Czech Journal of Animal Science, 2018 (vol. 63), issue 6
Effects of meeting the requirements in energy and protein, and of systemic inflammation on the interval from parturition to conception in dairy cowsOriginal Paper
Elke Humer, Leonhard Gruber, Qendrim Zebeli
Czech J. Anim. Sci., 2018, 63(6):201-211 | DOI: 10.17221/13/2017-CJAS 
Main aim of this retrospective study was to determine the role of the level of meeting the requirements in net energy of lactation (NEL) and utilizable crude protein at the duodenum (uCP) in weeks 3-17 postpartum on the interval from parturition until conception (IUC) in dairy cows. We compared intakes and balances of NEL and uCP, body weight change, metabolic status, reticuloruminal pH, and serum amyloid A (SAA) as a systemic inflammation marker in 30 dairy cows differing in the IUC length (i.e., short (S; n = 8), medium (M; n = 11), and long (L; n = 11) IUC for cows confirmed pregnant...
Genetic evaluation of growth traits in Nellore cattle through multi-trait and random regression modelsOriginal Paper
Bruno Bastos Teixeira, Rodrigo Reis Mota, Raysildo Barbosa Lôbo, Luciano Pinheiro da Silva, Antônio Policarpo Souza Carneiro, Felipe Gomes da Silva, Giovani da Costa Caetano, Fabyano Fonseca e Silva
Czech J. Anim. Sci., 2018, 63(6):212-221 | DOI: 10.17221/21/2017-CJAS
We aimed to evaluate different orders of fixed and random effects in random regression models (RRM) based on Legendre orthogonal polynomials as well as to verify the feasibility of these models to describe growth curves in Nellore cattle. The proposed RRM were also compared to multi-trait models (MTM). Variance components and genetic parameters estimates were performed via REML for all models. Twelve RRM were compared through Akaike (AIC) and Bayesian (BIC) information criteria. The model of order three for the fixed curve and four for all random effects (direct genetic, maternal genetic, permanent environment, and maternal permanent environment) fits...
Effect of freeze-dried pasture herbage on ileal digestibility of amino acids and fatty acids in chickensOriginal Paper
Miloš Skřivan, Milan Marounek, Michaela Englmaierová, Eva Skřivanová, Kateřina Růnová
Czech J. Anim. Sci., 2018, 63(6):222-229 | DOI: 10.17221/114/2017-CJAS
The ileal digestibility of amino acids and fatty acids in young chickens fed control diet or experimental diets supplemented with freeze-dried pasture herbage at 20 or 40 g/kg was studied. Control diet contained wheat, maize, and soybean meal. Predominant species in the pasture herbage harvested in May were Lolium perenne, Festuca pratensis, and Trifolium pratense. Freeze-dried pasture herbage contained less protein (169 g/kg) and fat (24 g/kg) and more neutral detergent and acid detergent fibre (340 and 210 g/kg) and tannins (12.38 g/kg) than control diet. Concentrations of amino acids, except phenylalanine and threonine,...
Bayesian inference of genetic parameters for reproductive and performance traits in White Leghorn hensOriginal Paper
Jaqueline O. Rosa, Guilherme Costa Venturini, Tatiane Cristina Seleguim Chud, Bruno Carlos Pires, Marcos Eli Buzanskas, Nedenia Bonvino Stafuzza, Gabriel Rezende Furquim, Valdecy Aparecida Mônica Corrêa Ledur, Danísio Prado Munari
Czech J. Anim. Sci., 2018, 63(6):230-236 | DOI: 10.17221/116/2017-CJAS
This study estimated the genetic parameters for reproductive and performance traits and determined which ones can be used as selection criteria for egg production in laying hens using the Bayesian inference. The data of 1894 animals from three generations of White Leghorn laying hens were analyzed for fertility (FERT), hatchability (HATC), and birth rate measurements at 60 weeks of age (BIRTH), body weight at 16 and 60 weeks of age (BW16 and BW60), age at sexual maturity (ASM), egg height/width ratio, weight, and density at 28, 36, and 40 weeks of age (RHW28, RHW36, RHW40, WEGG28, WEGG36, WEGG40, DENS28, DENS36, and DENS40, respectively) traits. The...
Genetic analysis of the Hungarian population of endangered Hucul horsesOriginal Paper
Enikő Somogyvári, János Posta, Sándor Mihók
Czech J. Anim. Sci., 2018, 63(6):237-246 | DOI: 10.17221/54/2017-CJAS
The population genetic evaluation of the Hungarian Hucul horse population was performed based on pedigree records. Herd book data of registered Hucul horses available up to 2016 were analysed using ENDOG (Gutierrez and Goyache 2005) and POPREP (Groeneveld et al. 2009) on the whole population (WP) as well as on the reference stock (RS) (breeding stock registered in 2016). Inbreeding coefficients were 5.57% (WP) and 7.18% (RS). Average relatedness was 10.39% in WP and higher in RS (12.67%). Effective population size was 52.32. Generation interval was 13.01 years for WP and 10.99 years for RS. The values for equivalent complete generations were 6.07 and...