• 대한수의학회지
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• 제10권1호
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• pp.1-4
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• 1970

Experiments were carried out in order to study the relationship of thyroid activity to growth potentiality in chicken. Further work was also performed to determine thyroid secretion rate and body gain of the different sexes. A correlation coefficient of 0.241 in the male and 0.237 in the female were obtained between daily gains and daily thyroid $^{131}I$ out put rate in the chicken. The correlation was not statistically significant, but the chicken with a lower thyroid activity tended to gain faster than those with a higher thyroid activity. The average daily gain of the female(12.13 gram) was significantly higher than the male (9.28 gram). The average daily thyroid secretion rate of male tended to have a higher rate, but it was not statistically significant.

• Journal of Animal Science and Technology
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• 제46권2호
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• pp.145-154
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• 2004

본 연구에서는 57,316두의 농장 검정된 돼지 자료를 이용하여 유전 모수를 추정하였다. 현재 돼지 등급 제도가 도체 위주로 진행되고 있어 농장의 경제적 이익을 고려한다면, 향후 경제 가치를 고려한 정확한 선발 지수를 설정하여 정확히 추정된 육종가를 바탕으로 국가 단위 개량체계가 확립되어야 유전적 개량을 이룰 수 있을 것으로 사료된다. 조사된 형질들에 대한 유전력은 품종에 따라 다소의 차이는 있었지만, 평균 등지방 두께에 대하여 0.46${\sim}$0.65, 최후 늑골 등지방 두께에 대하여 0.42${\sim}$0.61, 등심 깊이에 대하여 0.28 ${\sim}$0.31, 정육율에 대하여 0.50${\sim}$0.60, 일당 증체량에 대하여 0.45${\sim}$0.55, 90kg 도달 일령에 대하여 0.38${\sim}$0.50 및 100kg 도달 일령에 대하여 0.40～0.50의 범위에서 추정되었다. 추정된 유전력이 일반적으로 알려진 형질들의 유전력과 유사하고, 성별 및 품종별로 뚜렷한 일관성을 나타내는 것으로 미루어 다형질 개체 모형 하에서 DF-REML에 의한 유전력의 추정이 효과적인 것으로 생각된다. 조사된 형질의 유전력은 도체 형질에 대해서는 중도의 유전력을 보였으며 나머지 성장 형질에 있어서는 고도의 유전력을 나타냈다. 본 연구의 결과로 미루어 성장 형질에 대한 개량이 유의적으로 이루어 질 수 있음을 나타내었다. 등지방 두께, 일당 증체량 및 90kg 도달 일령간의 유전 상관은 그다지 높지는 않았지만 이들 형질간에 유전적 관계가 있는 것으로 나타났으나, 이들간의 작용 방향이 서로 바람직하지 않은 상관 관계를 가지는 경우가 있어, 어느 한 형질에 치우친 선발은 다른 형질을 불량하게 할 수 있음을 보였다. 등 부위 등지방 두께와 등심 깊이간의 상관이 Duroc 종과 타 품종간에 차이가 있을 뿐 다른 형질에서는 품종간의 차이를 나타내지 않았다. 등심 깊이의 경우 성장 형질이 우수할 수록 넓은 경향을 보였으나 정육율의 경우는 정 반대의 상관을 나타냈다. 반면에 등심 깊이와 정육율의 경우에는 낮은 정의 상관 관계를 나타내어 이들 형질을 다같이 개량하기 위해서는 선발 지수식에 의한 조화있는 개량이 필요한 것으로 사료된다. 표현형 상관에 있어서도 유전 상관과 비슷한 결과가 추정되었다.

