The quality attributes of thigh meat from a certified meat-type commercial Korean native chicken (WoorimatdagTM, WM) and broiler (Ross, CB) raised under the same environmental conditions, were compared. One-d-old, mixedsex WM (200), 200 broilers each randomly assigned to floor pens (20 chickens per pen). production stages (I, II, III) selected based on similar live weight. crude fat contents lower than those CB. contained higher stearic arachidonic acid but palmitoleic oleic compared color...

The Korean native chickens (Woorimotdak™, KNC) and commercial broilers (Ross, CB) show obvious differences in meat flavor after cooking. To understand the contribution of protein peptide for flavor, 2-dimensional (2-D) gel electrophoresis matrix-assisted laser desorption-ionization time-of-flight (MALDI-TOF) mass spectrometry was performed. A total 16 spots were differentially expressed breast thigh between two breeds. seven represented by different levels KNC CB meat. Among them three...

Objective This study estimated the genetic parameters for body weight gain and growth curve parameter traits in Korean native chicken (KNC). Methods A total of 585 F1 chickens were used along with 88 their F0 birds. Body weights measured every 2 weeks from hatching to 20 age measure at 2-week intervals. For each individual, a logistic model was fitted longitudinal dataset obtain three (α, asymptotic final weight; β, inflection point; γ, constant scale that proportional overall rate). Genetic...

This study was conducted to compare carcass characteristics and physico-chemical meat quality in two different genotype ducks raised under identical feeding rearing conditions. A total of ninety 1-d-old Korean native (KND, n = 45) commercial meat-type (Grimaud, were fed same experimental diets during 56 d 42 d, respectively obtain similar slaughter weights. The diet for starter period contained 20% crude protein (CP) 2,900 kcal nitrogen corrected true metabolizable energy (TMEn)/kg that...

In order to evaluate the genetic diversity and discrimination among five Korean native chicken lines, a total of 86 individuals were genotyped using 150 microsatellite (MS) markers, 15 highly polymorphic MS markers selected. Based on highest value number alleles, expected heterozygosity (He) information content (PIC) for selected ranged from 6 12, 0.466 0.852, 0.709 0.882 0.648 0.865, respectively. Using these calculated distance (Fst), heterozygote deficit lines (Fit) within line (Fis)...

The melanocortin 1 receptor (MC1R) gene is related to the plumage color variations in chicken. Initially, MC1R from 30 individuals was sequenced and nine polymorphisms were obtained. Of these, three six single nucleotide (SNPs) confirmed as synonymous nonsynonymous mutations, respectively. Among selected SNPs genotyped using restriction fragment length polymorphism (RFLP) method 150 five chicken breeds, which identified responding alleles. neighbor-joining phylogenetic tree sequences...

This work was conducted to investigate the performance and meat characteristics of commercial Korean native duck (KND). A total 180 1-d-old ducklings 2-way crossbreds from B lines (from National Institute Animal Science) were used in this divided into 4 groups (3 replicates/group, 15 birds/replicate). The four as AA (A line [♀]×A [♂]), AB [♀]×B BB (Pure strains) BA (B strains strain [♂]). Ducks fed diets based on corn-soybean meal for 0 3 wk (22.4% crude protein [CP], 2,945 kcal/kg...

The aim of this study was to investigate the effect single nucleotide polymorphisms (SNPs) melanogenesis associated transcription factor (MITF) and dopachrome tautomerase (DCT) genes on plumage coloration in Asian native duck breeds. MITF encodes a protein for microphthalmia-associated factor, which regulates development function melanocytes pigmentation skin, hair, eyes. Among tyrosinase-related family genes, DCT is pigment cell-specific gene that plays important roles melanin synthesis...

Korean native chicken (KNC) is a well-known breed due to its superior meat taste. This breed, however, owing low growth rate, has high market price. In order overcome this disadvantage, the National Institute of Animal Science (NIAS) in Korea developed commercial KNC named Woorimatdag version 2 (WM2), an upgraded (WM1) and WM2 was created by crossing with type breeds. study aims discriminate between other breeds using microsatellite (MS) markers. A total 302 individuals from eight...

