A5011122937- Effects of Environmental Stressors on Livestock
- Genetic and phenotypic traits in livestock
- Reproductive Physiology in Livestock
- Animal Behavior and Welfare Studies
- Animal Nutrition and Physiology
- Thermoregulation and physiological responses
- Meat and Animal Product Quality
- Livestock and Poultry Management
- Climate Change and Health Impacts
- Ruminant Nutrition and Digestive Physiology
- Agricultural and Rural Development Research
- Heat Transfer Mechanisms
- Reproductive Biology and Fertility
- Muscle Physiology and Disorders
- Genetic Mapping and Diversity in Plants and Animals
- Aquaculture Nutrition and Growth
- Animal Diversity and Health Studies
- Postharvest Quality and Shelf Life Management
- Animal Disease Management and Epidemiology
- Phytase and its Applications
- T-cell and Retrovirus Studies
- Dermatoglyphics and Human Traits
- Bone and Dental Protein Studies
- Bat Biology and Ecology Studies
- Turtle Biology and Conservation
Yeditepe University
2025
Khazar University
2025
Bursa Uludağ Üni̇versi̇tesi̇
2015-2024
University of Florida
2017-2024
Creative Commons
2012
The SLICK haplotype (http://omia.angis.org.au/OMIA001372/9913/) in cattle confers animals with a short and sleek hair coat. Originally identified Senepol cattle, the gene has been introduced into Holsteins. objectives of current study were to determine (1) whether lactating Holsteins slick phenotype have superior ability for thermoregulation compared wild-type cows or relatives not inheriting haplotype, (2) seasonal depression milk yield would be reduced cows. In experiment 1, diurnal...
Heat stress compromises production, fertility, and health of dairy cattle. One mitigation strategy is to select individuals that are genetically resistant heat stress. Most the negative effects on animal performance a consequence either physiological adaptations regulate body temperature or adverse consequences failure temperature. Thus, selection for regulation during could increase thermotolerance. The objective was perform genome-wide association study (GWAS) rectal (RT) in lactating...
Genetic selection for body temperature during heat stress might be a useful approach to reduce the magnitude of effects on production and reproduction. Objectives study were estimate genetic parameters rectal (RT) in dairy cows freestall barns under conditions determine phenotypic correlations with other traits. Afternoon RT measured total 1,695 lactating Holstein sired by 509 bulls summer North Florida. estimated Gibbs sampling, best linear unbiased predictions breeding values predicted...
Evolutionary adaptations are occasionally convergent solutions to the same problem. A mutation contributing a heat tolerance adaptation in Senepol cattle, New World breed of mostly European descent, results distinct phenotype known as slick, where an animal has shorter hair and lower follicle density across its coat than wild-type animals. The causal variant, located 11th exon prolactin receptor, produces frameshift that truncated protein. However, this does not explain all cases slick coats...
Abstract Global warming is a major challenge to the sustainable and humane production of food because increased risk livestock heat stress. Here, example prolactin receptor ( PRLR ) gene used demonstrate how editing can increase resistance cattle stress by introduction mutations conferring thermotolerance. Several populations in South Central America possess natural that result affected animals having short hair being thermotolerant. CRISPR/Cas9 technology was introduce variants two...
Summary Dairy cows with increased rectal temperature experience lower milk yield and fertility. Rectal during heat stress is heritable, so genetic selection for body regulation could reduce effects of on production. One aim the study was to validate relationship between genotype tolerance single nucleotide polymorphisms ( SNP s) previously associated resistance stress. A second identify new s resistance. Thermotolerance assessed in lactating Holsteins summer by measuring (a direct...
Thermal stress in hot humid conditions limits cattle production. The objectives for this study were to estimate genetic parameters hair characteristics and core body temperature under low high humidity index (THI) conditions. Hair samples collected measured length diameter. Core was as vaginal every 15 min over a 5-d period using an iButton measuring device implanted blank CIDR 336 heifers from the University of Florida multibreed herd (ranging 100% Angus Brahman). Restricted maximum...
