• Title/Summary/Keyword: 재래닭

Search Result 149, Processing Time 0.032 seconds

Establishment of Korean Native Chicken Auto-Sexing Lines Using Sex-Linked Feathering Gene (한국토종닭의 깃털 발육성 반성 유전자를 이용한 자가성감별 계통 조성)

  • Kwon, Jae Hyun;Choi, Eun Sik;Sohn, Sea Hwan
    • Korean Journal of Poultry Science
    • /
    • v.48 no.1
    • /
    • pp.41-50
    • /
    • 2021
  • Although feather-sexing using sex-linked genes related to feather development is a widely used chick sexing method in the poultry industry, the feather-sexing method has yet to be used for Korean native chickens (KNCs). The purpose of this study was to construct a KNC feather-sexing line using early-feathering (EF) and late-feathering (LF) genes for industrial application. Using 557 reddish-brown KNCs as the basal flock, frequencies of the EF (k) and LF (K) genes were estimated to be 0.814 and 0.186, respectively. This indicating that it would be feasible to construct a feather-sexing line using this chicken group, and we accordingly constructed EF paternal and LF maternal lines. On the basis of test-cross for the selection of LF homozygous (KK) males in the maternal line, we confirmed that three of 40 chickens were homozygous males. The survival rate, body weight, days at first egg-laying, hen-day egg production, and egg weight were analyzed to compare the production performance of EF and LF chickens. The results revealed that EF chickens were characterized by a superior survival rate, whereas LF chickens were superior in terms of egg production rate. However, no differences between LF and EF chickens were detected with respect to other production performance parameters. In addition, assessment of the fitness of sexed chicks produced in the established KNC feather-sexing lines revealed that the accuracy of sexing was 98.6%. Collectively, these findings indicate the feasibility of constructing effective KNC feather-sexing lines with potential industrial application.

Genetic Variability of mtDNA D-loop Region in Korean Native Chickens

  • Hoque, Md. Rashedul;Jung, Kie-Chul;Park, Byung-Kwon;Choi, Kang-Duk;Lee, Jun-Heon
    • Korean Journal of Poultry Science
    • /
    • v.36 no.4
    • /
    • pp.323-328
    • /
    • 2009
  • In order to determine the origin and genetic diversity among chicken breeds, mitochondrial (mt) DNA D-loop sequences have been widely used. In this study, 41 individuals from four breeds (Korean native chicken (Black and Brown) and two imported breeds, Rhode Island Red and Cornish) were used for identifying genetic relationships with other chicken breeds. We obtained ten haplotypes and the highest number of haplotype was represented by eight individuals each from haplotype 1 and haplotype 2. Neighbor-joining phylogenetic tree indicates that the black and brown Korean native chicken breeds were mixed in haplotype 2 and they were closely related with the red jungle fowl (Gallus gallus). We also investigated whether the D-loop hypervariable region in chicken mtDNA can be used for the breed identification marker. The results indicated that the combination of the SNPs in the D-loop region can be possibly used for the breed discriminating markers. The results obtained in this study can be used for designing proper breeding and conservation strategies for Korean native chicken, as well as development of breed identification markers.

The Evaluation of Various Conditions in the Cryopreservation of Primordial Germ Cells on Korean Native Chicken (Ogye) (한국재래닭(오계)의 원시 생식 세포의 냉동 보존에 있어서 여러 조건의 평가)

