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https://www.readbyqxmd.com/read/28823122/genetic-analysis-of-milk-production-traits-of-tunisian-holsteins-using-random-regression-test-day-model-with-legendre-polynomials
#1
Hafedh Ben Zaabza, Abderrahmen Ben Gara, Boulbaba Rekik
Objective: The objective of this study was to estimate genetic parameters of milk, fat, and protein yields within and across lactations in Tunisian Holsteins using a random regression test-day model. Methods: A random regression multiple trait multiple lactation test-day (TD) model was used to estimate genetic parameters in the Tunisian dairy cattle population. Data were TD yields of milk, fat, and protein from the first three lactations. Random regressions were modeled with third-order Legendre polynomials for the additive genetic, and permanent environment effects...
August 16, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28823069/current-status-of-cattle-production-system-in-nyagatare-district-rwanda
#2
Eugene Mazimpaka, Francis Mbuza, Tukei Michael, Eugene N Gatari, E M Bukenya, Okwee-Acai James
A study was conducted to characterize the cattle production systems in Nyagatare District, Eastern Province of Rwanda using pre-tested questionnaires, interviews with key informants as well as focus group discussions in a period of 2 months. The respondents were selected by multi-stage sampling at sector and cell levels. Based on the procedure of Krejcie and Morgan (Educational and Psychological Measurement 30:607-610, 1970) to determine the overall sample size, the result indicated that the majority (98.3%) of farms were privately owned by large families of five to seven members, and most farmers (53...
August 19, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28822951/effect-of-deflocculation-on-photo-induced-thin-layer-titanium-dioxide-disintegration-of-dairy-waste-activated-sludge-for-cost-and-energy-efficient-methane-production
#3
V Godvin Sharmila, P Dhanalakshmi, J Rajesh Banu, S Kavitha, M Gunasekaran
In the present study, the deflocculated sludge was disintegrated through thin layer immobilized titanium dioxide (TiO2) as photocatalyst under solar irradiation. The deflocculation of sludge was carried out by 0.05g/g SS of sodium citrate aiming to facilitate more surface area for subsequent TiO2 mediated disintegration. The proposed mode of disintegration was investigated by varying TiO2 dosage, pH and time. The maximum COD solubilization of 18.4% was obtained in the optimum 0.4g/L of TiO2 dosage with 5.5 pH and exposure time of 40min...
August 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28822904/the-effect-of-age-and-length-of-gonadotropin-stimulation-on-the-in%C3%A2-vitro-embryo-development-of-holstein-calf-oocytes
#4
Luke Currin, Laura Michalovic, Anne-Marie Bellefleur, Karina Gutierrez, Werner Glanzner, Yasmin Schuermann, Rodrigo C Bohrer, Naomi Dicks, Paulo R da Rosa, Matheus P De Cesaro, Rosalba Lopez, François-Xavier Grand, Christian Vigneault, Patrick Blondin, Jim Gourdon, Hernan Baldassarre, Vilceu Bordignon
The use of oocytes recovered from prepubertal donors for in vitro embryo production has great potential for accelerating the rate of genetic gain in the dairy industry. However, these oocytes are known to be less developmentally competent than those from adult donors. In this study, we investigated the effect of age and gonadotropin stimulation in Holstein heifers subjected to oocyte collection every two weeks between 2 and 6 months of age. In order to assess the effect of gonadotropin stimulation, animals were subjected to one of three treatments, namely Short (ST; 36-42 h), Long (LT; ≥72 h) and No Treatment (NT) prior to laparoscopic ovum pick-up (LOPU)...
