A5048767236- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Genetics and Plant Breeding
- Reproductive Physiology in Livestock
- Animal Nutrition and Physiology
- Ruminant Nutrition and Digestive Physiology
- Agricultural Economics and Policy
- Veterinary Equine Medical Research
- Effects of Environmental Stressors on Livestock
- Genetic diversity and population structure
- Cancer-related molecular mechanisms research
- Agriculture and Biological Studies
- Aquaculture Nutrition and Growth
- Wheat and Barley Genetics and Pathology
- Insect-Plant Interactions and Control
- Turfgrass Adaptation and Management
- BRCA gene mutations in cancer
- Statistical Methods and Inference
- Data Mining Algorithms and Applications
- Genetically Modified Organisms Research
- Bayesian Methods and Mixture Models
- Silkworms and Sericulture Research
- Genetics, Aging, and Longevity in Model Organisms
- Protein Hydrolysis and Bioactive Peptides
- Environmental Toxicology and Ecotoxicology
Swedish University of Agricultural Sciences
2007-2021
Islamic Azad University, Azadshahr Branch
2015
Swedish Species Information Centre
2010
Genotype by environment interaction for production and fertility was studied use of a reaction norm model. Milk recording data, comprising 927 929 records, were analysed to predict norms young bulls the Nordic Red dairy breeds. Random regressions estimated each bull, regressing phenotypic values daughters on herd environment. The measures 305 days kg protein open in first lactation. defined as herd-year average open, respectively. Heritability genetic correlation between two traits functions...
In recent years, the use of genomic information in livestock species for genetic improvement, association studies and many other fields has become routine. order to accommodate different market requirements terms genotyping cost, manufacturers single nucleotide polymorphism (SNP) arrays, private companies international consortia have developed a large number arrays with content SNP density. The currently available differs among species: ranging from one goats more than ten cattle, is...
Abstract The Baluchi breed is the most common native of Iran adapted to harsh environments in eastern parts country. data used present study, collected from two research flocks at Abbasabad sheep breeding station north-east Iran, included 20 534 animals descended 363 sires, 5992 dams, 282 maternal grandsires, and 2865 granddams during period 1966 1989. traits recorded were: birth weight (BW), weaning (WW), 6 months (W6), 12 (YW), pre-weaning gain (WG), post-weaning (PWG), lamb fleece (LFW),...
Abstract Background The genome-wide association study (GWAS) is a useful approach to identify genes affecting economically important traits in dairy cattle. Here, we report the results from GWAS based on high-density SNP genotype data and estimated breeding values for nine production, fertility, body conformation, udder health workability Brown Swiss cattle population that part of international genomic evaluation program. Result GWASs were performed using 50 k chip deregressed (DEBVs)...
Abstract The effect of selection for high phenotypic value in the presence a genotype by environment interaction (G ✕ E, i.e. genetic variation environmental sensitivity) and an improving was studied simulation. Environmental sensitivity evaluated using reaction norms, which describe phenotype expressed as function environment. Three types norms (linear, quadratic sigmoid), two schemes (mass progeny test selection) were studied. measured weighted average absolute first derivative norm...
Genomic preselection of young bulls is now widely implemented in dairy breeding schemes, especially the Holstein breed. However, if this step not accounted for genetic evaluation models, national values retained by a genomic and their progeny are estimated with bias. It follows that countries participating international evaluations will provide selected possibly biased set data to Interbull Centre (Swedish University Agricultural Sciences, Uppsala, Sweden). The objective study was show...
Various environmental variables were used in analysis of genotype by environment interaction (GxE) for first lactation protein yield and days open Swedish Red White dairy cattle. The described the herd level production fertility, size, geographic position, weather conditions herds. Fixed effects analysed using a fixed regression sire model. All studied variables, except average rainfall during summer, had significant effect on both open. Possible GxE evaluated random variables. was indicated...
The amount of variance captured in genetic estimations may depend on whether a pedigree-based or genomic relationship matrix is used. purpose this study was to investigate the as well predicted merits (PGM) using matrices Brown Swiss cattle. We examined range traits six populations amounting 173 population-trait combinations. A main aim determine how different affect estimation. calculated ratios between types estimates and analysed impact trait heritability population size. variances...
Variance and covariance components for birth weight (BWT), as a lamb trait, litter size measured on ewes in the first, second, third parities (LS1 through LS3) were estimated using Bayesian application of Gibbs sampler. Data came from Baluchi sheep born between 1966 1989 at Abbasabad breeding station, located northeast Mashhad, Iran. There 10,406 records BWT recorded all ewe lambs ram that later became sires or maternal grandsires. All dams had LS1 LS3. Separate bivariate analyses done each...
The international Brown Swiss cattle population pedigree was studied to measure genetic variations and identify the most influential animals. Twenty-two countries provided information on 71 497 bulls used for artificial insemination (AI). total number of animals with is 181 094. mean inbreeding coefficient 0.77%. There was, in cases, an increase coefficient, highest value at 2.89% during last 5-year period (2000 2004). average relatedness 1.1%. effective size 2004 204. notable variation...