• 농업과학연구
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• 제49권1호
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• pp.93-102
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• 2022

This study was conducted to evaluation the effects of dietary soybean meal (SBM) and fermented soybean meal (FSBM) on the growth performance of Korean native cattle as Hanwoo calves (Bos taurus coreanae) and Holstein cows. In total, 16 calves three to four months old (Control group, SBM: 5 males and 3 females, average weight 105.7 kg; Experimental group, FSBM: 5 males and 3 females, average weight 103.7 kg) were fed 5% of the feed amount for 53 days. In terms of growth performance outcomes, the average gain body weight was significantly higher in the FSBM group than in the SBM group in the final fattening period. The average daily gain in body weight (ADGBW) for the FSBM group was higher than that of the SBM group in the final fattening period. The average gain body weight in four months for FSBM was higher than that at three months in the final fattening period. Diarrhea incidence for FSBM was significantly decreased compared to that in the SBM group in the six-week period after weaning. These results indicate that dietary FSBM can improve the growth rate and health condition during the calving period. Holstein cows fed fermented soybean meal had higher milk urea nitrogen levels and decreased somatic cell counts compared to those fed SBM. These results may be closely related with the increased average daily gain body weight associated with dietary FSBM.

• 농업과학연구
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• 제20권1호
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• pp.48-55
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• 1993

본 연구(硏究)는 1986년부터 1990년까지 충청남도(忠淸南道) 도립종축장(道立種畜場)에서 사육된 Landrace, Large Yorkshire 및 Duroc종의 후보종 모돈 115두의 이유후 형질(形質)에 대한 능력검정(能力檢定) 자료를 근거로 최소자승법을 이용하여 품종(品種), 산차(産差), 분만년도(分娩年度) 및 분만월(分娩月)이 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수에 미치는 효과(效果)를 추정(推定)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 이유후형질(形質)의 전체평균은 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수(選拔指數)에서 각각 $922.25{\pm}17.25$g, $2.85{\pm}0.04$, $2.03{\pm}0.04$cm, $135.44{\pm}1.38$일 및 $168.33{\pm}2.42$이었다. 2. 품종의 효과(效果)에 있어서는 일당증체량(日當增體量), 90kg도달일령 및 선발지수(選拔指數)에서 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방두께에 있어서도 유의차(P<0.05)가 나타났다. 품종별로는 Duroc종이 일당증체량(日當增體量), 90Kg도달일령및 선발지수(選拔指數)에서는 각각 977.23g, 132.47일 및 172.35로 가장 우수하였고, 등지방층두께는 Landrace종이 1.95cm로 가장 얇었다. 3. 산차(産差)의 효과(效果)에 있어서 일당증체량(日當增體量)은 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방층두께 및 선발지수(選拔指數)에서도 유의차(有意差)(P<0.05)가 인정되었고, 산차(産差)로는 일당증체량(日當增體量) 및 선발지수(選拔指數)가 3산차(産差)와 4산차(産差)에서 각각 974.92g, 177.61, 959.48g 및 1774.84로 가장 우수하였다. 4. 분만년도의 효과(效果)에 있어서는 일당증체량(日當增體量), 사료요구율 및 선발지수(選拔指數)에서 고도의 유의차(P<0.01)가 인정되었으며, 분만월에 있어서도 일당증체량(日當增體量)에서 고도의 有意差(P<0.01)가 인정되었고, 등지방층두께 및 선발지수(選拔指數)에서는 유의차(有意差)(P<0.05)가 있었으며, 분만월별로는 3월분만이 일당증체량 및 선발지수(選拔指數)에서 각각 968.22g, 174.54로 가장 우수하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제12권5호
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• pp.677-681
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• 1999

Estimates were made of genetic parameters for average daily gain (ADG) and average backfat thickness (ABF), and of the effect of sex on estimates of variance-covariance components for average daily gain of boars (DGM) and gilts (DGF) and average bacfat thickness of boars (BFM) and gilts (BFF) by residual maximum likelihood (REML) under a bivariate animal model. Data included a total of 2233 records (757 for boars and 1476 for gilts) of the Large White breed born between 1981 and 1986 in Miyazaki and Iwate prefectures in Japan. Heritability estimates for ADG and ABF were 0.43 and 0.69, respectively, with a genetic correlation of -0.08. Heritability estimates for DGM and DGF were 0.54 and 0.46, respectively, with a genetic correlation of 0.79, including that the two traits are influenced by similar but not identical genes. Respective estimates for BFM and BFF were 0.71 and 0.72 with a genetic correlation of 0.95, indicating that identical genes influence backfat thickness in boars and gilts.