  • Kim, Hyun;Cho, Young Moo;Han, Jae Yong;Choi, Sung Bok;Byun, Mi Jeong;Kim, Young Sin;Ko, Yeoung-Gyu;Seong, Hwan-Hoo;Kim, Sung Woo
    • Korean Journal of Poultry Science
    • /
    • v.41 no.4
    • /
    • pp.249-259
    • /
    • 2014
  • Cryopreserving cells which are maintaining their viability are the very complex process. This study has been carried out in order to find the effects of cryopreservation steps and freezing media on the rates of viability of cryopreserved chicken primordial germ cells (PGCs). PGCs obtained from the germinal gonade of 5.5~6 day (stage 28) chick embryos of Korean Ogye (KO) and Commercial breeds (C), using the MACS method were suspended in a freezing medium containing a freezing and protecting agents (e.g. dimethyl sulfoxide (DMSO), ethylene glycol (EG) and propylene glycol (PG)). Gonads were harvested from stage 28 chick embryos and pooled in groups of 5, 10, 15, 20E embryos, contributing gonads to the cell suspension. The gonadal cells, including PGCs, were then frozen in 1 of the following cryoprotectant treatments : 2.5%, 5%, 10%, 15% and 0% cryoprotectant (DMSO, EG, PG) as a control. Effects of exposure to slow freezing and vitrification, with different concentrations of the cryoprotectant solution, were examined. After vitrification and slow freezing, survival rates of the frozen-thawed PGCs from the 10% EG plus FBS treatment were 85.63%, and 66.14% (p<0.05), respectively. The viability of PGCs after freeze-thawing was significantly higher for 10% EG plus FBS treatment than for 10% PG + FBS treatment (p<0.05) (85.63% vs 66.81%) by vitrification. This study established a method for preserving chicken PGCs that enables systematic storage and labeling of cryopreserved PGCs in liquid ($LN_2$) at a germplasm repository and ease of entry into a data base. In the future, the importance for this new technology is that poultry lines can be conserved while work is being conducted on improving the production of germline chimeras.

Production Traits and Stress Responses of Five Korean Native Chicken Breeds (한국토종닭 5품종의 생산능력 및 스트레스 반응 정도)

  • Cho, Eun Jung;Choi, Eun Sik;Jeong, Hyeon Cheol;Kim, Bo Kyung;Sohn, Sea Hwan
    • Korean Journal of Poultry Science
    • /
    • v.47 no.2
    • /
    • pp.95-105
    • /
    • 2020
  • This study presents the production characteristics and physiological characteristics of five Korean native chicken (KNC) breeds consisting of Hwanggalsaek Jaeraejong (HJ), Korean Rhode Island Red (KR), Korean White Leghorn (KL), Korean Brown Cornish (KC), and Korean Ogye (KO). We investigated their production performances, vitalities, and stress responses. We measured the survival rate, body weight, age at first egg-laying, hen-day egg production, egg weight, amount of telomeric DNA, heterophil-lymphocyte ratio (H/L ratio), and heat shock protein (HSP)-70, HSP-90α and HSP-90β gene expression levels for 493 KNCs. The survival rate was highest in KR, and lowest in KO. Body weights were steadily high in the order of KC, KR, HJ, KO and KL. Average hen-day egg production was highest in KL, and lowest in KC. While the amount of telomeric DNA was highest in KR, and lowest in KC. Furthermore, both the H/L ratio and the HSP-90β gene expression level were highest in KC, and lowest in KR. These results indicated that the KR breed was highly resistant to stress, whereas KC was more susceptible to stress. Taken together, it is considered that with improvements the KC breed would be more suited to be used as a Korean broiler breed while KL would be more appropriately used as a Korean layer breed. In addition, it is considered that the KR breed is appropriate to be used as a maternal chicken breeder based on good production capacity and excellent robustness, while the HJ breed is desirable to be improved as a high-quality Korean meat breed based on its excellent meat quality.

A TCP-like flow control algorithm for RTP/RTCP (TCP 와 RTP/RTCP 유사한 흐름제어 알고리즘)

