Research Article

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Animals; Cattle; Female; Genome-wide association study; Genotype; Lactation; Longevity; Milk; Quantitative trait loci; Quantitative Trait, Heritable; Reproduction; Selective breeding

In this study, we estimated the genetic parameters and identified the putative quantitative trait loci (QTL) associated with the length of productive life (LPL), days open (DO), and 305-day milk yield for the first lactation (FM305) of crossbred Holstein dairy cattle. Data comprising 4,739 records collected between 1986 and 2004 were used to estimate the variance-covariance components using ... more

P. Saowaphak; M. Duangjinda; S. Plaengkaeo; R. Suwannasing; W. Boonkum
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Animals; Cattle; Female; Gene expression; In Vitro Techniques; Mammary Glands, Animal; Mastitis, Bovine; Milk; Models, Animal; Perfusion; Real-time polymerase chain reaction; Ubiquitin

Intramammary infections are one of the main causes of productivity loss in dairy cows. To better understand the immune system response and to avoid the use of live animals, we validated the use of isolated bovine udder as an ex situ model. Six mammary glands were collected from cows ready for culling. Three udders were perfused with Tyrode's solution and three were not-perfused. During six ... more

I.S.B. Pinto; I. Fonseca; H.M. Brandão; J.C. Gern; A.S. Guimarães; W.A. Carvalho; M.A.V.P. Brito; L.F. Viccini; M.F. Martins
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Animals; Caseins; Cattle; Female; Milk; Polymorphism, Genetic

Several human health problems have been related to the allergenic constitution of bovine milk due to the body's immune reaction to milk proteins. It is necessary find solutions to minimize the occurrence of such reactions, given the importance of milk as a source of animal protein. The aim of this study was to evaluate the allelic frequency of the CSN2 gene and to evaluate differences in the ... more

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The Staphylococcus aureus is the most common isolated microorganism in ruminant animal species diagnostic with clinical or subclinical mastitis. Dairy herds with these diseases can transfer S. aureus into the milk supply, which can lead to food poisoning in humans. The objective of this study was to evaluate the profile of antimicrobial susceptibility, the presence of femA gene, the genetic ... more

A.R.E.O. Xavier; A.C. Almeida; C.N. Souza; L.M.V. Silva; A.X.A. Ruas; D.A. Sanglard; A.F.M. Júnior; A.M.E. Oliveira; M.A.S. Xavier
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Biological rhythms can be defined as changes in physiological or behavioral variables that repeat at certain time intervals. Rhythms that last approximately 24 h are referred to as circadian rhythms. Modern lifestyles have drastically affected human habits, as well as the population's eating habits. These changes have generated an epidemic of metabolic syndromes, such as obesity and diabetes. ... more

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The application of assisted reproductive technology in animal production benefits the economy and conservation of biological resources. Single nucleotide polymorphism (SNPs) was used as predictive markers for breeding and reproduction. In the present study, we examined the association between a SNP of the grb10 gene and superovulation traits in cattle. Sequencing results indicated a point ... more

Y. Wu; Z. Zhang; J.B. Zhang; Q. Deng
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The Red Sindhi cattle breed was imported to Brazil in small numbers. Nowadays, the herds of this breed are distributed in the Northeast, Southeast and Midwest regions of the country. In this study, DNA samples of animals originating from 15 herds in the Northeast and Southeast regions have been analyzed to obtain the ancestry proportions, and to gain a better understanding of the current ... more

J.C.C. Panetto; M.V.G.B. Silva; R.M.H. Leite; M.A. Machado; F.A.T. Bruneli; D.R.L. Reis; M.G.C.D. Peixoto; R.S. Verneque
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Fertility traits, such as heifer pregnancy, are economically important in cattle production systems, and are therefore, used in genetic selection programs. The aim of this study was to identify single nucleotide polymorphisms (SNPs) using RNA-sequencing (RNA-Seq) data from ovary, uterus, endometrium, pituitary gland, hypothalamus, liver, longissimus dorsi muscle, and adipose tissue in 62 ... more

M.M. Dias; A. Cánovas; C. Mantilla-Rojas; D.G. Riley; P. Luna-Nevarez; S.J. Coleman; S.E. Speidel; R.M. Enns; A. Islas-Trejo; J.F. Medrano; S.S. Moore; M.R.S. Fortes; L.T. Nguyen; B. Venus; I.S.D.P. Diaz; F.R.P. Souza; L.F.S. Fonseca; F. Baldi; L.G. Albuquerque; M.G. Thomas; H.N. Oliveira
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Animals; Bayes Theorem; Body weight; Cattle; Female; male; maternal inheritance; Quantitative Trait, Heritable; Selective breeding

This study was carried out to investigate (co)variance components and genetic parameters for growth traits in beef cattle using a multi-trait model by Bayesian methods. Genetic and residual (co)variances and parameters were estimated for weights at standard ages of 120 (W120), 210 (W210), 365 (W365), and 450 days (W450), and for pre- and post-weaning daily weight gain (preWWG and postWWG) in ... more

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Animals; Astragalus propinquus; Biomarkers; Bone Density; Disease Models, Animal; Dose-Response Relationship, Drug; Drugs, Chinese Herbal; Female; Humans; Mice; Osteoporosis, Postmenopausal; Ovariectomy; Polysaccharides; Random Allocation; Signal transduction

Postmenopausal osteoporosis, a common type of osteoporosis in women, has become a serious public health issue. Astragalus polysaccharides (APS), possessing various pharmacological activities, are the active ingredients of Radix Astragali. It can be advantageous in the treatment of postmenopausal osteoporosis. In the present study, we evaluated the potential therapeutic effects of APS on ... more

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