共查询到19条相似文献，搜索用时 234 毫秒
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通过研究促生长激素分泌素受体（growth hormone secretagogue receptor,GHSR）基因多态性,为贵州半细毛羊选种选育提供进一步的分子生物学依据。试验选取36只贵州半细毛羊构建DNA池,设计1对引物扩增其GHSR基因第2外显子及第1、2内含子部分序列并进行双向测序,对SNPs位点等位基因频率进行估算,利用在线生物信息学软件分析SNPs位点对GHSR基因RNA二级结构的影响。结果发现,在贵州半细毛羊GHSR基因中筛选到2个SNPs：T70G和G229A,均为同义突变,SNPs位点导致GHSR基因mRNA二级结构发生变化。GHSR基因多态性可能影响贵州半细毛羊的生长。 相似文献
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以高脚鸡、威宁鸡、乌蒙乌骨鸡(含白壳蛋鸡和绿壳蛋鸡)3个贵州地方鸡种为研究对象,构建品种DNA池,扩增NKX2-5基因第1外显子全部序列及第2内含子部分序列,采用直接测序法对3个品种(4个群体)的NKX2-5基因进行单核苷酸多态性检测,利用生物信息学软件预测不同多态性位点对NKX2-5基因mRNA二级结构、蛋白质二级结构的影响.结果表明,在3个品种(4个群体)中共检测到G108A、T288C、C400T、T420G和G429A 5个SNPs位点,其中,G108A位于非编码区;T288C、C400T位于第1外显子区;T420G和G429A位于内含子区.T288C和C400T均为错义突变,T288C突变导致丝氨酸(Ser)变为脯氨酸(Pro)、C400T突变导致丙氨酸(Ala)变为缬氨酸(Val),SNPs位点对于NKX2-5基因mRNA二级结构、蛋白质二级结构有一定影响. 相似文献
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为探究黄牛生长激素受体（GHR）基因多态性，筛选出对贵州地方黄牛生长性状有显著影响的SNPs位点，本研究以150头贵州地方黄牛（关岭牛、思南牛、威宁牛各50头）为研究对象，以GHR为候选基因，根据GenBank收录的黄牛GHR基因外显子序列设计引物，提取贵州地方黄牛血液基因组DNA并构建混池；通过PCR扩增测序法验证GHR基因SNPs和分型，运用DNAStar、SPSS 19.0软件对GHR基因SNPs进行遗传学分析，并与贵州地方黄牛生长性状进行关联性分析，寻找各位点不同基因型间贵州地方黄牛生长性能差异，同时使用生物信息学分析GHR突变前后mRNA二级结构的变化，预测分析贵州地方黄牛GHR蛋白的结构与功能。结果显示，贵州地方黄牛GHR基因共检测出8个SNPs，分别为Exon9-C162T、Exon9-C201T、Exon9-G243C、Exon9-G383A、Exon9-A495T、Exon9-C622T、Exon9-C642T和Exon9-A650C，其中思南牛无Exon9-G243C。遗传学分析表明，除Exon9-G243C位点在威宁牛中偏离Hardy-Weinberg平衡外，其余SNPs均未偏离Hardy-Weinberg平衡。相关性分析发现，GHR基因突变位点在关岭牛和思南牛中均未检测到显著性差异，但在威宁牛中，Exon9-G243C基因型GC个体胸围显著低于GG和CC基因型（P<0.05），Exon9-A650C基因型AA个体的体斜长、坐骨端宽均显著高于CC基因型（P<0.05），而胸深显著低于AC和CC基因型（P<0.05），其余6个SNPs差异均不显著（P>0.05）。生物信息学分析发现突变前后，除Exon9-G383A mRNA二级结构未发生改变外，其余SNPs mRNA二级结构均发生了改变，Exon9-G243C、Exon9-A650C会影响蛋白质二级结构的变化，但突变不影响蛋白质三级结构的变化。此外，贵州地方黄牛GHR蛋白是一种分泌蛋白，具有信号肽剪切位点且具有6个N-糖基化位点，证实该基因变异程度高。本研究提示GHR基因Exon9-G243C、Exon9-A650C这2个SNPs对贵州地方黄牛生长性状具有显著影响，可作为贵州地方黄牛生长发育的候选分子标记。 相似文献
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旨在研究NR6A1、VSX2、VRTN、LTBP2基因在北京黑猪群体中基因的多态性与脊椎数和胴体性状(胴体长、胴体直长、胴体斜长及胴体重)的关联。本研究提取410头(210±7)日龄健康北京黑猪耳组织DNA,通过PCR技术和Sanger测序技术对4个基因外显子区进行基因分型,计算变异位点基因型频率以及等位基因频率的分布,并与脊椎数和胴体性状进行关联分析。结果表明,在VSX2、VRTN、LTBP2三个基因中共筛选到15个SNPs,其中包含1个CDS区的同义突变和14个3'UTR突变。使用Duncan's多重检验统计分析发现,VSX2基因中CDS区的1个突变c.536 G＞A与脊椎数关联显著(P＜0.05)。VRTN中3'UTR区共4个突变与性状关联显著(P＜0.05),其中c.2598 A＞G和c.2607 G＞T与脊椎数、胴体长、胴体直长及胴体斜长关联显著,c.3087 G＞C只与胴体斜长关联显著,c.3094 A＞G与脊椎数及胴体斜长关联显著(P＜0.05)。LTBP2上6个3'UTR突变位点(c.7158 A＞G、c.6869 C＞T、c.6319 G＞C、c.6246 G＞T、c.6170 A＞G、c.6079 G＞T)与脊椎数关联显著(P＜0.05),但与胴体性状关联不显著。综上所述,VSX2、VRTN、LTBP2基因中共有10个SNPs与脊椎数性状关联显著(P＜0.05),仅VRTN基因中4个SNPs与胴体性状关联显著(P＜0.05)。这些关联显著的SNPs可以作为北京黑猪脊椎数及胴体性状变异的候选基因功能位点。 相似文献