A total of 1 200 broiler breeder eggs were collected from a commercial flock at the hen age 37 weeks and divided into storage treatments 5 15 days. Prior to storage, further pre-storage incubation (PRESI) 0 (control), 4 8 h treatments. Eggs in PRESI treatment incubated standard dry-bulb temperature 38.0°C. All weighed prior after then setter hatcher for 21 After incubation, all unhatched opened determine fertility, hatchability embryonic death. The significantly decreased results long-term...
The objective was to evaluate the influence of varying amounts Brahman genetics on body temperature under pasture conditions during hot weather. Vaginal temperatures were measured at 5-min intervals for 3 5 d four occasions August and September from a total 190 pregnant cows that either Angus, 2/8 (remainder Angus), Brangus (3/8 Brahman), 4/8 Brahman, 6/8 or Brahman. higher first two replicates than second replicates. In replicates, average vaginal did not differ between genetic groups, but...
Maternal heat stress during late gestation affects calf function postnatal life. The objective of the present study was to evaluate whether calves that experience in utero have altered thermoregulatory responses acute later Specifically, hypothesis would improve response at maturity. Females were born dams exposed or cooled preceding their birth. All animals raised postnatally under identical management. Twelve lactating Holstein cows (HT) and 12 control (CON) used. A challenge conducted 3...
This study evaluated the effectiveness of genetic introgression SLICK1 allele derived from Senepol cattle into Holstein breed to enhance thermotolerance. The allele, located in PRLR gene, confers a short and sleek coat that is inherited as simple dominant phenotype. Approximately 40 years ago, University Florida initiated efforts introgress this population. Here we tracked using medium-density genotyping array reference population both breeds (50 Holstein, 46 Senepol). Among 31 SLICK1+...
The present study was carried out to determine the sex of fertilized white layer eggs with using morphological measurements. A total 300 Super Nick White Layer (54 wks age) were incubated and sexed in end incubation period. Before egg length, width weight measured. volume shape index estimated these measurements for each egg. effect replicate number not significant on hatching chick (p > 0.05). effects = 0.001), length 0.0018), < 0.01) 0.004) had chick. According results current study,...
The objectives of this experiment were to evaluate the accuracy ultrasonography measure subcutaneous fat thickness (SFT) and LM traits (area, depth, width) in live Awassi lambs different sexes, predict actual SFT without damage carcass, improve carcass classification. Data obtained from ultrasound scans 20 female 10 male lambs. Female randomly divided into light (FL; n = 10) heavy (FH; finishing groups. Slaughter weights FL 30 kg for FH groups 40 kg. Subcutaneous traits, cross-sectional area...
The objective of this study was to investigate the effects increasing doses carvacrol (C) and/or thymol (T) on performance, rumen fermentation, and blood carcass parameters Merino sheep. Eighty-four 12-week-old male lambs were randomly assigned 7 treatment groups. sheep fed with same concentrate mixtures including a control diet, 100 mg/kg (C100), 300 (C300), (T100), (T300), carvacrol+thymol (C50+T50), (C150+T150). C T supplementation did not affect feed conversion. diets had higher pH,...
Abstract Bos taurus indicus cattle have the superior ability for regulation of body temperature during heat stress due to a number physiological and cellular level adaptive traits. The objectives this study were quantify change in heifers with various proportions Brahman genes per unit increase as measured by temperature–humidity index (THI) assess how different breed groups responded varying intensity duration stress. A total 299 two-yr-old from six ranging 100% Angus evaluated under hot...
The slick-hair phenotype in cattle is due to one of a series mutations the prolactin receptor (PRLR) that cause truncation C-terminal region protein involved JAK2/STAT5 activation during signaling. Here we evaluated whether inheritance SLICK1 allele, first slick mutation discovered, inherited fashion consistent with Hardy-Weinberg equilibrium. It was hypothesized any deleterious effect inheriting allele on embryonic or fetal function would result reduced frequency offspring. A total 525...