  • 나승구;윤성덕;안종석
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 1998.10a
    • /
    • pp.480-482
    • /
    • 1998
  • 최근, 멀티캐스트 기법을 사용하는 멀티미디어 응용 프로그램들이 인터넷에 등장하고 있다. 이들 응용 프로그램들의 성공 여부는 수신자들에게 전송되는 음성/영상의 품질에 의해 좌우된다. 인터넷은 응용프로그램의 QoS(Quality of Service) 에 대한 요구를 보장할 수 없기 때문에 멀티케스트 트래픽(multicast traffic)을 위하여 인터넷의 성능을 최대한 효율적으로 이용할 수 있도록 흐름제어에 대한 많은 연구가 진행되고 있다. 그 중 IVS(INRIA Video conferencing System)에서 제안한 멀티캐스트 트래픽 흐름제어 알고리즘은 수신자가 주기적으로 전달하는 RTCP 의 패킷손실 정보에 의해 송신자가 전송율을 조절하는 것이다. 그러나 이 알고리즘은 네트워크 상태가 무부하(unload)임에도 불구하고 느린 피드백으로 인하여 가용 네트워크 대역폭을 빠르게 파악하지 못하기 때문에, TCP트래픽과 경쟁 상태에서 네트워크 대역폭을 불공정(unfairness)하게 사용하게 되고 네트워크 상태에 알맞는 전송율을 결정하지 못한다. 본 논문에서는 더욱 공정하게 대역폭을 공유할 수 있고 전체 링크 이용율을 높이는 두 가지 기법을 제안한다. 첫째, 측정된 네트워크 혼잡상태에 따라 RTCP 피드백의 전송 빈도를 동적으로 조절하는 것이다. 둘째, TCP와 같이 전송율을 증가/감소시킴으로써 공정하게 네트워크를 공유하도록 하는 것이다. 본 논문에서는 이 두 가지 기법들이 TCP 트래픽에 영향을 주지 않고 또한 RTCP피드백의 양을 증가시키지 않으면서도 공정하게 네트워크 대역폭을 공유함으로써 링크의 이용율을 높일 수 있다는 것을 시뮬레이션을 통하여 보여준다.안 모니터링 기 능 등으로 조사되었다.도 멜-켑스트럼을 사용한 경우 67.5%, K-L계수를 사용한 경우 75.3%로 7.8%의 향상된 인식률을 보였으며 K-L계수와 회귀계수를 결합한 경우에서도 비교적 높은 인식률을 보여 숫자음에 대해서도 K-L계수의 유효성을 확인할 수 있었다..rc$ 구입할 때 중점적으로 살펴보는 사항은 신선도와 순수재래종 여부, 위생상태였다. 한편 소비자가 언제나 구입할 수 없다는 의견이 85.2%나 되어 원활한 공급과 시장조성이 아직 정착되지 않고 있었다. $\bigcirc$ 현재 유통되고 있는 재래종닭은 소비자 대부분이 잡종으로 인식하고 있었으며, 재래종과 일반육계와의 구별은 깃털색, 피부색, 정강이색등 외관상으로 구별하고 있었다. 체중에 대한 반응은 너무 작다는 의견이었고, 식품으로의 인식도는 비교적 고급식품으로 인식하고 있다. $\bigcirc$ 재래종닭고기의 브랜드화에 대한 견해는 젊고 소득이 높은 계층에서 브랜드화의 필요성을 강조하고 있다. $\bigcirc$ 재래종달걀의 소비형태는 대부분의 소비자가 좋아하였으나 아직 먹어보지 못한 응답자가 많았다. 재래종달걀의 맛에 대해서는 고소하고 독특하여 차별성을 느끼고 있었다. $\bigcirc$ 재래종달걀의 구입장소는 계란판매점(축협.농협), 슈퍼, 백화점, 재래닭 사육 농장등 다양하였으며 포장단위는 10개를 가장 선호하였고, 포장재료는 종이, 플라스틱, 짚의 순으로 좋아하였다. $\bigcirc$ 달걀의 가격은 200원정도를 적정하다고 하였으며, 크기는 (평균 52g)는 가장 적당하다고

  • PDF

The Effect of Modified Cryopreservation Method on Viability of Frozen-thawed Primordial Germ Cell on the Korean Native Chicken (Ogye) (한국재래닭 (오계) 원시생식세포에 있어 동결방법의 개선이 융해 후 생존율에 미치는 영향)

