• 제목/요약/키워드: single-nucleotide polymorphisms

검색결과 755건 처리시간 0.024초

Whole-genome association and genome partitioning revealed variants and explained heritability for total number of teats in a Yorkshire pig population

  • Uzzaman, Md. Rasel;Park, Jong-Eun;Lee, Kyung-Tai;Cho, Eun-Seok;Choi, Bong-Hwan;Kim, Tae-Hun
    • Asian-Australasian Journal of Animal Sciences
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    • 제31권4호
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    • pp.473-479
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    • 2018
  • Objective: The study was designed to perform a genome-wide association (GWA) and partitioning of genome using Illumina's PorcineSNP60 Beadchip in order to identify variants and determine the explained heritability for the total number of teats in Yorkshire pig. Methods: After screening with the following criteria: minor allele frequency, $MAF{\leq}0.01$; Hardy-Weinberg equilibrium, $HWE{\leq}0.000001$, a pair-wise genomic relationship matrix was produced using 42,953 single nucleotide polymorphisms (SNPs). A genome-wide mixed linear model-based association analysis (MLMA) was conducted. And for estimating the explained heritability with genome- or chromosome-wide SNPs the genetic relatedness estimation through maximum likelihood approach was used in our study. Results: The MLMA analysis and false discovery rate p-values identified three significant SNPs on two different chromosomes (rs81476910 and rs81405825 on SSC8; rs81332615 on SSC13) for total number of teats. Besides, we estimated that 30% of variance could be explained by all of the common SNPs on the autosomal chromosomes for the trait. The maximum amount of heritability obtained by partitioning the genome were $0.22{\pm}0.05$, $0.16{\pm}0.05$, $0.10{\pm}0.03$ and $0.08{\pm}0.03$ on SSC7, SSC13, SSC1, and SSC8, respectively. Of them, SSC7 explained the amount of estimated heritability along with a SNP (rs80805264) identified by genome-wide association studies at the empirical p value significance level of 2.35E-05 in our study. Interestingly, rs80805264 was found in a nearby quantitative trait loci (QTL) on SSC7 for the teat number trait as identified in a recent study. Moreover, all other significant SNPs were found within and/or close to some QTLs related to ovary weight, total number of born alive and age at puberty in pigs. Conclusion: The SNPs we identified unquestionably represent some of the important QTL regions as well as genes of interest in the genome for various physiological functions responsible for reproduction in pigs.

한우 Exostosin-1 유전자의 SNP 탐색 및 경제형질 관련성 분석 (Association Study Between the Polymorphisms of Exostosin-1 Gene and Economic Traits in Hanwoo)

  • 김범수;김남국;이승환;조용민;허강녕;박응우;양부근;윤두학
    • Journal of Animal Science and Technology
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    • 제53권1호
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    • pp.7-13
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    • 2011
  • 본 연구는 한우의 경제형질 관련 유전적 표지인자(DNA marker) 개발을 목적으로 EXT1 유전자의 다형성과 발현양상을 관찰하여 경제형질과의 관련성을 확인하고자 수행하였다. PCRdirect sequencing을 통하여 4개(T272196A, C272359T, G290964A 및 A302092G)의 SNPs를 탐색 하였으며, 탐색된 SNPs를 통하여 PCR-RFLP 기법으로 유전자형을 결정한 후 경제형질과 관련성을 분석하였다. 그 결과 T272196A 좌위에서 근내지방 육종가(p=0.014), G290964A 좌위에서 등지방두께 육종가 추정치(p=0.001), A302092G 좌위에서는 등지방두께 육종가(p < 0.001) 및 등심단면적 육종가(p=0.020)에서 각각 유의적인 연관성이 인정되었다. 따라서, 본 연구를 통해 확인된 SNP를 이용하여 한우의 선발에 활용 가능할 것으로 사료된다.

