Genetic and reproductive advancements in the dairy industry, volatile milk markets, and beef packer restrictions on dairy carcasses have increased the popularity of crossbreeding beef sires to dairy cows in the United States. This observational study aimed to understand performance of dairy cows bred to beef sires and feedlot and carcass performance of crossbred beef × dairy cattle. For dairy cow performance, archived records from two dairies representing two successive lactations were evaluated in cows (Dairy A: = 72/group; Dairy B: = 456/group) representing 1) All Dairy, where previous sire type of conception was Holstein for both lactations, or 2) Beef on Dairy, where previous sire type of conception was Holstein for the preceding lactation and a beef breed for the subsequent lactation. For feedlot performance, closeout data from pens ( = 26/cattle type) of beef and beef × dairy steers and heifers were evaluated. For carcass performance, individual carcass data were compared between conventional beef ( = 966), beef × dairy ( = 518), and Holstein ( = 935) steers sampled across a variety of processing facilities, harvest lots, and geographical regions. Cow lactation performance was minimally impacted by sire type of previous conception. Cows conceived to beef sires exhibited a 2 to 3 d greater ( < 0.01) gestation length than cows conceived to Holstein sires. Beef × dairy cattle were not largely different in weight gain at the feedlot but exhibited 1-unit lesser ( < 0.01) dressing percentage than beef cattle. Beef × dairy carcasses possessed 18% lesser ( < 0.05) 12th rib fat thickness than beef cattle and 5% greater (< 0.05) ribeye area than dairy cattle. Additionally, beef cattle produced nearly double ( < 0.05) the percentage of yield grade 4 carcasses produced by beef × dairy and Holstein cattle.
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http://dx.doi.org/10.1093/tas/txac059 | DOI Listing |
Adv Nutr
January 2025
Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain; Department of Internal Medicine, Institut d'Investigacions Biomèdiques August Pi Sunyer (IDIBAPS), Hospital Clinic, University of Barcelona (UB), Barcelona, Spain; Institut de Recerca en Nutrició i Seguretat Alimentaria (INSA-UB). University of Barcelona, Barcelona, Spain; Fundación Dieta Mediterránea, Barcelona, Spain. Electronic address:
Cardiovascular risk factors begin in childhood and track into adulthood, increasing the possibility of impaired cardiometabolic health. Adopting healthy dietary patterns can help curb childhood obesity, a worrisome epidemic problem at present. In the era of personalized nutrition, dietary recommendations should be adapted to different stages of life, including children (older than 3 years) and adolescents.
View Article and Find Full Text PDFParasite Epidemiol Control
February 2025
Department of Parasitology, Faculty of Veterinary Medicine, Kasetsart University, Lad Yao, Chatuchak, Bangkok 10900, Thailand.
Bovine babesiosis is a tick-borne disease that is caused by apicomplexan protozoan parasite in the genus of infections affect cattle health, reduce milk and meat production and lead to economic losses in tropical and subtropical countries. parasites are difficult to diagnose in the early stage of infections during low parasitemia and asymptomatic conditions led to the lack of treatment and control at the early stage of infection. This study aimed to integrate a molecular tool for the detection and genetic characterization of in small-scale livestock farming in Thailand, and to study the risk factors association with infections in small scale livestock farms in Thailand.
View Article and Find Full Text PDFFront Vet Sci
January 2025
Key Laboratory of Animal Medicine at Southwest Minzu University of Sichuan Province, College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu, China.
Introduction: Bovine coronavirus (BCoV) is an important pathogen of enteric and respiratory disease in cattle, resulting in huge economic losses to the beef and dairy industries worldwide. A specific and sensitive detection assay for BCoV is critical to the early-stage disease prevention and control.
Methods: We established a specific, sensitive, and stable assay for BCoV nucleic acid detection based on CRISPR/Cas13a combined with reverse transcription recombinase-aided amplification (RT-RAA) technology.
Zoonotic transmission of avian influenza viruses into mammals is relatively rare due to anatomical differences in the respiratory tract between species. Recently, clade 2.3.
View Article and Find Full Text PDFJ Anim Sci
January 2025
University of Reading, School of Agriculture, Policy and Development, Earley gate, RG6 6EU Reading, United Kingdom.
This study investigated the effects of different protein sources on feed intake, nutrient, and energy utilization, growth performance, and enteric methane (CH4) emissions in growing beef cattle, also evaluated against a pasture-based diet. Thirty-two Holstein × Angus growing beef were allocated to four dietary treatments: a total mixed ration (TMR) including solvent-extracted soybean meal as the main protein source (SB; n = 8), TMR with local brewers' spent grains (BSG; n = 8), TMR with local field beans (BNS; n = 8), and a diet consisting solely of fresh-cut Italian ryegrass (GRA; n = 8). Every four weeks, animals were moved to digestibility stalls within respiration chambers to measure nutrient intakes, energy and nitrogen (N) utilization, and enteric CH4 emissions.
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