Zobrazeno 1 - 9
of 9
pro vyhledávání: '"S E, Speidel"'
Autor:
Hernandez Cordero, M A Sanchez Castro, Zamorano Algandar, Luna Nevarez, G Rincon, J F Medrano, S E Speidel, R M Enns, M G Thomas
Publikováno v:
Genetics and Molecular Research. 16
The association of single nucleotide polymorphisms (SNPs) within genes of the prolactin (PRL), growth hormone (GH) and insulin-like growth factor-I (IGF1) pathways with 305-day milk yield (MY305) were evaluated in heat-stressed Holstein cows. Ambient
Publikováno v:
Journal of animal science. 94(11)
Pulmonary arterial pressure (PAP) is an indicator trait for pulmonary hypertension and for the risk of developing high-altitude disease (HAD) in cattle. Pulmonary arterial pressures provide a tool for selection of breeding cattle for tolerance to hig
Publikováno v:
Journal of animal science. 93(5)
The Beef Improvement Federation recommends residual feed intake (RFI) be calculated from 70-d tests preceded by a 21-d adjustment period. Individual animal feed intake and gain measurements are expensive and time consuming, which limits the number of
Publikováno v:
Journal of animal science. 89(7)
Selection criteria for yearling bulls commonly include indicators of fertility and carcass merit, such as scrotal circumference (SC) and intramuscular fat percentage (IMF). Genetic correlation estimates between ultrasound traits such as IMF and carca
Publikováno v:
Genetics and molecular research : GMR. 9(1)
Currently, many different data types are collected by beef cattle breed associations for the purpose of genetic evaluation. These data points are all biological characteristics of individual animals that can be measured multiple times over an animal'
Publikováno v:
Journal of animal science. 88(1)
The objective of this study was to characterize the population structure and genetic diversity of registered American Red Angus cattle. Inbreeding and average relationship coefficients, effective population size, effective number of founders, and eff
Publikováno v:
Journal of animal science. 87(5)
Maintenance energy requirements of cattle can be predicted from published equations utilizing metabolic BW and milk production potential. Metabolic BW is a function of BW at a constant fat percentage or BCS. Pedigree and performance records can be us
Publikováno v:
Journal of animal science. 85(3)
In good environments, cow intake is sufficient for their own growth and for milk production to support their calf. In poor environments, cows lose BW or may reduce milk supply to maintain themselves. Heritability for direct genetic and maternal compo
Publikováno v:
Journal of animal science. 85(3)
The objective of this study was to quantify the role of maternal effects on docility in Limousin cattle. Docility scores were obtained at weaning while animals were restrained in a squeeze chute. Scores 1 through 6 represented a docile to aggressive