A5006900224- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Ruminant Nutrition and Digestive Physiology
- Agriculture Sustainability and Environmental Impact
- Genetic Mapping and Diversity in Plants and Animals
- Animal Genetics and Reproduction
- Genetics and Plant Breeding
- Reproductive Physiology in Livestock
- Animal Nutrition and Physiology
- Sustainable Agricultural Systems Analysis
- Meat and Animal Product Quality
- Growth Hormone and Insulin-like Growth Factors
- Climate Change and Health Impacts
- Nutrition, Genetics, and Disease
- Horticultural and Viticultural Research
- Bioenergy crop production and management
- Genetic diversity and population structure
- Livestock and Poultry Management
- Agricultural and Food Production Studies
- Agricultural Economics and Policy
- Wheat and Barley Genetics and Pathology
- Heat Transfer Mechanisms
Instituto Nacional de Investigación Agropecuaria
2002-2023
National Institute of Health Dr. Ricardo Jorge
2020
University of Georgia
2000-2002
Abstract Model‐based accuracy, defined as the theoretical correlation between true and estimated breeding value, can be obtained for each individual a function of its prediction error variance (PEV) inbreeding coefficient F, in BLUP, GBLUP SSGBLUP genetic evaluations. However, computational convenience, is often ignored two places. First, computation reliability = 1‐PEV/(1 + F). Second, set‐up, using Henderson's rules, inverse pedigree‐based relationship matrix A . Both approximations have...
Growth curves are useful for describing the sigmoid shape of an animal's weight pattern over time. The purpose present study was to describe, first time, a complete growth curve pasture-fed Angus cows in Uruguay and analyze major fixed effects that affect estimation mature cow (CW). A total 22,743 records from 5,284 belonging 73 herds were used statistical analysis. Five nonlinear models (Brody, Gompertz, Von Bertalanffy, logistic, Richards) 3-knot cubic spline function fitted model change...
Abstract The seasonal effects of heat load and photoperiod on yield composition milk from primiparous cows in the course lactation were studied using test day records 8968 76 farms Georgia, collected 1990 through 1997. effect prepartum production subsequent these was also evaluated. These estimated compared with those for 4728 13 farms, 1538 multiparous three during consecutive lactations Israel 1994 1996. During lactation, length had a positive negative fat protein concentrations milk, but...
Selection for feed efficiency is the goal many genetic breeding programs in beef cattle. Residual intake has been included evaluations to reduce without compromising performance traits as liveweight, body gain or carcass traits. However, measuring expensive, and only a small percentage of selection candidates are phenotyped. Genomic become very important tool achieve effective progress these Another strategy implementation multi-trait prediction using easily recordable predictor on both...
Context Residual feed intake is a relevant trait for beef cattle, given the positive impact on reducing feeding costs and greenhouse gas emissions. The lack of large databases restriction when estimating accurate genetic parameters dry matter (DMI) residual (RFI), combining different data sets could be an alternative to increase amount achieve better estimations. Aim main objective was compare Uruguayan (URY; 780 bulls) Canadian (CAN; 1597 bulls), assess adequacy pooling both (ALL)...
El objetivo del Proyecto de Investigacion y Desarrollo Merino Fino para Uruguay (INIA, SUL, SCHU) es desarrollar una alternativa produccion ovina que por medio su difusion posterior adopcion, permita mejorar la sustentabilidad socioeconomica los productores lana las regiones Basalto Cristalino, considerando demandas actuales futuras Cadena Agroindustrial Pais mercados consumidores. Es asi se ha establecido un Nucleo Seleccion (a partir hembras nacionales importacion animales exterior), el...
Context Uninterrupted nutrient uptake and the use of bulls with high genetic merit for carcass traits may increase likelihood producing high-quality retail cuts different markets. Aim The objective this experiment was to evaluate combined effects level nutrition during 104-day post-weaning winter period (WADG; low-L: 0.2 vs high-H: 0.6 kg/calf per day) expected progeny differences (EPD) ribeye area (REA; high-H or average-Av) on Hereford steers. Methods Three crops calves (n = 317) were...
The phenotype-genotype associations of a panel SNP markers selected from candidate genes related to the growth hormone GH/IGF1endocrine axis and fatty acid synthesis desaturation SCD/SREBP1 pathways, were examined. Phenotypes interest carcass composition, meat quality profiles intramuscular fat in Hereford steers under different feeding treatments during finishing stages. Variables adjusted for effect eight nutritional residual values used association analysis with markers. A total 11 696...
En el Uruguay la raza Corriedale representa 70% del stock ovino, por lo cual es importante garantizar exactitud al realizar un diagnostico de paternidades mediante tipificacion ADN, con fin asistir a los registros genealogicos y programas seleccion para las caracteristicas importancia economica realizados en dicha raza. presente trabajo se desarrollo multiplex 10 microsatelites (Short Tandem Repeats, STR) recomendados panel ISAG (International Society of Animal Genetics). Con este analizo...
Abstract Reproductive traits in breeding herds can be improved through crossbreeding, which results breed differences, heterosis and complementarity. The aim of this study was to estimate group additive genetic dominance effects for three reproductive traits; probability artificial insemination (AIP); calving success (CS); days (DC) Hereford (H), Angus (A), Nellore (N) Salers (S) breeds under grazing conditions. Data were obtained from an experiment carried out during 1992–2002 by the...
Residual feed intake (RFI) is a relevant trait, but expensive to measure so few candidates are phenotyped and have accurate GEBVs. Genetic evaluation corresponds single trait evaluation, where RFI the residual from lineal regression on performance traits during feed-test. This study evaluates two approaches predict GEBV for RFI. First combing in multitrait model calculate of using selection index, 2nd inclusion weaning weight (WW) as an indicator combined with previous model. The GEBVs...
Residual feed intake (RFI) and methane (CH4) emissions are potential new selection objectives in beef sheep breeding programmes to assist reaching greenhouse gas mitigation targets support economic, social, environmental sustainability. Phenotyping platforms both species place Uruguay, linked with the genetically evaluated populations of main breeds (Hereford, Merino, Corriedale, Dohne Texel), being basis reference for genomic selection. Current progress findings described here. New indexes...