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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Poultry Science
Journal Basic Information
Journal DOI :
The Korean Society of Poultry Science
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Volume & Issues
Volume 36, Issue 4 - Dec 2009
Volume 36, Issue 3 - Sep 2009
Volume 36, Issue 2 - Jun 2009
Volume 36, Issue 1 - Mar 2009
Volume 35, Issue 4 - Jan 2009
Selecting the target year
Effect of Dietary Organic or Inorganic Minerals (Selenium and Copper) on Layer`s Production and Their Transfer into the Egg
Park, T.S. ; Kim, J.Y. ; You, S.J. ; Lee, B.K. ; Kim, J.M. ; Kim, E.J. ; Ahn, B.K. ; Kang, C.W. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 103~110
DOI : 10.5536/KJPS.2009.36.2.103
This experiment was conducted using 350 Lohmann Brown layers (67 weeks of age) to evaluate the dietary effect of organic or inorganic Se and Cu on their contents in chicken eggs. The layers were divided into seven groups and fed a commercial diet or one of the six experimental diets containing different levels of Se and Cu (T1, 0.3ppm organic Se; T2, 1.0ppm organic Se; T3, 1.0ppm inorganic Se; T4, 125ppm organic Cu; T5, 250ppm organic Cu; and T6, 250ppm inorganic Cu) for 5 weeks. No significant differences were observed in egg production and its qualities among groups. The contents of blood cholesterol in the birds fed various levels of Se and Cu were not significantly different as compared to control. Se contents in eggs were linearly increased as dietary Se levels increased for both sources, but Se contents from the groups fed organic Se were slightly higher than those fed inorganic Se. Sensory characteristics of eggs were not influenced by dietary treatments. In conclusion, Se contents in eggs were linearly increased as dietary levels of organic or inorganic Se increased, but eggs in layers fed the diet containing organic Se did not show higher Se contents than those in birds fed dietary inorganic Se.
Recent Status of Chicken Genome Researches
Seo, S.W. ; Paek, W.K. ; Lee, J.H. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 111~115
DOI : 10.5536/KJPS.2009.36.2.111
Chicken has been being used as the protein sources for humans for long times. Since the release of chicken genome sequencing, large efforts have been carried out for identifying valuable genomic information in chicken including the genes affecting quantitative traits, development and immune responses. In this review, the recent progress of genomic researches has been discussed including the available world wide genetic materials in chicken.
Effect of Induced Molting on Changes of Visceral Organs and Blood Stress Indicators in Laying Hens
Hong, E.C. ; Park, H.D. ; Kang, G.H. ; Na, J.C. ; You, D.C. ; Kim, H.K. ; Choi, Y.H. ; Bae, H.D. ; HwangBo, J. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 117~123
DOI : 10.5536/KJPS.2009.36.2.117
This work was conducted to evaluate the effects of induced-molting methods on visceral organs and blood stress indicators in laying hens. One hundred fifty of 63-wk-old White Leghorn hens, with over 85% of egg production and
of average weight, were used in this study. Treatments were control (non-molt treatment), feeding molt treatment (FM), and starving molt treatment (SM). There were 5 replicates of 10 hens for each treatment. All treatment groups were fed basal diet (15% CP and 2,700 kal/kg of ME) for two weeks as adaptation period. Heart weights were 8.2, 7.9 and 7.5 g in control, FM and SM, respectively. Liver and oviduct weights were decreased in both molting treatments compared with control (P<0.05). Corticosterone (CS) concentrations were 4.48, 4.47 and
in control, FM and SM at 61 weeks, respectively, but increased to 7.32, 7.11 and
at 62 weeks, respectively (P<0.05). Heterophil to lymphocyte ratios were 0.27~0.29 in all groups at 61 weeks, but increased to 0.97~1.03 in SM at 62 weeks. Both CS concentrations and H:L ratios in SM were greater compared with those for the other groups. These results suggest that hens in feeding molting program in hens are less stressed than those in starving molting one.
