A5066164227- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Agricultural and Food Production Studies
- Reproductive Physiology in Livestock
- Agriculture and Rural Development Research
- Animal Behavior and Welfare Studies
- Ruminant Nutrition and Digestive Physiology
- Meat and Animal Product Quality
- Veterinary Equine Medical Research
- Genetic Mapping and Diversity in Plants and Animals
- Animal Nutrition and Physiology
- Genetics and Plant Breeding
- Sports Performance and Training
- Milk Quality and Mastitis in Dairy Cows
- Animal Genetics and Reproduction
- Agriculture Sustainability and Environmental Impact
- Thermoregulation and physiological responses
- Pharmacological Effects and Assays
- Agroforestry and silvopastoral systems
- Sustainable Agricultural Systems Analysis
- Health, Education, and Physical Culture
- Silkworms and Sericulture Research
- Muscle metabolism and nutrition
- Livestock Management and Performance Improvement
- Livestock and Poultry Management
Universidad Independiente
2024
University of Córdoba
2014-2023
Universidad Laboral de Córdoba
2023
Universidade Federal de Rondônia
2020
Universidade Federal de Rondonópolis
2020
Agricultural University of Havana
2020
Cordoba University
2019
Universidad Complutense de Madrid
2007-2017
Ministerio de Salud Pública
2016
Universidad Politécnica de Madrid
2013
A total of 88,727 individual BW records Spanish Merino lambs, obtained from 30,214 animals between 2 and 92 d age, were analyzed using a random regression model (RRM). These progeny 546 rams 15,586 ewes raised in 30 flocks, 1992 2002, with 45,941 the pedigree. The contemporary groups (animals same flock, year, season, 452 levels), lambing number (11 combination sex lambs type litter (4 fixed coefficient age on included as effects. 7 RRM compared, best fit was for order 3 direct maternal...
Monthly test-day records of milk yield and composition in Murciano-Granadina (MG) Payoya (PYA) dairy goats were combined with weather data from meteorological stations, to analyse the effects heat stress on traits, measured an index temperature relative humidity (THI). A 'repeatability animal model' a 'reaction norm used estimate genetic (co)variance components. Estimates obtained both models very similar. The h(2) daily yields MG did not vary throughout THI scale, but pattern variation...
Summary The purpose of this study was to phenotypic plasticity ability for Show Jumping performance in horses according age differences. For study, 11 352 participations, belonging 1085 grouped by (4‐, 5‐ or 6‐year olds), were analysed. repeatability animal models ( RAM ) and multiple trait MTAM compared. assumed the same covariance components all groups, whereas considered results every at group as different (but correlated) traits. age, sex, starting order training level included fixed...
Summary To obtain a sport horse that excels in the highest levels of competition, breeders must take into account certain genetic and environmental factors could influence horse's performance, such as rider–horse interaction (RHI). The main aim this study was to describe model by modelling it relation age. A total 31,129 results from Spanish Sport Horses were used 1,101 animals evaluated, these grouped three age had been ridden 606 different riders. Only riders who more than one (and...
In this study, we analyzed the variation of reproductive efficiency, estimated as deviation between optimal and real parity number females at each stage cow's life, in 12,554 cows belonging to Retinta Spanish cattle breed, using classical repeatability random regression models. The results analyses model suggest that efficiency is not homogeneous throughout life. h2 estimate for was 0.30, while it increased across parities, from 0.24 first calving 0.51 9. Additionally, performed a...
There is substantial evidence showing that the polymorphism of goat α s1 -casein ( CSN1S1 ) gene has a major effect on milk protein, casein and fat content as well cheese yield. However, its influence synthesis rate been less studied, with measurements only available in French breeds. In this article, we have measured 89 Malagueña 138 Murciano-Granadina goats 305 460 phenotypic registers, respectively. breed, average values estimated for BB , BF EE FF genotypes were 6·94±0·38, 5·36±0·22,...
Summary A total of 71 522 records (from 3154 horses) with the times per kilometre (TPK), recorded in Spanish Trotter horses (individual races) from racing performances held 1991 to 2007, were available for this study. The TPK values different age groups (young and adult distances (1600–2700 m) considered as traits, a bi character random regression model (RRM) was applied estimate (co)variance components throughout trajectory distances. following effects fixed: combination hippodrome‐date...
The association of five candidate genes with sporting performance in young and adult Spanish Trotter horses (STHs) was performed according to a previous selection based on quantitative analysis the trait time per kilometre (TPK). A total 334 516 records TPK from 5958 STHs were used estimate estimated breeding values (EBVs) at different age groups (young adults horses) throughout range distances (1600-2700 m) using bicharacter random regression model. heritability by distance ranged 0.16...
A total of 1,031,143 records daily dairy control test Spanish Florida goats were used for this study. The database was edited, and only the first three lactations kept. final contained 340,654 daily-test somatic cell counts from 27,749 daughters 941 males 16,243 goats. evolution count in last 14 years analyzed following French American international associations’ criteria risk mastitis goats, confirmed slight increase SCS importance problem (50% tests show a suffering mastitis). For genetic...
Scores for four behavioural traits – aggressiveness, ferocity, face hiding and nobility recorded between 1984 2010 in Lidia bovine breed (the property of a single breeder Spain), were analysed using the multi-trait reaction norm models. The analysis results revealed heritability values 0.23 0.33 ferocity. Principal components genetic correlation matrix identified two factors that explained 91.6% total variance. Reaction across sexes time to be <|1|; this indicates existence an interaction...
Summary The direct and maternal genetic effects were estimated for the preweaning growth of Retinta calves with a multitrait model across parities, using longitudinal approach random regression models ( RRM ). 120 (P120) 180 days (P180) weights (5972 calves) considered as different traits in each calving. heritability effect parities was on average 0.37 P120 0.58 P180, slightly higher than estimates by univariate (0.30 0.56) bivariate 0.51, respectively). 0.16 0.26 P180 very similar uni‐...
Abstract The litter size (LS), or its equivalent the number of kids born in (NB), Creole goats Guadeloupe was studied by two procedures. first approach considered LS as a single trait and characteristic mother litter, an univariate animal model (UAM). second procedure treated NB, individual birth weight (BW) loss (LK) traits belonging to animals their dam, multitrait (MAM). heritability for genetic direct effect ( h 2 ) estimated UAM (0·14) 40% lower than corresponding value NB MAM. most...