• 한국가금학회지
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• 제36권4호
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• pp.317-322
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• 2009

닭의 MHC 유전자 내에 있는 microsatellite marker LEI0258은 혈청의 구분 및 질병 저항성 유전자로 많은 연구가 되어 있다. 본 연구는 유전변이가 있는 microsatellite marker LEI 0258을 한국 재래계 흑색종, 한국 재래계 갈색종, 코니쉬종, 로드아일랜드 레드종에 적용하여 품종 특이 유전자형 및 allele을 탐색하고, 품종 구분 활용에 가능하지 여부를 실험하기 위하여 실시하였다. 한국 재래계만이 가지고 있는 특이 대립 유전자는 찾을 수는 없었지만 품종간 유전자형의 빈도 차이를 보이는 대립 유전자들을 확인할 수 있어 마커의 조합을 통하여 품종을 구분할 수 있는 가능성을 제시하였으며, 질병 저항성 연구의 기초 자료로 그 이용성이 높을 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권12호
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• pp.1637-1643
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• 2011

Korean native chickens are a very valuable chicken population in Korea and their prices are higher than that of commercial broilers. In order to discriminate two commercial Korean native chicken populations (CCP1 and CCP2), single nucleotide polymorphisms (SNPs) from mitochondrial (mt) DNA D-loop sequences and LEI0258 marker polymorphisms in the major histocompatibility complex (MHC) region were investigated. A total of 718 birds from nine populations were sampled and 432 mtDNA sequences were obtained. Of these, two commercial Korean native chicken populations (363 birds) were used for investigation of their genetic relationship and breed differentiation. The sequence data classified the chickens into 20 clades, with the largest number of birds represented in clade 1. Analysis of the clade distribution indicated the genetic diversity and relation among the populations. Based on the mtDNA sequence analysis, three selected SNPs from mtDNA polymorphisms were used for the breed identification. The combination of identification probability (Pi) between CCP1 and CCP2 using SNPs from mtDNA and LEI0258 marker polymorphisms was 86.9% and 86.1%, respectively, indicating the utility of these markers for breed identification. The results will be applicable in designing breeding and conservation strategies for the Korean native chicken populations and also used for the development of breed identification markers.

• Asian-Australasian Journal of Animal Sciences
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• 제22권10호
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• pp.1359-1365
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• 2009

We performed a genome-wide linkage and quantitative trait locus (QTL) analysis to confirm the existence of QTL affecting Rous Sarcoma Virus (RSV) induced tumor regression, and to estimate their effects on phenotypic variance in an F2 resource population. The F2 population comprised 158 chickens obtained by crossing tumor regressive White Leghorn (WL) and tumor progressive Rhode Island Red (RIR) lines was measured for tumor formation after RSV inoculation. Forty-three tumor progressive and 28 tumor regressive chickens were then used for genome-wide linkage and QTL analysis using a total of 186 microsatellite markers. Microsatellite markers were mapped on 20 autosomal chromosomes. A significant QTL was detected with marker LEI0258 located within the MHC B region on chromosome 16. This QTL had the highest F ratio (9.8) and accounted for 20.1% of the phenotypic variation. Suggestive QTL were also detected on chromosomes 4, 7 and 10. The QTL on chromosome 4 were detected at the 1% chromosome-wide level explaining 17.5% of the phenotypic variation, and the QTLs on chromosome 7 and 10 were detected at the 5% chromosome-wide level and explained 11.1% and 10.5% of the phenotypic variation, respectively. These results indicate that the QTLs in the non-MHC regions play a significant role in RSV-induced tumor regression. The present study constitutes one of the first preliminary reports in domestic chickens for QTLs affecting RSV-induced tumor regression outside the MHC region.