August 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/28822553/vitamin-d-status-in-growing-dairy-goats-and-sheep-influence-of-ultraviolet-b-radiation-on-bone-metabolism-and-calcium-homeostasis
#5
M V Nemeth, M R Wilkens, A Liesegang
The aim of this study was to investigate how controlled UVB irradiation in combination with reduced nutritional vitamin D (vitD) supply affects vitD status and Ca metabolism of growing goats and sheep. The hypothesis was that, like dairy cows, goats and sheep are able to compensate for the missing nutritional supply of vitD through endogenous production in the skin, with the consequence of a high vitD status and a balanced Ca homeostasis. Sixteen lambs and 14 goat kids aged 3 and a half months were housed in an UVB free environment and fed hay and a vitD-free concentrate over a period of 13 wk...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822551/disruption-of-staphylococcus-aureus-biofilms-using-rhamnolipid-biosurfactants
#6
S S E Silva, J W P Carvalho, C P Aires, M Nitschke
Staphylococcus aureus is an important pathogen that has shown ability to establish biofilm communities that can represent a source of contamination and resistance in food processing. Rhamnolipids (RL) have attracted attention as candidates to replace synthetic surfactants, exhibiting high surface activity combined with its microbial origin, biodegradability, and low toxicity. In this work, an RL biosurfactant was evaluated regarding its ability to disrupt or remove S. aureus biofilms established on polystyrene plates using nutrient broth and skim milk as the growth media...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822550/technical-note-reduced-pulsation-chamber-vacuum-at-normal-pulsation-rate-and-ratio-provides-adequate-prestimulation-to-induce-oxytocin-release-and-milk-ejection-while-simultaneous-milk-flow-is-prevented
#7
Anna-Lena Neuheuser, Claire Belo, Rupert M Bruckmaier
In the present study we investigated the milking characteristics and the oxytocin release in dairy cows milked after either manual prestimulation or a premilking period with pulsating liners at normal pulsation rate (60) and ratio (60:40) while the pulsation chamber vacuum (PCV) was reduced to 20 kPa to prevent the opening of the liners. During the milking trial with 8 cows the PCV reduction was started either before attachment (PCV-1) or immediately after attachment (PCV-2) of the teat cups. Milk yields, total milking times, average milk flows, peak flow rates, the duration of milk flow plateaus, and the duration of milk flow declines did not differ among the 3 treatments...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822549/effect-of-substituting-soybean-meal-and-canola-cake-with-grain-based-dried-distillers-grains-with-solubles-as-a-protein-source-on-feed-intake-milk-production-and-milk-quality-in-dairy-cows
#8
C Gaillard, M T Sørensen, M Vestergaard, M R Weisbjerg, A Basar, M K Larsen, H Martinussen, U Kidmose, J Sehested
The growth of the bioethanol industry is leading to an increase in the production of coproducts such as dried distillers grains with solubles (DDGS). Both corn-based DDGS and grain-based DDGS (gDDGS; defined as originating from grain sources such as barley, wheat, triticale, or a mix, excluding corn) appear to be relevant sources of feed and protein for dairy cows. To date, most of the studies investigating DDGS have been performed with corn-based DDGS. The objectives of this study were to determine the effects of the proportion of gDDGS in the diet on feed intake, milk production, and milk quality...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822548/short-communication-verifying-holstein-heifer-heart-girth-to-body-weight-prediction-equations
#9
A J Heinrichs, B S Heinrichs, C M Jones, P S Erickson, K F Kalscheur, T D Nennich, B J Heins, F C Cardoso
The estimation of Holstein heifer body weight (BW) from heart girth measurements is needed, as many farms do not have animal scales to make the management decisions that require BW. The correlation between heart girth and BW is known to vary with differing animal conformation. The previous equation to correlate the 2 measures for Holstein dairy heifers was done 25 yr ago. Data were derived from 6 US experiment stations that are part of Regional Research Project NC-2042: Management Systems to Improve the Economic and Environmental Sustainability of Dairy Enterprises...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822546/genetic-evaluation-of-claw-health-traits-accounting-for-potential-preselection-of-cows-to-be-trimmed
#10
Iola Croué, Freddy Fikse, Kjell Johansson, Emma Carlén, Gilles Thomas, Hélène Leclerc, Vincent Ducrocq