• Asian-Australasian Journal of Animal Sciences
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• 제30권10호
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• pp.1464-1470
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• 2017

Objective: This study investigated the effect of fermented biogas residue (FBR) of wheat on the performance, serum biochemical parameters, and meat quality in pigs. Methods: We selected 128 pigs (the mean initial body weight was $40.24{\pm}3.08kg$) and randomly allocated them to 4 groups (1 control group and 3 treatment groups) with 4 replicates per group and 8 pigs per pen in a randomized complete block design based on initial body weight and sex. The control group received a corn-soybean meal-based diet, the treatment group fed diets containing 5%, 10%, and 15% FBR, respectively (abbreviated as FBR5, FBR10, and FBR15, respectively). Every group received equivalent-energy and nitrogen diets. The test lasted 60 days and was divided into early and late stages. Blood and carcass samples were obtained on 60 d. Meat quality was collected from two pigs per pen. Results: During the late stage, the average daily feed intake and average daily gain of the treatment groups was greater than that of the control group (p<0.05). During the entire experiment, the average daily gain of the treatment groups was higher than that of the control group (p<0.05). Fermented biomass residue did not significantly affect serum biochemical parameters or meat quality, but did affect amino acid profiles in pork. The contents of Asp, Arg, Tyr, Phe, Leu, Thr, Ser, Lys, Pro, Ala, essential amino acids, non-essential amino acids, and total amino acids in pork of FBR5 and FBR10 were greater than those of the control group (p<0.05). Conclusion: These combined results suggest that feeding FBR could increase the average daily gain and average daily feed intake in pigs and the content of several flavor-promoting amino acids.

• Journal of Animal Science and Technology
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• 제44권5호
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• pp.523-530
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• 2002

본 연구는 1999년 8월부터 2000년 2월까지 공인 제2종돈능력검정소에서 검정 종료된 Duroc종, Landrace종 및 Yorkshire종에 대하여 체중, 등지방두께, 일당증체량 및 정육율을 측정하여, 동일 개체의 반복측정치 간의 반복력과, 상관 및 순위상관을 추정하였으며, 그 결과를 요약하면 다음과 같다. 1. 평균능력은 측정시 체중이 각각 91.0, 114.7, 123.2kg이였으며, 측정시 일령은 각각 142.1, 173.7, 182.5일이였으며, 정육율은 각각 57.9, 56.2, 55.2%였으며, 등지방두께는 각각 1.33, 1.61, 1.63cm였으며, 일당증체량은 각각 946.6, 879.2, 879.4g으로 나타났다. 2. 각 형질의 측정차수간 상관은 정육율의 경우, 1차와 2차, 1차와 3차, 2차와 3차간 각각 0.493, 0.471, 0.619로 나타났고, 등지방두께의 경우, 각각 0.424, 0.424, 0.700으로 나타났으며, 일당증체량의 경우, 각각 0.716, 0.601, 0.861로 모든 형질에서 1차와 2차간, 1차와 3차간 보다는 2차와 3차간에 높게 추정되었다. 3. 각 측정차수의 형질간 상관은 1차 측정의 경우, 정육율과 등지방두께, 정육율과 일당증체량, 등지방두께와 일당증체량이 각각 －0.597, －0.291, 0.303으로 나타났고, 2차 측정의 경우, 각각 －0.667, －0.292, 0.396으로 나타났으며, 3차 측정의 경우, 각각 －0.711, －0.369, 0.409로 정육율과 등지방두께 및 일당증체량은 부의 상관관계에 있으며, 등지방두께와 일당증체량은 정의 상관관계에 있고, 일령이 증가할수록 상관이 높게 추정되었다. 4. 각 형질의 반복력 추정치를 살펴보면, 등지방두께가 0.374, 정육율이 0.428, 일당증체량이 0.673으로 추정되었으며, 일당증체량의 반복력은 상당히 높게 추정되어, 110kg까지 검정의 필요성이 인정되지 않으나, 등지방두께와 정육율의 추정치는 낮게 추정되어 더욱 많은 연구가 필요할 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권10호
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• pp.1440-1443
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• 2001

