Journal of Dairy Science
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#1Lukas Smidtas (VSU: Valdosta State University)H-Index: 1
#2AnnaMarie N. Sumner (VSU: Valdosta State University)
Last. Jonghoon Kang (VSU: Valdosta State University)H-Index: 13
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#1Natalie RoadknightH-Index: 1
#2Peter D. MansellH-Index: 17
Last. Andrew D. FisherH-Index: 28
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#1Ruth M. Orellana Rivas (UGA: University of Georgia)H-Index: 2
#2Thalyane Rodrigues (UGA: University of Georgia)H-Index: 1
Last. Sha Tao (UGA: University of Georgia)H-Index: 22
view all 11 authors...
ABSTRACT null null To evaluate the effects of milk replacer (MR) feeding rate (FR) and frequency (FF) on performance, abomasal emptying, and nutrient digestibility in the southeastern United States, Holstein calves (n = 48/season) were enrolled at 8 d of age (DOA) during summer [June to August, body weight (BW; mean ± SD) = 40.71 ± 4.35 kg] and winter (November to January, BW = 42.03 ± 3.83 kg). Within season, calves were randomly assigned to 1 of 4 treatments in a 2 × 2 factorial arrangement in...
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#1Ruth M. Orellana Rivas (UGA: University of Georgia)H-Index: 2
#2Thalyane Rodrigues (UGA: University of Georgia)H-Index: 1
Last. Sha Tao (UGA: University of Georgia)H-Index: 22
view all 11 authors...
ABSTRACT null null The objective of this experiment was to examine the effect of milk replacer (MR) feeding rate (FR) and frequency (FF) on glucose metabolism before and after weaning during summer and winter in the subtropical climate of the southeastern United States. Holstein calves (n = 48/season) were enrolled at 8 d of age (DOA) in the summer (June to August, body weight = 40.6 ± 0.7 kg) and winter (November to January, body weight = 41.9 ± 0.8 kg). In each season, calves were randomly ass...
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#1Rita Couto Serrenho (University of Guelph)H-Index: 3
Last. Todd F. Duffield (University of Guelph)H-Index: 70
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ABSTRACT null null The complex and interrelated management components of dairy farming are associated with health, production, and profitability of the herd, yet there is limited objective data on current management practices of the far-off, close-up, and fresh periods across Canadian dairy farms. We aimed to describe management practices of Canadian dairy farms by using a pre-existing risk assessment tool and outline potential management opportunities. Upon veterinarians' or producers' request,...
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#1Gabriel Machado Dallago (McGill University)H-Index: 2
#2Roger I. Cue (McGill University)H-Index: 20
Last. Elsa Vasseur (McGill University)H-Index: 18
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Studies of dairy cow longevity usually focus on the animal life after first calving, with few studies considering early life conditions and their effects on longevity. The objective was to evaluate the effect of birth conditions routinely collected by Dairy Herd Improvement agencies on offspring longevity measured as length of life and length of productive life. Lactanet provided 712,890 records on offspring born in 5,425 Quebec dairy herds between January 1999 and November 2015 for length of li...
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ABSTACT null null Rennet milk curds were prepared under 4 different temperature and acidity conditions. The development of different types of inter-protein chemical bonds (disulfide, hydrophobic, electrostatic, hydrogen, and calcium bridges) was monitored for 60 min after curd cutting. Hydrophobic inter-protein interactions originally present in casein micelles in milk were substituted by electrostatic, hydrogen, and calcium bonds throughout the curd curing period. Disulfide bonds were not distu...
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#1Charlotte B. ReedH-Index: 2
#2B. Kuhn-SherlockH-Index: 3
Last. Susanne MeierH-Index: 23
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ABSTRACT null null This observational study aimed to determine the effect of genetic merit for fertility traits on estrous expression and estrous cycle duration in grazing dairy cows, as measured by an activity monitoring device. A secondary aim was to describe changes in expression of estrus that occur during successive estrous cycles postpartum. Neck-mounted, activity-monitoring devices (Heatime, SCR Engineers Ltd.) were fitted to nulliparous Holstein-Friesian heifers with positive (POS FertBV...
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#1C.I.V. Manzanilla-Pech (AU: Aarhus University)H-Index: 3
Last. Jan LassenH-Index: 19
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ABSTRACT null null Selecting for lower methane emitting cows requires insight into the most biologically relevant phenotypes for methane emission, which are close to the breeding goal. Several methane phenotypes have been suggested over the last decade. However, the (dis)similarity of their underlying genetic architecture and correlation structures are poorly understood. Therefore, the objective of this study was to test association of SNP and genomic regions through GWAS on 8 CH4 emission trait...
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#1C. Bengtsson (SLU: Swedish University of Agricultural Sciences)
#2Hans StålhammarH-Index: 3
Last. Erling Strandberg (SLU: Swedish University of Agricultural Sciences)H-Index: 42
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In this study, we compared mating allocations in Nordic Red Dairy Cattle using genomic information. We used linear programming to optimize different economic scores within each herd, considering genetic level, semen cost, the economic impact of recessive genetic defects, and genetic relationships. We selected 9,841 genotyped females born in Denmark, Finland, or Sweden in 2019 for mating allocations. We used 2 different pedigree relationship coefficients, the first tracing the pedigree 3 generati...
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