Effect of Dietary Oligosaccharides on the Performance, Intestinal Microflora and Serum Immunoglobulin Contents in Laying Hens
Kim, C.H. ; Shin, K.S. ; Woo, K.C. ; Paik, I.K. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 125~131
DOI : 10.5536/KJPS.2009.36.2.125
This study was conducted to investigate the effects of dietary supplementation of mannan-oligosaccharides (MOS) and fructo-oligosaccharides (FOS) on the performance, immune response and small intestinal microflora in laying hens. A total of 960 Hy-Line
laying hens of 27 wks old, housed in 2 bird cages, were assigned in a completely randomized block design into one of the following 6 dietary treatments: control, antibiotic (6 ppm avilamycine), 0.025% MOS, 0.05% MOS, 0.25% FOS, and 0.5% FOS. Each treatment had 4 replicates of 40 birds and was fed ad libitum for 6 wks under 16 h lighting regimen. There were significant differences among treatments in hen-day and hen-housed egg production. Hen-day egg production in 0.025% MOS was significantly higher than that of control. Hen-housed egg production in antibiotic-treated group was significantly higher compared with control. Egg weight, feed intake and feed conversion were not significantly different among treatments. Egg shell thickness was highest in 0.25% FOS, but was not significantly different among the rest of treatments. There were no significant differences among treatments in egg shell strength, egg shell color, egg yolk color and Haugh unit. IgG concentrations in serum were not significantly different among treatments. On the other hand, IgA concentrations of the treated birds tended to be increased compared with control. Dietary treatments tended to decrease Cl. perfringens and E. coli, and to increase Lactobacillus spp. The result of this experiment showed that dietary supplementation of MOS and FOS in laying hens tended to improve egg production comparable to the supplementation of antibiotics. The level of serum IgA and small intestinal microflora were also significantly affected by the treatments.
A Comparison of Performances for Growing Periods of Duck Breeders
Na, J.C. ; Bang, H.T. ; Park, S.B. ; Yu, D.J. ; Kim, H.G. ; Kang, G.H. ; Park, M.N. ; Choi, H.C. ; Suh, O.S. ; Kang, H.K. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 133~137
DOI : 10.5536/KJPS.2009.36.2.133
This study was conducted to evaluate the performance of Cherry Valley and Grimaud strain. A total of two hundred eighty eight, one day old duck breeders (Cherry Valley and Grimaud strain) were randomly divided into two groups with 4 replicates of 36 birds each and fed a commercially available diet for 24 weeks. Overall body weight gain was significantly higher in Cherry Valley (3,064 g) than in Grimaud strain (2,851 g). Feed intake was significantly increased in Grimaud strain compared with Cherry Valley strain (p<0.05). Viability of Grimaud strain showed 100.0% and was higher than that of Cherry Valley strain. Uniformity was not statistically different between Cherry Valley and Grimaud strains.
Effect of Various Organic Dietary ME and CP on Performance, Blood Composition and Meat Quality in Meat Type Cross-Bred Chicks
Jeong, Y.D. ; Jeon, B.S. ; Ryu, K.S. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 139~147
DOI : 10.5536/KJPS.2009.36.2.139
This experiment was conducted to investigate the effect of organic dietary ME and CP on performance, blood composition and meat quality of cross-bred chicks for 15 weeks. Experiments were factorially designed with 3,000, 3,050, and 3,100 kcal of ME/kg, and 21 and 22% CP for the first five weeks; 3,050, 3,100, and 3,150 kcal of ME/kg, and 19 and 20% CP for the second five weeks; and 3,100 and 3,150 kcal of ME/kg, and 17 and 18% CP for the rest of weeks. Each treatment consisted of four replicates. Weight gain increased in treatments with higher ME diets for the first five weeks, but feed intake decreased significantly as dietary ME increased (P<0.05). Feed conversion also improved in chicks fed 3,100 kcal of ME/kg diets compared with those of 3,000, and 3,050 kcal of ME/kg (P<0.05), but was not influenced by dietary protein. Weight gain and feed conversion showed similar tendency for the second five weeks to those of the first five weeks. However, feed conversion improved significantly in 3,100 and 3,150 kcal of ME /kg compared to 3,050 kcal of ME/kg (P<0.05). Dietary protein did not affect the performance at all for this period. Weight gain and feed intake tended to increase in higher ME and lower protein diets from 11 to 15 weeks of age, whereas feed conversion decreased in 3,150 kcal of ME/kg more than 3,000 kcal/kg. No difference was found by CP treatments (P<0.05). There were no interactions in performance, blood composition and meat quality between dietary ME and protein. Further studies need to describe in whole period experiments instead of periodical experiment.
