Czech Journal of Animal Science, 2022 (vol. 67), issue 5
Effect of genotype, lactation and climatic factors on fatty acid profile of bovine milkOriginal Paper
Isabel Cristina Acosta-Balcazar, Jorge Quiroz-Valiente, Lorenzo Granados-Zurita, Emilio Manuel Aranda-Ibáñez, Edith Hernández-Nataren, Joaquín Alberto Rincón-Ramírez, Lorenzo Danilo Granados-Rivera
Czech J. Anim. Sci., 2022, 67(5):167-175 | DOI: 10.17221/32/2022-CJAS 
Milk fat from bovine milk contains fatty acids that may have favourable properties for human health, for example, conjugated linoleic acid (CLA) has nutraceutical activity. This research aimed to know the effects of genotype, days of lactation and climatic factors on the fatty acids (FA) profile of milk and particularly the content of CLA in milk fat. Seventeen first-calving milking cows in early lactation were used for the assessment of milk; 12 were Gyr and five were F1 (Holstein/Gyr) crosses. Sampling was carried out every 15 days, from the beginning to the end of lactation (300 days). Fatty acids were analyzed employing gas chromatography. The...
Differences between chemical analysis and portable near-infrared reflectance spectrometry in maize hybridsOriginal Paper
Radko Loučka, Václav Jambor, Jan Nedělník, Jaroslav Lang, Petr Homolka, Filip Jančík, Veronika Koukolová, Petra Kubelková, Yvona Tyrolová, Alena Výborná
Czech J. Anim. Sci., 2022, 67(5):176-184 | DOI: 10.17221/23/2022-CJAS
The aim of this study is to compare the differences between four maize hybrids in terms of nutrient determination by portable near-infrared reflectance spectrometer (pNIRS) and chemical analysis; each of the hybrids was grown in the same locality from 2018 to 2020. The topic relates to the variability of the feed value of maize being an important feedstuff in livestock nutrition. The nutritional values determined by pNIRS in comparison with the chemical analysis were higher (P < 0.001) in starch and ash content but lower in dry matter, neutral detergent fibre and crude protein (CP) content. The digestibility levels of neutral detergent...
Effect of dietary Sophora alopecuroides supplementation on differential expression of intramuscular fat-related genes of Ningxia Tan sheep as determined by transcriptome sequencingOriginal Paper
Guosheng Xin, Ju Guo, Baojun Yu, Hao Li, Yaling Gu, Qiaoxian Gao, Juan Zhang
Czech J. Anim. Sci., 2022, 67(5):185-197 | DOI: 10.17221/127/2021-CJAS
The present study investigated the effect of different dietary levels (0%, 0.25%, 0.5%, 1%, 2%) of Sophora alopecuroides (S. alopecuroides) on intramuscular fat (IMF) content in Ningxia Tan sheep. Candidate genes affecting IMF deposition were screened by comparing the RNA-Seq profiles of test (2% S. alopecuroides) and control (no S. alopecuroides) groups. The results showed that the intramuscular fat content of the diet supplemented with S. alopecuroides was significantly lower than that of the control group, and the intramuscular fat content decreased significantly with the increase of the dietary content...
Effect of partial and complete substitution of lupin meal for soybean meal in diets on changes in fatty acid composition of muscle fat in broiler chickensOriginal Paper
Martin Kutlvašr, Eva Straková, Pavel Suchý, Lucie Všetičková
Czech J. Anim. Sci., 2022, 67(5):198-207 | DOI: 10.17221/56/2022-CJAS
The experiment aimed to determine the effect of 50% (LS50) or 100% (LS100) substitution of lupin protein (variety Zulika) for soybean protein in feed mixtures intended for the nutrition of broiler chickens, on muscular fat quality (composition of fatty acids). There were established three groups of chickens for fattening with 80 individuals each (control group C and experimental groups). After the 34-day fattening period chicken breast and thigh muscles were analysed to find out the fatty acid composition. Lupin protein-based diets had a positive effect on the muscle quality of fattened chickens due to changes in fatty acid composition,...