한우 CLMN 유전자 exon 8번 영역의 신규 단일염기다형과 근내지방도의 연관성에 관한 연구 (A Novel SNP in the Exon 8 Region of the CLMN Gene and Its Association with Marbling Score in Hanwoo)

  • 신성철;정의룡
    • 생명과학회지
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    • 제29권12호
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    • pp.1314-1320
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    • 2019
  • 본 연구는 한우 CLMN 유전자 exon 8번 영역의 단일염기다형과 육량 및 육질형질과의 연관성을 평가하기 위해 수행하였다. 또한, 한우 등심조직에서 근육 내 지방함량의 극명한 차이를 나타내는 고지방육 그룹과 저지방육 그룹 간 CLMN 유전자의 발현양상을 비교 분석하였다. 그 결과 CLMN 유전자는 고지방육 그룹에서 더 높게 발현되었다. 한우 CLMN 유전자의 exon 8번 영역에서 총 9개의 단일염기다형을 검출하였으며, 이들 SNP의 유전자형과 육량 및 육질형질과의 연관성을 평가하기 위해 direct-sequencing 분석을 통하여 각 개체별 SNP genotyping을 수행하였다. 그 결과, exon 8번 영역 내에 존재하는 g.23249G>C SNP가 근내지방도 형질과 유의적인 연관성이 있는 것으로 분석되었다 즉, CC 및 GC 유전자형을 가진 개체들은 GG 유전자형을 가진 개체들에 비해 유의적으로 더 높은 근내지방도를 갖는 것으로 분석되었다. 연관불평형 분석을 통해 CLMN 유전자의 haplotype을 구성하고 육량 및 육질형질과의 연관성을 분석한 결과 근내지방도와 유의적 연관성이 입증되었다. 즉, CC-CC haplotype(g.23249G>C and g.23465T>C SNPs)을 가진 개체들이 CT 및 GT haplotype을 갖는 개체들에 비해 유의적으로 더 높은 근내지방도를 갖는 것을 확인하였다. 따라서 본 연구에서 발굴된 CLMN 유전자의 SNP는 육량과 육질형질이 우수한 한우를 선발하기 위한 분자 마커로 활용 가능할 것으로 사료된다.

Whole-Genome Resequencing Analysis of Hanwoo and Yanbian Cattle to Identify Genome-Wide SNPs and Signatures of Selection

  • Choi, Jung-Woo;Choi, Bong-Hwan;Lee, Seung-Hwan;Lee, Seung-Soo;Kim, Hyeong-Cheol;Yu, Dayeong;Chung, Won-Hyong;Lee, Kyung-Tai;Chai, Han-Ha;Cho, Yong-Min;Lim, Dajeong
    • Molecules and Cells
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    • 제38권5호
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    • pp.466-473
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    • 2015
  • Over the last 30 years, Hanwoo has been selectively bred to improve economically important traits. Hanwoo is currently the representative Korean native beef cattle breed, and it is believed that it shared an ancestor with a Chinese breed, Yanbian cattle, until the last century. However, these two breeds have experienced different selection pressures during recent decades. Here, we whole-genome sequenced 10 animals each of Hanwoo and Yanbian cattle (20 total) using the Illumina HiSeq 2000 sequencer. A total of approximately 3.12 and 3.07 billion sequence reads were mapped to the bovine reference sequence assembly (UMD 3.1) at an average of approximately 10.71- and 10.53-fold coverage for Hanwoo and Yanbian cattle, respectively. A total of 17,936,399 single nucleotide polymorphisms (SNPs) were yielded, of which 22.3% were found to be novel. By annotating the SNPs, we further retrieved numerous nonsynonymous SNPs that may be associated with traits of interest in cattle. Furthermore, we performed whole-genome screening to detect signatures of selection throughout the genome. We located several promising selective sweeps that are potentially responsible for economically important traits in cattle; the PPP1R12A gene is an example of a gene that potentially affects intramuscular fat content. These discoveries provide valuable genomic information regarding potential genomic markers that could predict traits of interest for breeding programs of these cattle breeds.