본 시험은 토종오리 육용종의 생산성과 도체수율을 조사하기 위해 수행하였다. 공시동물은 A와 B계통 육용종 토종오리에서 발생한 오리 병아리를 암수 각각 210수씩 선별하여 총 420수를 이용하였다. 시험 설계는 농장에 따른 2처리구(A, B)와 성별에 2처리구(암, 수)로 나누어 <TEX>$2{\times}2$</TEX>의 복합요인으로 4처리구, 처리구당 7반복, 반복당 15수씩 완전임의 배치하였다. 주령별 체중은 계통 간 비교에서 2, 4, 6 및 8주령에 체중의 차이가 없었으나(P>0.05), 따라서는 2주령에 암컷, 수컷의 체중이 높았다(P<0.01). 일일 사료 섭취량은 6~8주령에 섭취량이 높았다(P<0.05). 증체량은 간에 유의적인 없었으나, 비교에서는 수컷이 계통에 차이는 없었으며(P>0.05), 암컷에 비해 요구율은 없었으며, 0~2주령에암컷(P<0.05), 6~8주령에수컷이 계통과 주령에 생체중과 도체중은 8주령 B계통에서 가장 높았으며(P<0.01),...

Shank skin color of Korean native chicken (KNC) shows large variations. It varies from white, yellow, green, bluish or grey to black, whilst in the majority European breeds shanks are typically yellow-colored. Three shank color-related traits (i.e., lightness [L*], redness [a*], and yellowness [b*]) were measured by a spectrophotometer 585 progeny 68 nuclear families KNC resource population. We performed genome scan linkage analysis identify loci that affect quantitatively KNC. All these...

토종닭과 일반 육계의 차이점을 확인하기 위하여 육계를 동일한 사육 조건에서 사육하고, 2.0 kg 내외의 시기인 13주령에 맞추어 육계도 도계하여 다소비 부위인 가슴육과 다리육을 분리하여 이화학적 차이를 분석하였다. 가슴육 및 다리육에서 조지방의 함량이 토종닭의 조지방 함량보다 유의적으로 높게 나타났다. pH는 다리육 모두 토종닭보다 육계에서 나타났으나, 보수력과 명도는 큰 차이가 없었다. 그러나 가슴육에서 적색도가 높은 것으로 확인되었다. 조직감의 경우에 있어서는 신선 다리육의 씹힘성이 토종닭에서 나타난 것 이외에는 육계간의 콜라겐 함량은 경우, 6.78 mg/g으로 육계(3.12 mg/g)보다 2배 이상 값을 나타내었다. 결론적으로 동일하게 사육한 13주령의 육계는 비교하여 지방 너무 많고 적기 때문에 토종닭과는 유의적인 보였다. 이는 같은 조건으로 사육한다고 하더라도 육질이 유사해질 수 없음을 의미한다. Broilers were raised as the same...

본 연구는 토종닭 재래종과 토착종의 교잡을 통하여 생산된 교잡종의 성장과 산란능력을 추정하여, 새로운 품종을 개발하는데 활용하기 위하여 실시되었다. 적갈색과 황갈색의 재래계와 육용종 및 산란겸용종을 2원 교배를 발생한 암평아리 375수를 공시하여, 36주령까지 시험을 실시하였다. A 수정율은 94.9%로 다른 교잡종에 비해 높게 나타났으나, 교잡종간 유의적 차이는 없었으며, 부화율에서는 C 교잡종이 60.2%로 가장 낮게 나타났다. 교잡종별 체중을 살펴보면, D 비하여 나타났으며, B와 교잡종은 전 기간 동안 유의적으로 우수한 경향을 보였다(p<0.05). 사료 섭취량의 경우, 낮은 보였으며, 체중과 유사한 나타내었다. 요구율은 16주령까지 증가하는 요구율이 낮았다(p<0.05). 교배 조합에서 산란성이 계통을 활용한 조합의 산란율이 시험 종료 시까지 The goal of this study was to evaluate the growth performance...