  • Kim, Hyun;Kim, Dong Hun;Han, Jae Yong;Choi, Sung Bok;Ko, Yeoung-Gyu;Do, Yoon Jung;Seong, Hwan-Hoo;Kim, Sung Woo
    • Journal of Animal Science and Technology
    • /
    • v.55 no.5
    • /
    • pp.427-434
    • /
    • 2013
  • This study was conducted to establish methods for preserving chicken primordial germ cells (PGCs) for long-term storage in liquid nitrogen and for developmental engineering or preservation of species. The purpose of this study is to clarify the effects of fetal bovine serum (FBS) or chicken serum (CS) treatment on the viability of cryopreserved PGCs from Korean Native Chicken (Ogye). PGCs separated from a germinal gonad of an early embryo at day 5.5-6 (stage 28) were suspended in a freezing medium containing freezing and protective agents (dimethyl sulfoxide (DMSO), ethylene glycol (EG) and glycerol). The values from 0, 5, 10, and 15 % DMSO plus FBS treatment were 21.6, 30.36, 36.42, 50.39, and 48.36 %, respectively. The viability of PGCs after freeze-thawing was significantly higher for 10% EG plus FBS treatment than for 10% EG + FCS treatment (p<0.05) (64.36% vs. 50.66%). This study establishes a method for preserving chicken PGC that enables systematic storage and labeling of cryopreserved PGC in liquid nitrogen at a germplasm repository and an ease of entry into a database. In the future, the importance for this new technology is that poultry lines can be conserved while work is being conducted to improve the production of germline chimeras.

Comparison for Genetic Diversity between Korean Native Commercial Chicken Brand Groups using Microsatellite Markers (Microsatellite Marker를 활용한 토종닭 브랜드 집단 간의 유전적 다양성 분석)

  • Lee, Hak-Kyo;Oh, Jae-Don;Park, Chan-Ho;Lee, Kun-Woo;Lee, Jun-Heon;Jeon, Gwang-Joo;Kong, Hong-Sik
    • Korean Journal of Poultry Science
    • /
    • v.37 no.4
    • /
    • pp.355-360
    • /
    • 2010
  • To estimate the genetic characteristics within two brands of Korean native commercial chicken, we used a total of 302 genomic DNAs from two groups (Woorichicken: 152, Hanhyup3chicken: 150). Sizes of 10 microsatellite markers were decided using GeneMapper Software (v.4.0) after analyzing ABI 3130. Genetic diversity indices including expected heterozygosity (Ex H), observed heterozygosity (Ob H) and polymorphism information content (PIC). Frequencies of microsatellites markers were used to estimate heterozygosities and genetic distances. LEI0073 showed the highest value in all genetic diversity (Ex H, Ob H and PIC). On the other hand, MCW322 showed the lowest value in all genetic diversity. The calculated genetic distance of the two brand groups is 0.199 (standard genetic distance) and 0.132 (DA distance). Genetic distances of the two groups were relatively close to each other. Each individual is ramified to two brand groups in phylogenetic dendrogram.

The growth stage study on the femur and tibia of Korean native chicken after hatching (한국 재래닭의 부화 후 성장단계별 넙다리뼈와 정강뼈 성장에 관한 연구)

  • Tae, Hyun-Jin
    • Korean Journal of Veterinary Service
    • /
    • v.38 no.3
    • /
    • pp.181-188
    • /
    • 2015
  • Skeletal development of chicken has been widely discussed in industrial forums and various research reports. However, these studies were emphasis on the commercial chicken strains for improve egg and meat production whereas the skeletal quiet remains as a potential weak link related to facilitating in the physical support of heavier carcasses at ever younger ages. For that, the study of standardization of skeletal development is important but it was rarely reported in Korean native chicken (KNC). The study was investigated the skeletal characteristics of KNC for international standardization. We studied in KNC at 2, 14, 28, 42, 56, 70, 84, 98, 112, 126, 147, 168, 196, 224, 336 and 448 days after hatch (male and female, n=13 for each group). We measured the body weight (BW), and after sacrifice measured organs and remove muscle from femur & tibia and measured bone weight. Data were analyzed by ANOVA, Duncan test, correlation analysis and regression analysis of SAS 9.1. We analyzed the data of BW, femur & tibia and made growth curve also. The BW was significantly increased up to 147 days after hatch (male, $1,927.88{\pm}68.92g$; female, $1,456.00{\pm}50.11g$), and then increased gradually. At 336 days, these growth was stop (male, $2,467.00{\pm}42.84g$; female, $1,568.71{\pm}62.62g$). The growth of femur & tibia length and width was stop on 98~126 days after hatch. At 98 days, we measured the length and width of femur & tibia in male were $132.39{\pm}3.18mm$ & $25.98{\pm}0.59mm$ whereas in female at 112 days the length of femur & tibia was $116.40{\pm}1.55mm$ and at 126 days width was $21.41{\pm}0.38mm$. Our study suggests that the growth of male KNC was classified pre-puberty (0~98 days), puberty (98~336 days) and maturity (after 336 days), meanwhile female was shown similar trend however puberty period of KNC was 112 or 126 days after hatch.