Forty eight $Duroc{\times}Yorkshire{\times}Landrace$ pigs ($15.2{\pm}0.3kg$ average initial BW) were used conducted to evaluate the effects dietary phytase (Phytezyme, WOOJIN, Co. Ltd) supplementation on the growth performance and nutrient digestibility in growing pigs. There were three pigs per pen and four pens per treatment. Treatments were 1) Con (corn-wheat-SBM), 2) PE0.1 (low-P iet+0.1% Phytezyme), 3) PE0.2 (Iow-P diet+0.2% Phytezyme), 4) PE0.3 (low-P diet+0.3% Phytezyme). During d 0 to 28, average daily gain was not significantly different among the treatments. Pigs fed PE0.3 diet significantly decreased (p<0.05) their average daily feed intake compared to pigs fed Con diet. Also, gain/feed in pigs fed PE0.1 and PE0.3 diet was improved (p<0.05) compared to pigs fed Con and PE0.2 diet (p<0.05). For d 28 to 56, pigs fed PE0.2 diet grew significantly faster (p<0.05) than pigs fed Con and PE0.1 diet. Gain/feed was greater (p<0.05) for PE0.2 and PE0.3 treatments than for Con. For overall period, average daily gain was increased (P<0.05) by the addition of 0.2% Phytezyme compared with Con. Gain/feed was significantly improved (p<0.05) by supplementation of PE0.3. Pigs fed PE0.2 showed increased DM and N digestibilities compared to pigs fed other treatments. Supplemented diets PE0.2 and PE0.3 improved (p<0.05) the apparent digestibility of Ca and P compared to other treatments. In conclusion, the results obtained from these feeding trials suggest that the Phytezyme supplementation of diets for growing-finishing pigs had improved growth performance and nutrient availability.

• Asian-Australasian Journal of Animal Sciences
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• 제25권9호
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• pp.1255-1261
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• 2012

Thirty two Holstein female calves (initial body weight = $40{\pm}3.0$ kg) were used to investigate the effects of probiotic and prebiotic on average daily gain (ADG), fecal E. coli count, white blood cell count, plasma IgG1 level and cell-mediated immune response to injection of phytohemagglutinin in suckling female calves. Calves were assigned randomly to one of the four treatments, including whole milk without additives (control), whole milk containing probiotic, whole milk containing prebiotic and whole milk containing probiotic and prebiotic (synbiotic). Average daily gain was greater in calves fed probiotic, prebiotic and synbiotic at weeks 6, 7 and 8 (p<0.05). E. coli count was significantly lower in calves fed probiotic, prebiotic and synbiotic on d 56 (p<0.05). There was no significant difference between treatments in blood samples and cell-mediated response. This study showed that addition of probiotic, prebiotic and combination of these additives to milk enhanced ADG and reduced fecal E. coli count in preruminant calves.

• Asian-Australasian Journal of Animal Sciences
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• 제24권10호
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• pp.1329-1334
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• 2011

The Hinai-dori is a breed of chicken native to Akita Prefecture, Japan. An $F_2$ resource population produced by crossing low- and high-growth lines of the Hinai-dori breed was analyzed to detect quantitative trait loci (QTL) for growth traits. Highly significant QTLs for body weight at 10 and 14 weeks of age and average daily gain between 4 and 10 weeks and between 10 and 14 weeks of age were accordingly mapped in a common region between ADL0198 and ABR0287 on chromosome 1 and between MCW0240 and ABR0622 on chromosome 4, respectively. A significant QTL for body weight at 4 weeks of age and a significant QTL for average daily gain between 0 and 4 weeks of age were mapped for the first time to the same region flanking ABR0204 and ABR0284 on chromosome 1. These QTLs are good candidates for application in the development of marker-assisted selection strategies for increasing growth efficiencies in the Hinai-dori breed and native breeds of chickens in Asia.