The use of Korean native chicken is increasing, and the discovery new genetic resources very important from both economic conservation points view. In this study, mtDNA D-loop sequences 272 privately-owned chickens a Hyunin farm were investigated. Seventeen nucleotide substitutions identified sequence analysis they classified as 6 haplotypes. Previously investigated haplotypes in five populations have been compared with population. results indicated that two haplotypes, H10 H15, population...

There are multiple experiments conducted with male Korean native ducks (KND) to evaluate the optimal levels of limiting amino acids (AA). In Exp. 1, a total 450 one-d-old KNDs were divided into five groups six replicates and fed experimental diets varying lysine, sulfur (TSAA) threonine (T1, 0.90/0.74/0.70%; T2, 1.00/0.82/0.77%; T3, 1.10/0.90/0.85%; T4, 1.20/0.98/0.93%; T5, 1.30/1.07/1.01%) 21 d age. 2, KND received commercial starter diet from hatching age, then one TSAA, 0.73/0.62/0.54%;...

본 시험은 토종오리 대형종의 육성기 성적을 조사하기 위해 수행하였다. 공시동물은 A와 B계통 대형종 토종오리에서 발생한 오리 병아리를 암수 각각 210수씩 선별하여 총 420수를 이용하였다. 시험설계는 계통에 따른 2처리구(A, B)와 성별에 2처리구(암, 수)로 나누어 <TEX>$2{\times}2$</TEX>의 복합요인으로 4처리구, 처리구당 3반복, 반복당 35수씩 완전임의 배치하였다. 4처리구의 비교에서는 4주령 이후부터 수컷의 체중이 가장 높았다(P<0.05). 계통간의 전 주령에서 B계통이 A계통에 비해 높았으며(P>0.05), 암컷에 0주령부터 8, 12, 16주령 및 20주령까지의 증체량은 수컷에서 계통간 기간에서 사이에 차이가 없었으며, 0~4주령에서 없었으나(P>0.05), 16 20주령까지는 증체량이 4주령, 12주령, 누적사료 섭취량은 섭취량이 사료 요구율은 수컷이 높았고(P<0.05), 0~8주령 0~12주령에서는 A계통 암컷이 0~8주령에암컷,...

본 시험은 한국 재래계와 토착종의 2원 교배를 통하여 생산된 실용계 생산성을 연구하고자 수행하였다. 5가지 교배조합으로 생성된 암 수평아리를 각각 30수씩 총 300수를 선별하였으며, 5개의 교배조합은 A) 재래종 R계통 <TEX>${\times}$</TEX> 토착육용종 S계통, B) 토착겸용종 D계통 H계통, C) D) C계통 Y계통, E) Y계통 H계통이다. 교잡종별 증체량은 A와 C 교잡종에서 전반적으로 높은 경향을 나타내었으며, D 교잡종의 다른 계통에 비하여 유의적으로 낮은 보였다(p<0.05). 사료 섭취량의 경우도 증체량과 유사하였으며, 요구율은 전 기간에서 교잡종이 나타내었다(p<0.05). 도체중 및 도체율은 낮았으며, 도체중이 7주령과 10주령에서 가장 높았으며, 13주령에서는 A 우수한 부분육 생산 비율은 다리 30.60~33.75%, 가슴 21.48~24.72%, 날개 11.95~14.33%, 등 21.91~25.83%, 목 7.38~8.72%로 다리의...

Using differential display reverse transcriptase polymerase chain reaction, we detected 11 differentially expressed genes between top round and loin muscle in Korean cattle (Hanwoo). In the muscle, lightness (L*) value (P < 0.01) marbling fat content 0.01), which are important factors determining meat quality, were higher than muscle. Three of validated as significant two types by real-time reaction 0.05). To determine whether three associated with quality traits, a regression analysis was...

The maternally inherited mitochondrial DNA (mtDNA) D-loop region is widely used for exploring genetic relationships and investigating the origin of various animal species. Currently, domestic ducks play an important role in protein supply. In this study, partial mtDNA sequences were obtained from 145 samples belonging to six South-East Asian duck populations commercial population. All these closely related mallard (Anas platyrhynchos), as indicated by their mean overall distance. Sixteen...