Variants of Inflammnation-related Genes and the Risk of Gallstones and Biliary Tract Cancer: A population-baged Study in China

  • Hsing, Ann W.;Sakoda, Lori;Chen, Jin-Bo;Rashid, Asif;Wang, Bin-Shen;Shen, Ming-Chang;Chen, Eric;Rosenberg, Phillip;Zhang, Mingdong;Andreotti, Gabriella;Welch, Robert;Yeager, Meredith;Fraumeni Jr. Joseph F.;Gao, Yu-Tang;Stephen J. Chanock
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2006년도 추계학술대회
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    • pp.32-33
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    • 2006
  • There is compelling evidence that chronic inflammation predisposes to biliary tract cancer. Previously we found that aspirin use and variants in the PTGS2 gene, both of which are closely linked to inflammation, were associated with biliary tract cancer risk in a population-based study in China. To test the inflammation hypothesis further, we examined the associations of variants in 20 genes involved in the inflammation pathway with risk of biliary tract cancer and stones in a large population-based case-control study in Shanghai, China. We genotyped 56 single nucleotide polymorphisms (SNPs)from 20 inflammation genes in 411 biliary tract cancer cases (237 gallbladder cancers, 127 extrahepatic bile duct cancers, and 47 ampullary cancers), 895 subjects with biliary stones, and 786 population controls. Unconditional logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (Cls) for the association of individual SNPs and haplotypes with biliary stones and biliary tract cancer risk. Of the 56 SNPs examined, 20 showed some associations with biliary cancer and stones. Specifically, variants of the IL8, IL8RB, RNASEL, TGF-beta, and TNF-alpha genes were associated with gallstone risk, while variants in the IL1A, IL10, VEGF, and RNASEL genes were associated with gallbladder cancer risk. Adjustment for multiple comparisons did not materially change these results. Of the 10 genes with multiple SNPs, we inferred halotypes; only one haplotype in the IL8RBgene was associated with gallstones. The haplotype frequency was significantly different between bile dict cancer cases and control (p=0.007). A haplotype comprising 3 SNPs in the IL8RB gene (rs2230054, rs1126579, rs1126580) was associated with a 54% increased risk of bile duct stones (95% CI 1.14-2.07, p=0.02), relative to the most frequent haplotype. In summary, common variants in immune-related genes influencing inflammatory responeses were associated with gallstones and biliary tract cancer, lending further support to the role of inflammation in the pathogenesis of biliary stones and biliary tract cancer. Future larger studies with more complete gene coverage are needed to confirm these results.

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Integrative Study on PPARGC1A: Hypothalamic Expression of Ppargc1a in ob/ob Mice and Association between PPARGC1A and Obesity in Korean Population

  • Hong, Mee-Suk;Kim, Hye-Kyung;Shin, Dong-Hoon;Song, Dae-Kyu;Ban, Ju Yeon;Kim, Bum Shik;Chung, Joo-Ho
    • Molecular & Cellular Toxicology
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    • 제4권4호
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    • pp.318-322
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    • 2008
  • Obesity is an increasing worldwide health problem that is strongly related to the imbalance of food intake and energy metabolism. It was well-known that several substances in the hypothalamus regulate food intake and energy metabolism. We planned an integrative study to elucidate the mechanism of the development of obesity. Firstly, to find candidate genes with the marvelous effect, the different expression in the hypothalamus between ob/ob and 48-h fasting mice was investigated by using DNA microarray technology. As a result, we found 3 genes [peroxisome proliferator activated receptor, gamma, coactivator 1 alpha (Ppargc1a), calmodulin 1 (Calm1), and complexin 2 (Cplx2)] showing the different hypothalamic expression between ob/ob and 48-h fasting mice. Secondly, a genetic approach on PPARGC1A gene was performed, because PPARGC1A acts as a transcriptional coactivator and a metabolic regulator. Two hundred forty three obese female patients with body mass index (BMI)${\geq}$25 and 285 control female subjects with BMI 18 to<23 were recruited according to the Classification of Korean Society for the Study of Obesity. Among the coding single nucleotide polymorphisms (cSNPs) of PPARGC1A, 2 missense SNPs (rs8192678, Gly482Ser; rs3736265, Thr612Met) and 1 synonymous SNP (rs3755863, Thr528Thr) were selected, and analyzed by PCR-RFLP and pyrosequencing. For the analysis of genetic data, chi-square ($X^2$) test and EH program were used. The rs8192678 was significantly associated with obese women (P<0.0006; odds ratio, 1.5327; 95% confidence interval, 1.2006-1.9568). Haplotypes also showed significant association with obese women ($X^2$=33.28, P<0.0008). These results suggest that PPARGC1A might be related to the development of obesity.

