Czech Journal of Animal Science, 2018 (vol. 63), issue 12

Chinese yellow cattle PPARA gene: Analyses of expression, polymorphism and trait associationOriginal Paper

Ningbo Chen, Qiongqiong Zhang, Jingjing Zhi, Huayan Guo, Huihui Gao, Fen Li, Jieping Huang, Chuzhao Lei, Hong Chen, Yun Ma

Czech J. Anim. Sci., 2018, 63(12):473-482 | DOI: 10.17221/99/2017-CJAS  

Peroxisome proliferator-activated receptor alpha (PPARA) is a member of the nuclear receptor superfamily that regulates key proteins involved in fatty acid oxidation and extracellular lipid metabolism. Given the importance of PPARA in modulating energy metabolism, PPARA may be a suitable candidate gene for assessing economic traits in cattle. In the present study, the genetic diversity of the PPARA gene in Chinese cattle breeds and its effects on growth traits in the Nanyang and Jiaxian breeds were investigated. First, the transcript profiles for PPARA were determined in eight adult cattle tissue types. Next, polymorphisms...

Growth performance, carcass traits, blood parameters, rumen enzymes, and fattening earnings of cattle fed corn silage/corn stalk silage based finishing dietsOriginal Paper

Liwen He, Hao Wu, Qingxiang Meng, Zhenming Zhou

Czech J. Anim. Sci., 2018, 63(12):483-491 | DOI: 10.17221/108/2018-CJAS  

This study was conducted to investigate the growth performance, carcass traits, blood parameters, rumen enzymes, and fattening earnings of beef cattle when substituting corn stalk silage with corn silage or corn grain in finishing rations. Forty-five Bohai Black steers were selected and fattened in a three-phase (4 weeks-4 weeks-16 weeks) way with one of three diets based on corn silage (CS), corn stalk silage (SS) without/with equivalent corn grain supplement (SSC), respectively. During the 24-week trial, individual feed intake and body weight were recorded every four weeks. By the end, blood and rumen fluid were sampled, and all the cattle were slaughtered...

Genomic evaluation and variance component estimation of additive and dominance effects using single nucleotide polymorphism markers in heterogeneous stock miceOriginal Paper

Morteza Mahdavi, Gholam Reza Dashab, Mehdi Vafaye Valleh, Mohammad Rokouei, Mehdi Sargolzaei

Czech J. Anim. Sci., 2018, 63(12):492-506 | DOI: 10.17221/83/2017-CJAS  

Exploration of genetic variance has mostly been limited to additive effects estimated using pedigree data and non-additive effects have been ignored. This study aimed to evaluate the performance of single nucleotide polymorphisms (SNPs) marker models in the mixed and orthogonal framework including both additive and non-additive effects for estimating variances and genomic prediction in four diabetes-related traits in heterogeneous stock mice. Models have performed differently in detecting SNPs affecting traits. Dominance variances explained over 14.7 and 3.8% of genetic and phenotype variance in a Genomic...

Pedigree structure of American bison (Bison bison) populationOriginal Paper

Ewa Skotarczak, Piotr Ćwiertnia, Tomasz Szwaczkowski

Czech J. Anim. Sci., 2018, 63(12):507-517 | DOI: 10.17221/120/2017-CJAS  

An effective realization of breeding programs in zoos is strongly determined by completeness of animal pedigree information. The knowledge of pedigree structure allows to maintain optimal genetic variability of a given population. The aim of this study was to estimate the parameters describing the pedigree structure of American bison housed in zoos in the context of further management of the population. Finally, 4269 American bison were analysed (1883 males, 2217 females, and 169 with unknown sex). The registered animals were born between years 1874 and 2013. The following pedigree parameters were estimated: number of fully traced...

Performance and changes in body composition of broiler chickens depending on feeding regime and sexOriginal Paper

Eva Tůmová, Darina Chodová

Czech J. Anim. Sci., 2018, 63(12):518-525 | DOI: 10.17221/125/2018-CJAS  

The differences in the performance, carcass parts, and internal organs of broiler chicken females and males fed ad libitum or restricted by 80 and 65% ad libitum were evaluated. Ross 308 males and females (2430 chickens) were fed ad libitum (ADL) or were restricted in days 8-14 of age by 80% ADL (R1) and 65% ADL (R2), respectively. Feed restriction depressed the live weight (P ≤ 0.001) in both sexes. Both sexes compensated for growth, and at the end of the fattening at 35 days, the restricted males (-3% R1 and -6% R2) and females (-3% R1 and -4% R2) were not significantly lighter than the ADL chickens. Feed intake...