Showing papers by "Seongwon Seo published in 2010"
TL;DR: A number of studies showed contradictory results in microbial protein synthesis, nitrogen retention and animal production performance, suggesting there are additional challenges to nutrient synchrony that must be addressed.
Abstract: The objective of this paper was to review recent studies on nutrient synchrony and the effects of synchronization of energy and N supply in the rumen on nitrogen utilization and animal performance. Theoretically, synchronization of energy and N supply in the rumen should allow more efficient use of nutrients by rumen microbes, increase microbial protein and fermentation end products, and thus increase available nutrients in the small intestine. Efficient use of nutrients possibly improves animal performance and reduces nutrient excretion to the environment. However, a number of studies showed contradictory results in microbial protein synthesis, nitrogen retention and animal production performance. Since there are additional challenges to nutrient synchrony that must be addressed, further research is required to apply the nutrient synchrony concept directly to the field situation.
43 citations
TL;DR: It is concluded that a calf starter containing 8% PKM with 0.1% CTCZYME ⓡ is comparable with a conventional starter in feed intake and growth performance of calf, which is beneficial in terms of reduction in feed cost.
Abstract: The objective of this study was to evaluate effects of supplementation of β-mannanase (CTCZYME ⓡ , CTCBIO, Inc.) on feed intake, growth performance and fecal health of calves fed two levels (3% vs. 8%) of palm kernel meal (PKM). A total of nine Holstein calves were divided into three groups, and fed a conventional starter containing 3% PKM (CON), CON+ 0.1% CTCZYME ⓡ (TRT1), or a starter containing 8% PKM+ 0.1% CTCZYME ⓡ (TRT2). No clinical symptom of calves was observed through the trial. We did not find significant differences among the treatments on mean feed intake, growth performance, or fecal health during the four-week experimental period. Feed efficiency tended to be improved by adding CTCZYME ⓡ (0.46, 0.87 and 0.52 for CON, TRT1 and TRT2, respectively). Compared with CON (921 g/d and 786 g/d), TRT2 had lower feed intake (727 g/d) and average daily gain (ADG, 631 g/d) before weaning. However, feed intake (2300 g/d) and ADG (1012 g/d) were similar or even higher in TRT2 than CON (2269 g/d and 560 g/d) after weaning. This was probably due to the effect of a large amount of mannan-oligosaccharide released from PKM by β-mannanase. Salmonella was not detected any fecal samples. No significant difference was observed in the number of fecal E. coli or fecal properties including color, smell, and watery indexes among the treatments. We conclude that a calf starter containing 8% PKM with 0.1% CTCZYME ⓡ is comparable with a conventional starter in feed intake and growth performance of calf, which is beneficial in terms of reduction in feed cost.
3 citations
TL;DR: In this article, six SNP markers derived from Illumina 50K bovine SNP chip data were used for the discrimination between Korean cattle (Hanwoo) and imported beef from USA.
Abstract: Due to the large amount of beef imported from the USA to Korea, Korean consumers have become increasingly interested in the country of origin since it can affect market prices. Previously, Bos indicus and Bos taurus-specific markers were developed for the purpose of cattle breed identification, specifically discrimination of Australian beef. In this study, six SNP markers derived from Illumina 50K bovine SNP chip data were used for the discrimination between Korean cattle (Hanwoo) and imported beef from USA. PCR-RFLP genotyping methods were also developed, which indicates that these markers can be applied relatively easily compared to other markers. Taking into account a discrimination rate of 55% based on MC1R marker between Hanwoo and imported beef from USA, two additional markers, SNPs 23803 and 34776, were ideal and resulted in probability of identification of 0.942 and probability of misjudgment of 0.03. Therefore, the markers developed in this study can greatly contribute to the correct discrimination between beef from USA and Hanwoo beef.
3 citations
30 Sep 2010
TL;DR: The chicken PGDB is useful for studies on avian and chicken metabolism and provides a platform for comparative genomic and metabolic analysis of animal biology and biomedicine.
Abstract: Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, KoreaABSTRACT Chicken is an important livestock as a valuable biomedical model as well as food for human, and there is a strong rationale for improving our understanding on metabolism and physiology of this organism. The first draft of chicken genome assem-bly was released in 2004, which enables elaboration on the linkage between genetic and metabolic traits of chicken. The objectives of this study were thus to reconstruct metabolic pathway of the chicken genome and to construct a chicken specific pathway genome database (PGDB). We developed a comprehensive genome database for chicken by integrating all the known annotations for chicken genes and proteins using a pipeline written in Perl. Based on the comprehensive genome annotations, metabolic pathways of the chicken genome were reconstructed using the PathoLogic algorithm in Pathway Tools software. We identified a total of 212 me-tabolic pathways, 2,709 enzymes, 71 transporters, 1,698 enzymatic reactions, 8 transport reactions, and 1,360 compounds in the current chicken genome build, Gallus_gallus-2.1. Comparative metabolic analysis with the human, mouse and cattle genomes re-vealed that core metabolic pathways are highly conserved in the chicken genome. It was indicated the quality of assembly and anno-tations of the chicken genome need to be improved and more researches are required for improving our understanding on function of genes and metabolic pathways of avian species. We conclude that the chicken PGDB is useful for studies on avian and chicken metabolism and provides a platform for comparative genomic and metabolic analysis of animal biology and biomedicine.(Key words : metabolic reconstruction, chicken genome, pathway genome database, bioinformatics)To whom correspondence should be addressed : swseo@cnu.kr'(Gallus gallus)()*+,!-./012 345 6+78!- 9, :*)'(; ?34%@ABCDEFGHIJKL8M>NO+P%QRS=TUB, %B%d+Z[e% f, 0gHhf, ;ijkA#lm 6Q` a=nopqc%, BQ 34rst!-uF. B;ejv+BwxyzB{>|}~V{>KB}=TU%&=:ue 34, {}|+E+BUW, :>NO+{}|?\](genome-scale model)=TJ-uF(Schilling et al., 1999). {}|?\]J(.{}$B[: , >=epqc{}$B##J, UX=F. {}|?\]J=U;4 8u9 , +bc idp.¢%£e¤A¢%=zF¥%|B{}|;4[ r¦F(Seo and Lewin, 2009). §, Pathway Tools v¨©a8e}|;4[ ue«{¬u,¬®7e« , PathoLogic ¯¤d°=¬u±{}|BE²MetaCyc(Caspi et al., 2006)+zm;4P
1 citations