한국 재래닭에서 지질대사 관련 유전자에 존재하는 유해성 nsSNP 발굴 및 생물학적 기능 예측 (Discovery of Deleterious nsSNPs on the Genes related to the Lipid Metabolism and Prediction of Changes on Biological Function in Korean Native Chicken)

  • 오재돈;신동현;신상수;윤창;송기덕
    • 한국가금학회지
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    • 제43권4호
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    • pp.263-272
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    • 2016
  • 한국 재래닭은 맛이나 기호성에서 한국 소비자들의 입맛에 적합한 것으로 알려져 있는데, 이러한 한국 재래닭의 특성을 결정짓는 유전적 요소들이 어떤 것들이 있는지 많이 밝혀지지 않았다. 본 연구에서는, 맛을 결정하는 요인 중 하나인 지질의 대사와 관련된 유전자들 내에 존재하는 nsSNP 연구를 통해서, 한국 재래닭의 유전적 특성을 설명하기 위한 자료를 확보하고자 분석을 실시하였다. 지질대사와 관련한 81개 유전자에 대하여 한국 재래닭에 공통으로 존재하는 nsSNP를 139개 동정하였으며, 이 중 9개의 유전자에 존재하는 14개의 nsSNP가 유해성 nsSNP로 확인되었다. 이들 9개 유전자에 대해 단백질 도메인 예측을 실시하였으며, 그 결과, 유해성 nsSNP들에 의해 바뀐 아미노산들이 모두 주요도메인의 외부에 존재함을 알 수 있었다. 이는 한국 재래닭에서 공통으로 발견한 nsSNP들이 유전자의 고유 기능에 큰 영향을 미치기 보다는 다소 미미한 변화를 통해 한국 재래닭 고유의 특성을 형성하는데 더 큰 역할을 한 것으로 사료된다. 이러한 부분들은 차후 실험을 통해 밝혀져야 할 부분이며, 한국 재래닭의 맛과 관련된 형질 개량을 위한 분자육종 기술 개발에 주요한 자료로 활용될 수 있을 것으로 기대되어진다.

PCR-DHPLC를 이용한 한국인 제2형 당뇨환자의 GCK와 HNF-1α의 유전자다형성 분석 (Analysis of the GCK and HNF-1α Gene Polymorphism in Korean Type 2 Diabetic Patients by PCR-DHPLC)

  • 남윤형;박대용;박상범;안영창;이상현;조민호;박수민;장원철
    • 대한화학회지
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    • 제51권6호
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    • pp.543-548
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    • 2007
  • MODY는 일반적으로 제 2 형 당뇨의 특수형으로 25세 이전에 발병하며 상염색체 우성으로 유전되 며 인슐린 분비장애를 특징으로 한다. GCK와 HNF-1α의 유전자 돌연변이는 제 2 형 당뇨에서 가장 큰 원인 중에 하나이다. 따라서 이들 유전자다형성의 연관성을 다양한 분석 방법으로 연구할 필요성이 대두되고 있다. GCK와 HNF-1α 유전자의 exon과 exon에 근접한 intron을 실험하였고, 또한 promotor까지 PCR-DHPLC (Polymerase Chain Reaction - Denaturing High Performance Liquid Chromatography) 방법과 direct sequencing 방 법을 사용하였다. 시료는 11명의 환자와 20명의 정상인에서 DNA를 추출하였고 GCK와 HNF-1α의 단일 염기 다형성을 PCR-DHPLC 방법으로 확인하였다. 결과적으로 GCK 유전자에서는 1개(R135G)를 검출하였고 HNF-1α 유전자에서는 2개(I27L, S487N)를 검출하였으며 intron 8에서도 돌연변이를 검출할 수 있었다.