Claw lesions are one of the most important health issues in dairy cattle. Although the frequency of claw lesions depends greatly on herd management, the frequency can be lowered through genetic selection. A genetic evaluation could be developed based on trimming records collected by claw trimmers; however, not all cows present in a herd are usually selected by the breeder to be trimmed. The objectives of this study were to investigate the importance of the preselection of cows for trimming, to account for this preselection, and to estimate genetic parameters of claw health traits...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822545/effects-of-the-dose-and-viability-of-saccharomyces-cerevisiae-2-ruminal-fermentation-performance-of-lactating-dairy-cows-and-correlations-between-ruminal-bacteria-abundance-and-performance-measures
#11
Y Jiang, I M Ogunade, K G Arriola, M Qi, D Vyas, C R Staples, A T Adesogan
This study examined effects of the dose and viability of supplemented Saccharomyces cerevisiae yeast strain YE1496 on ruminal fermentation and performance of lactating dairy cows. A second objective was to examine correlations between ruminal bacteria abundance and performance measures. Four ruminally cannulated lactating cows (284 ± 18 days in milk) were assigned randomly to 1 of 4 treatment sequences in a 4 × 4 Latin square experimental design using four 21-d experimental periods. Cows were fed a nonacidotic total mixed ration comprising 22...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822544/performance-strategies-affect-mammary-gland-development-in-prepubertal-heifers
#12
R L Albino, A L Sguizzato, K M Daniels, M S Duarte, M M Lopes, S E F Guimarães, M M D C A Weller, M I Marcondes
In Brazil, the majority of dairy cattle are Holstein × Gyr (H×G). It is unknown whether excessive energy intake negatively affects their mammary development to the same extent as in purebred Holsteins. We hypothesized that mammary development of H×G heifers can be affected by dietary energy supply. We evaluated the effect of different average daily gains (ADG) achieved by feeding different amounts of a standard diet during the growing period on biometric measurements, development of mammary parenchyma (PAR) and mammary fat pad (MFP), and blood hormones...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822543/dairy-calf-management-a-comparison-of-practices-and-producer-attitudes-among-conventional-and-organic-herds
#13
J A Pempek, G M Schuenemann, E Holder, G G Habing
Dairy calves are at high risk for morbidity and mortality early in life. Understanding producer attitudes is important for implementation of best management practices to improve calf health. The objectives of this study were to evaluate usage frequency and producer attitudes on key calf management practices between conventional and organic dairy operations. A cross-sectional survey was mailed to conventional and organic dairy producers in Ohio and Michigan that included questions on cow-calf separation, colostrum management, and vaccination use...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822542/short-communication-a-study-of-lactobacillus-isolates-adherence-to-and-influence-on-membrane-integrity-of-human-caco-2-cells
#14
Neethu M Jose, Craig R Bunt, Arlene McDowell, Jasper Z S Chiu, Malik A Hussain
The selection criteria of ideal probiotic bacteria are complex and involve many factors. One key criterion is based on the ability of the probiotic bacteria to adhere to the epithelial lining of the gastrointestinal tract. The objective of this study was to evaluate and compare the adherence and influence on membrane integrity of 2 selected lactobacilli isolates-Lactobacillus rhamnosus MI13 (dairy food origin) and L. plantarum RC2 (bovine rumen origin)-to Caco-2 cells in the presence and absence of Escherichia coli...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28821160/leuconostoc-mesenteroides-derived-anticancer-pharmaceuticals-hinder-inflammation-and-cell-survival-in-colon-cancer-cells-by-modulating-nf-%C3%AE%C2%BAb-akt-pten-mapk-pathways
#15
Sepideh Zununi Vahed, Abolfazl Barzegari, Yalda Rahbar Saadat, Ali Goreyshi, Yadollah Omidi
Promising results from different studies on the effect of probiotics in cancer prevention and therapy have so far been reported. However, the molecular mechanism of the interaction of probiotics with cancer cells is yet to be fully understood. In the present study, Leuconostoc mesenteroides was isolated from traditional dairy products, and its probiotic characteristics were determined. HT-29 cells were treated with conditioned-medium of designated bacteria and the cell apoptosis was studied at cellular and molecular level using DAPI staining, flow cytometry, DNA ladder assays, and real-time quantitative-PCR (q-PCR)...
