Czech Journal of Animal Science, 2022 (vol. 67), issue 8
Marine by-products and insects as a potential chitosan source for ruminant feed additivesReview
Ayu Septi Anggraeni, Anuraga Jayanegara, Erika Budiarti Laconi, Nur Rochmah Kumalasari, Ahmad Sofyan
Czech J. Anim. Sci., 2022, 67(8):295-317 | DOI: 10.17221/42/2022-CJAS 
Chitosan is a hydrophilic polysaccharide produced from chitin that has a wide range of applications. Chitosan has several functions as an anti-microbial, methane reducer, and protein protective agent. Based on this function chitosan has been explored for its potential as a feed additive. Moreover, source and extraction technique have potentially affected the yield and degree of deacetylation (DD) of chitosan products. The present review provides information on various chitosan isolation processes in marine by-products and insects and the result of their DD and yield. Chemical isolation processes are still popular in industries compared with biological...
Molecular characterization and A1/A2 genotyping of casein beta gene in zebu and crossbred cattle of BangladeshOriginal Paper
Mohammad Hasanuzzaman Pabitra, Tanvir Mohammad Maruf, Sabrina Islam Mony, Rashik Ebnat, Md. Rashedul Hoque, Mohammad Shamsul Alam Bhuiyan
Czech J. Anim. Sci., 2022, 67(8):318-326 | DOI: 10.17221/206/2021-CJAS
Casein beta (CSN2) is the most explored gene in cattle due to its potential impact on human health. Here, we investigated the entire coding sequence of CSN2 gene except the last two codons for detection of polymorphisms in different cattle populations of Bangladesh as well as genotyping of A1 and A2 allelic variants using a newly developed allele specific polymerase chain reaction (AS-PCR) based the genotyping protocol. Five primer pairs were used to amplify the coding sequences of CSN2 gene. This study included a total of 258 DNA samples from six Bangladeshi zebu populations and one Holstein Friesian (HF)...
Ovary transcriptome profiling in high- and low-yielding Chinese Chahua laying chickensOriginal Paper
Yanli Du, Linlin Liu, Yong Liu, Kun Wang, Hongmei Shi, Yang He, Yingxiang Long, Dawei Sun, Hao Wu, Xiannian Zi, Xuzheng Li, Wei Huang, Ru Zhang, Changrong Ge
Czech J. Anim. Sci., 2022, 67(8):327-338 | DOI: 10.17221/31/2022-CJAS
This study aimed to explore the underlying reasons for the differences in egg production in Chinese Chahua chickens. The Chahua chicken population was divided into two groups, namely a high-yielding group (H) and a low-yielding group (L). The egg-laying performance, ovarian morphology, histological characteristics, and serum hormone concentrations in the H and L groups were analysed. The results revealed that there were significant differences (P < 0.01) between the two groups for the age at the first egg and the number of eggs. The H group showed significantly more (P < 0.01) hierarchical follicles and small yellow follicles...
Effect of dietary supplementation with mulberry and moringa leaves on the chicken reproductive performanceOriginal Paper
Manman Shen, Tao Li, Jian Lu, Kehua Wang, Liang Qu, Qirui Hou, Weiguo Zhao, Ping Wu
Czech J. Anim. Sci., 2022, 67(8):339-347 | DOI: 10.17221/166/2021-CJAS
The effects of dietary supplementation with moringa (Moringa oleifera Lam.) and mulberry (Morus nigra L.) leaf powder on the clutch trait, reproductive organs, follicles, steroid hormones, and gene expressions of laying chickens were investigated during a 42-day experiment. Two hundred and ten Chinese local strain hens aged 37 weeks were randomly allocated to three groups, each group included five replicates, with 14 hens per replicate. The hens in the control group were fed with the basal diet, whereas those in the test groups were fed with a basal diet supplemented with 2.5% moringa leaf powder and 2.5% mulberry leaf powder (MOLP2.5+MLP2.5),...