Effect of Interrelationship between Blood Melatoni or Estrogen and Light Cycle on Performance of Korean Native Chicken (혈중 멜라토닌 혹은 에스트로겐과 광주기의 상호작용이 재래닭의 생산성에 미치는 영향)

  • 류경선;강창원
    • Korean Journal of Poultry Science
    • /
    • v.24 no.2
    • /
    • pp.85-90
    • /
    • 1997
  • An experiment was conducted to investigate the relationship between blood hormone levels and light cycle on performance of Korean native chicken. One hundred and two Korean native chickens were grouped into three treatments of natural light cycle (Control), 13L:11D (T2), and 16L:8D (T3). The egg production, egg weight, feed intake, serum melatonin and estrogen level were periodically measured from 22 to 34 weeks, respectively. The laying rates of T2 and T3 were significantly higher than that of the Control (P

  • PDF

축산농가와 출품업체를 위한 비즈니스 박람회, 8월 31일 대전무역전시관에서 개최

  • 대한양계협회
    • KOREAN POULTRY JOURNAL
    • /
    • v.37 no.8 s.430
    • /
    • pp.65-70
    • /
    • 2005
  • 제4회 2005년 한국국제축산박람회가 오는 8월 31일부터 9월 2일까지 KOTRA 대전무역전시관(KOTREX), 엑스포과학공원에서 '깨끗한 환경과 안전한 축산물'이라는 주제로 열린다. 본 박람회 주최는 대한양돈협회, 대한양계협회, 한국낙농육우협회, 전국한우협회, 한국축산환경시설기계협회가 되고, 대한양돈협회, 2005한국국제축산박람회추진위원회, KOTREX가 공동 주관한다. 행사 후원은 농림부, 농협중앙회, 한국사료협회, 대전광역시, 충청남도가 맡았다. 이번 박람회는 출품하는 전시업체와 참관객인 축산농가를 위한 박람회로 꾸미기 위해 우선 장소를 대전 무역전시관(KOTREX)으로 옮겨 축산농가들이 쉽게 찾아올 수 있도록 했으며, 전시부스 내에서 실제적인 상담과 거래가 활성화 될 수 있도록 시식행사 등 부대행사는 옥외에서 치러질 수 있도록 하였다. 2005 한국국제축산박람회는 체험박람회, 참여박람회, 비즈니스박람회라는 목표하에 전시면적 15,250제곱미터에 15개국 178여개업체가 600부스 규모로 열리게 된다. 출품대상품목은 축산기자재 및 시설, 배합사료, 동물약품, 생명공학 제품, 축산물 위생 및 가공시설, 축산물 및 가공식품, 가축분뇨 자원화 처리시설, 종축, 리모델링 관련 설비 및 기술, 컨설팅 관련 정보 및 기술 등이 있다. 부대행사로는 축산물 시식회, 축산관련 학술 세미나, 우수전시업체 선발 및 시상, 전국대학생 포스터 경진대회 및 시상, 종축 전시와 경매, 재래닭 및 특수가금 전시, 애완견 및 명견전시, 돼지달리기 및 사진찍기 등이 개최된다. 박람회 참관객은 외국인 바이어 1,000명을 포함하여 10만명에 이를 것으로 추정하고 있다. 학술행사는 박람회 기간 동안 엑스포과학기념관과 대전전시관 세미나실에서 양계세미나, 축산기자재세미나, 축산기술세미나, 양돈포럼, 낙농세미나, 한우세미나, 양돈세미나가 열리게 된다.

  • PDF