Comparisons of the Carcass Characteristics of Male White Mini Broilers, Ross Broilers and Hy-Line Brown Chicks under the Identical Rearing Condition
Ahn, B.K. ; Kim, J.Y. ; Kim, J.S. ; Lee, B.K. ; Lee, S.Y. ; Lee, W.S. ; Oh, S.T. ; Kim, J.D. ; Kim, E.J. ; Hyun, Y. ; Kim, H.S. ; Kang, C.W. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 149~155
DOI : 10.5536/KJPS.2009.36.2.149
The present study was conducted to compare the carcass yields and meat characteristics of three types of commercial male chicks White mini broilers, Ross broilers and Hy-Line brown chicks under the identical feeding condition. One-hundred 1-d chicks of each type were randomly placed into four pens per group (25 chicks per pen) and fed corn-soybean meal based commercial diets for 35d, 18d or 49d, respectively. At the end of the feeding trial, the birds were sacrificed and subjected to carcass measurements. The dressing percentages of White mini broilers and Ross broilers were significantly higher (P<0.05) than that of Hy-Line brown cockerels. The rate of breast meat of Hy-Line brown cockerels was significantly lower (P<0.05) than those of White mini broilers and Ross broilers. However, Hy-Line brown cockerels showed higher (P<0.05) leg meats than the others. There were no significant differences in serum total cholesterol and the activities of glutamic-oxaloacetic transaminase and glutamic-pyruvic transaminase among the groups. The breast meats of White mini broilers presented highest lightness value. The yellowness of breast and redness of leg meats of White mini broilers and Ross broilers were significantly higher (P<0.05) than those of Hy-Line brown cockerels. There were no significant differences in the SOD-like activity and change of pH in edible meats among the groups. The meat color in White mini broilers was significantly higher than that of Hy-Line brown cockerels. No significant differences were observed in term of flavor, tenderness and overall acceptability. In conclusion, the physico-chemical properties and sensory characteristics of edible meats were not greatly affected by genotype if they were similar body weights and kept under the identical feeding condition. But the Hy-Line brown cockerels were less desirable as a meat-type strain due to lower carcass yields and inferior growth and feed conversion ratio.
A Study on the Amount and Major Compositions of Excreta from Broilers
HwangBo, J. ; Hong, E.C. ; Chung, I.B. ; Kang, K.H. ; Park, H.D. ; Suh, O.S. ; Chung, W.T. ; Jang, S.K. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 157~163
DOI : 10.5536/KJPS.2009.36.2.157
This work was conducted to investigate the amount and major compositions of excreta from broilers. One hundred fifty 1-d-old male and female Ross broilers were used in this work and ten broilers were selected to measure excreta. Average amount of excreta per broiler was 85.4 g, and average moisture content was 76.9%. N,
in excreta were 1.19, 0.29 and 0.49%, respectively. pH,
, and SS were 7.80, 42,134 mg/L, 52,668 mg/L, and 106,669 mg/L, respectively. Pb in poultry excreta was 0.803 mg/kg and highly lowed compared with the standard contents (150 mg/kg). Cd was not founded in excreta. Hg was founded in excreta as 0.002 mg/kg, but it was low compared with the standard level (2 mg/kg).
