Genetic variants of α S1 -casein (CN), β-CN, κ-CN and β-lactoglobulin (LG) aff...
作者:Bjørg Heringstad , Hanne H. Hansen ...
来源:[J].Genetics Selection Evolution, 2016, Vol.48 (1)
摘要:Abstract(#br) Background(#br)Clinical mastitis is an inflammation of the mammary gland and causes significant costs to dairy production. It is unfavourably genetically correlated to milk production, and, thus, knowledge of the mechanisms that underlie these traits would be valuab...
作者:Bjørg Heringstad , Gunnar Klemetsdal ...
来源:[J].Genetics Selection Evolution, 2004, Vol.36 (1)
摘要:Abstract(#br)A Gaussian mixture model with a finite number of components and correlated random effects is described. The ultimate objective is to model somatic cell count information in dairy cattle and to develop criteria for genetic selection against mastitis, an important udde...
作者:... Theo HE Meuwissen , Bjørg Heringstad , Per Madsen
来源:[J].Genetics Selection Evolution, 2010, Vol.42 (1), pp.145-160
摘要:Abstract(#br)Background(#br)In the genetic analysis of binary traits with one observation per animal, animal threshold models frequently give biased heritability estimates. In some cases, this problem can be circumvented by fitting sire- or sire-dam models. However, these models ...

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