재래흑염소와 교잡종 염소의 Monomorphic SNP 분석을 통한 유전적 다양성과 집단구조의 비교 및 검증 (Comparison and Validation of Genetic Diversity and Population Structure Using Monomorphic SNP Data of the Korean Native Black Goat and Crossbred Goat)

  • 김관우;이진욱;이은도;이성수;최유림;임현태;김유삼;이상훈
    • 생명과학회지
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    • 제30권11호
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    • pp.1007-1011
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    • 2020
  • 본 연구는 우리나라 고유의 재래흑염소 집단인 당진, 장수, 통영 및 경상대 계통과 교잡종 염소 계통 또는 해외품종의 개체 식별을 위한 유전적 다양성과 관계 조사 및 검증을 위해 수행하였다. 각 염소 집단에 존재하는 Monomorphic SNP를 수집한 이후 공통적으로 존재하는 SNP 133개를 선발하여 분석에 이용하였다. Monomorphic SNP 133개를 통한 재래흑염소와 교잡종 염소의 유전적 구조 차이를 나타냈으며, 주성분 분석 결과 재래흑염소와 교잡종 염소가 명확히 구분되는 것으로 나타났다. 또한, 참조집단 이외의 70두(Native Korean goat = 24, Cross breed = 46)로 구성된 검증집단을 분석한 결과 국내 재래흑염소 계통의 참조집단과 동일한 유전적 구조를 나타냈으며, 교잡종 염소의 경우 참조집단의 일부 유전적 구성을 공유하는 것으로 나타났다. 국내 재래흑염소의 경우는 하나의 군집을 형성한 반면 해외 품종 및 교잡종 계통의 경우 재래흑염소 계통에 비해 넓게 퍼져 군집을 형성하는 것으로 나타났다. 따라서, 본 연구 결과는 국내 재래흑염소 유전자원 집단을 보존을 위한 기초자료로 활용하고 추후 유전적 다양성을 고려한 염소의 개량을 위한 기초자료로 유용하게 활용 할 수 있을 것으로 판단된다.

PCR-RFLP for the Identification of Mammalian Livestock Animal Species

  • Han, Sang-Hyun;Park, Seon-Mi;Oh, Hong-Shik;Kang, Geunho;Park, Beom-Young;Ko, Moon-Suck;Cho, Sang-Rae;Kang, Yong-Jun;Kim, Sang-Geum;Cho, In-Cheol
    • 한국수정란이식학회지
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    • 제28권4호
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    • pp.355-360
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    • 2013
  • Precise, rapid and simple methods for species identification in animals are among the most important techniques in the livestock industry and research fields including meat classification. In this study, polymerase chain reaction (PCR) based molecular identification using inter species polymorphisms were examined by PCR-restriction fragment length polymorphism (RFLP) analysis for mitochondrial DNA (mtDNA) cytochrome b (CYTB) gene sequences among four mammalian livestock animals (cattle, horse, goat and pig). The results from PCR-RFLP analysis using the AluI restriction enzyme were also provided for the species-specific band patterns among CYTB gene sequences in these four species. The AluI-digestion for CYTB genes provided interesting migration patterns differentially displayed according to each species. Cattle and horse had one AluI-recognition site at different nucleotide positions and their AluI-digested fragments showed different band patterns on the gels. Pig had two AluI-recognition sites within the amplified CYTB sequences and produced three bands on the gels. Goat had no AluI-recognition site and was located at the same position as the uncut PCR product. The results showed the species-specific band patterns on a single gel among the four livestock animal species by AluI-RFLP. In addition, the results from blind tests for the meat samples collected from providers without any records showed the identical information on the species recorded by observing their phenotypes before slaughter. The application of this PCR-RFLP method can be useful and provide rapid, simple, and clear information regarding species identification for various tissue samples originating from tested livestock species.