August 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28820455/beverage-intake-among-children-associations-with-parent-and-home-related-factors
#16
Arwa Zahid, Cynthia Davey, Marla Reicks
Beverage intake can influence child diet quality in a positive or negative manner depending on the beverage type and amounts consumed. Parenting practices such as role modeling and control of home beverage availability have been associated with child beverage intake, whereas examination of the influence of parental beverage nutrition knowledge has been more limited. The purpose of this study was to examine the relationships between sugar-sweetened and dairy beverage intake among children (9-12 years) and home and parental factors...
August 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28820445/choline-intake-and-its-food-sources-in-the-diet-of-romanian-kindergarten-children
#17
Cristian Reinhard Prelicz, Lucia Maria Lotrean
The objective of this study is to assess the usual intake and food sources of choline in a group of Romanian kindergarten children. A cross-sectional study was performed among 71 children aged 4-6 years from four kindergartens from Cluj-Napoca, Romania. Dietary intake data were collected by means of three-day food records. The mean (SD) daily intake of choline was 215 (32) mg/day, 22.5% of the participants fulfilling the adequate intake (AI) for children 4-6 years of age of 250 mg of choline per day. The main food sources were meat (mainly poultry), eggs, grains, cereals, and baked products (mainly bread), and dairy products (mainly milk)...
August 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28820080/diet-quality-and-its-implications-on-the-cardio-metabolic-physical-and-general-health-of-older-men-the-concord-health-and-ageing-in-men-project-champ
#18
Rosilene V Ribeiro, Vasant Hirani, Alistair M Senior, Alison K Gosby, Robert G Cumming, Fiona M Blyth, Vasi Naganathan, Louise M Waite, David J Handelsman, Hal Kendig, Markus J Seibel, Stephen J Simpson, Fiona Stanaway, Margaret Allman-Farinelli, David G Le Couteur
The revised Dietary Guideline Index (DGI-2013) scores individuals' diets according to their compliance with the Australian Dietary Guideline (ADG). This cross-sectional study assesses the diet quality of 794 community-dwelling men aged 74 years and older, living in Sydney, Australia participating in the Concord Health and Ageing in Men Project; it also examines sociodemographic and lifestyle factors associated with DGI-2013 scores; it studies associations between DGI-2103 scores and the following measures: homoeostasis model assessment - insulin resistance, LDL-cholesterol, HDL-cholesterol, TAG, blood pressure, waist:hip ratio, BMI, number of co-morbidities and medications and frailty status while also accounting for the effect of ethnicity in these relationships...
July 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28819569/a-study-on-il8rb-gene-polymorphism-as-a-potential-immuno-compromised-adherent-in-exaggeration-of-parenteral-and-mammo-crine-oxidative-stress-during-mastitis-in-buffalo
#19
S M El Nahas, A H El Kasas, A A Abou Mossallem, M I Abdelhamid, Mohamad Warda
The genetic markers in inflammatory responses during mastitis afford a reasonable way for improving milk production in the Egyptian buffalo breed. Among them is the interleukin 8 Receptor Gene (IL8RB) (CXCR2); a chemokine receptor gene augments the neutrophil migration during infection. To understand its role better during mastitis in Egyptian buffalos, twenty-five dairy animals representing the normal, sub-clinically, clinically and chronically affected buffalos were randomly selected from different districts...
November 2017: Journal of Advanced Research
https://www.readbyqxmd.com/read/28819221/functional-validation-of-gpihbp1-and-identification-of-a-functional-mutation-in-gpihbp1-for-milk-fat-traits-in-dairy-cattle
#20
Jie Yang, Xuan Liu, Dan Wang, Chao Ning, Haifei Wang, Qin Zhang, Li Jiang
In a previous genome-wide association study (GWAS) on milk production traits in a Chinese Holstein population, we revealed that GPIHBP1 is a novel promising candidate gene for milk fat content traits. In this study, we performed over-expression and RNAi experiments on GPIHBP1 in bovine primary mammary epithelial cells. The results showed that the expression of several important milk fat-related genes (LPL, CD36, VLDLR, ACACA and FASN) increased or decreased when the expression of GPIHBP1 was up- or down-regulated...
August 17, 2017: Scientific Reports
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