Early Diagnosis of Fatty Liver-Hemorrhagic Syndrome using Blood Biochemistry in Commercial Layers
So, H.H. ; Jeon, E.O. ; Byun, S.H. ; Mo, I.P. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 165~175
DOI : 10.5536/KJPS.2009.36.2.165
Fatty liver-hemorrhagic syndrome (FLHS) is a common nutritional disease in commercial layers and breeders. The most important clinical sign of FLHS is a sudden drop in egg production and increased mortality which causes significant economic loss in the poultry industry. However, the current diagnostic method for FLHS is based on the gross findings at necropsy which is not helpful to reduce the economic loss because of lateness of diagnosis. Therefore, we need early diagnosis and diagnostic methods before chickens were affected by FLHS. In this study we tried to evaluate the effectiveness of clinical pathology including blood chemistry as an early diagnostic method for FLHS in commercial chickens. Profiles of blood biochemistry were compared between two flocks selected in the same commercial layer farm based on the presence of FLHS clinical sings. A flock with clinical signs of FLHS was designated as FLHS and other flock without clinical signs of FLHS as Non-FLHS. Several parameters of blood biochemistry were selected and compared between FLHS and Non-FLHS to evaluate the possibility of early diagnosis. Average concentrations of serum cholesterol, serum calcium, aspartate aminotransferase (AST), lactate dehydrogenase (LDH) and creatine kinase (CK) were
(IU/L) in Non-FLHS flock, respectively, and
(IU/L) in FLHS flock, respectively. The activities of serum cholesterol, AST and LDH except CK, were significantly higher in FLHS than those in Non-FLHS flock (p<0.05). Some birds of FLHS flock showed 2~17 times greater than in Non-FLHS flock. For the definitive diagnosis of FLHS in the flocks tested for blood chemistry, we analyzed fat content and histological lesion score in the liver sampled from both FLHS and Non-FLHS flock. Average liver fat contents based on dry weight were
(%) in Non-FLHS flock and were
(%) in FLHS flock. These result confirmed that FLHS flock was definitely affected by FLHS. The above results suggest that selected parameters of blood biochemistry, particularly AST, could be useful to diagnose FLHS before significant liver damage occurred in commercial layers.
Production of hTPO Transgenic Chickens using Tetracycline-Inducible Expression System
Kwon, M.S. ; Koo, B.C. ; Kim, D.H. ; Kim, M.J. ; Kim, T. ;
Korean Journal of Poultry Science, volume 36, issue 2, 2009, Pages 177~186
DOI : 10.5536/KJPS.2009.36.2.177
It is well-known that unregulated over-expression of foreign gene may have unwanted physiological or toxic effects in transgenic animals. To circumvent these problems, we constructed retrovirus vector designed to express the foreign gene under the control of the tetracycline-inducible promoter. However, gene expressions in the tetracycline-inducible expression system (Tet system) are not completely regulated but a little leaky due to the inherent defects in conventional Tet-based systems. A more tightly controllable regulatory system can be achieved when the advanced versions (
) of rtTA and a minimal promoter in responsive components (pTRE-tight) are used in combination therein. In this study, we tried to produce human thrombopoietin (hTPO) from various target cells and transgenic chickens using the retrovirus vector combined with Tet system. hTPO is the primary regulator of platelet production and has an important role in the survival and expansion of hematopoietic stem cells. In a preliminary experiment in vitro, higher hTPO expression and tighter expression control were observed in chicken embryonic fibroblast (CEF) cells. We also measured the biological activity of the hTPO using Mo7e cells whose proliferation is dependant on hTPO. The biological activity of the recombinant hTPO from CEF was higher than both its commercial counterpart and hTPO from other target cells. The recombinant retrovirus was injected beneath the blastoderm of non-incubated chicken embryos (stage X). Out of 138 injected eggs, 15 chicks hatched after 21 days of incubation. Among them, 8 hatched chicks were hTPO positive. When the Go transgenic chicken was fed doxycycline (0.5 mg per 1 gram of feed), a tetracycline derivative, hTPO concentration of the transgenic chicken blood was 200 ng/mL. Germline transmission of the transgene was confirmed in sperm of the Go transgenic roosters. These results are informative to establish transgenic chickens as bioreactors for the mass production of commercially valuable and biological active human cytokine proteins.