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为了解兔肉质性状特征,给兔的品种选种选育提供理论依据。本试验选取新西兰兔和加利福尼亚兔分别构建各自的DNA池,对解偶联蛋白1(uncouplingprotein 1,UCP1)基因的第2外显子及第1内含子部分序列进行扩增,扩增产物进行双向测序,利用BLAST和DNAStar分析并确定其SNP。结果分析,在新西兰兔中发现6个SNPs:T135C、C232T、T332C、C360T、T550C和A560G,其中T135C和C232T为同义突变,T332C、C360T、T550C、A560G 4个突变位点位于内含子区。利用RNA在线预测软件预测UCP1基因RNA二级结构最小自由能由-917.51 kJ/mol变为-866.10 kJ/mol,说明SNPs对UCP1基因的RNA二级结构产生影响。 相似文献
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《中国畜牧杂志》2016,(9)
研究了贵州黑山羊MHC-DQB2基因的多态性,以便发挥MHC-DQB2基因在山羊抗病育种中的作用。采用构建DNA池并通过PCR直接测序的方法对164只贵州黑山羊的DQB2基因Exon1进行遗传变异分析;应用生物信息学软件分析基因频率、RNA二级结构、蛋白质二级结构和抗原表位。在其第1外显子中筛选得到4个SNPs,分别为G23A(Arg→Gln)、G45A(同义突变)、T90C(同义突变)、C109A(Gln→Lys),其中,T90C突变位点的最小自由能最低,其RNA二级结构最稳定。G23A和C109A 2个突变位点均引起RNA二级结构、蛋白质二级结构和抗原表位的改变。结果表明:贵州黑山羊MHC-DQB2基因的第1外显子具有较丰富的遗传多样性。 相似文献
7.
为了解兴义鸭肌肉生长抑制素(myostatin,MSTN)基因SNPs与屠宰性状的相关性,本研究采用基因克隆及PCR产物直接测序的方法,将MSTN基因作为鸭屠宰性状的候选基因,对兴义鸭的MSTN基因外显子进行多态性检测.结果表明,在60个兴义鸭个体中筛选出8个SNPs,其中,第1外显子有5个突变位点:SNP1(G77A)、SNP2(A91G)、SNP3(G130A)、SNP4(C325T)和SNP5(C331T);在第2外显子中并未发现突变位点;第3外显子有3个突变位点:SNP6(C206T)、SNP7(A235G)和SNP8(C256A);对这8个SNPs与屠宰性状进行关联性分析,结果并未达到显著水平(P>0.05).本研究结果可丰富MSTN基因的研究数据,为鸭的育种提供参考. 相似文献
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为探究骨形态发生蛋白受体ⅠB（bone morphogenetic protein receptor ⅠB，BMPR-ⅠB）基因启动子区多态性及其与繁殖性状的相关性，本试验以贵州3个地方山羊品种（黔北麻羊、贵州黑山羊及贵州白山羊）为研究对象，通过构建混合DNA池PCR产物直接测序技术筛选SNPs位点，并采用多种生物信息学软件预测SNPs位点对核心启动子区、CpG岛和转录因子结合位点的影响。结果显示，BMPR-ⅠB基因启动子区存在4个SNPs位点：g.29893005 T > C、g.29893016 C > T、g.29893729 C > G和g.29894370 C > T。生物信息学软件预测得到BMPR-ⅠB基因核心启动子区和CpG岛，SNPs位点导致转录因子结合位点发生改变，g.29893005 T > C和g.29893016 C > T突变使原来的转录因子结合位点Sp1消失；g.29893729 C > G突变使原来转录因子结合位点AP-1消失，从而产生新的转录因子结合位点USF；g.29894370 C > T突变产生新的转录因子结合位点C/EBPalp，使原来的转录因子结合位点Sp1改变为C/EBPalp和Sp1。由此推测，SNPs位点对调控启动子功能元件可能存在重要影响。 相似文献
10.
为探究寡腺苷酸合成酶1（oligoadenylate synthase 1,OAS1）基因多态性与松辽黑猪繁殖性状的关联性,试验选取130头松辽黑猪母猪为研究对象,利用Sanger直接测序法测序查找OAS1基因外显子1~8的SNP位点,使用SPSS 19.0软件分析OAS1基因SNP位点与松辽黑猪繁殖性状的关联性。结果显示,在松辽黑猪OAS1基因外显子2、3和6上共检测到33个突变位点;其中在外显子2的110 bp处存在1个SNP位点（G110C）,存在3种基因型：GG、GC和CC;在外显子3的176 bp处存在1个SNP位点（C176T）,存在3种基因型：CC、CT和TT;在外显子6的145 bp处存在1个SNP位点（C145T）,存在3种基因型：CC、CA和AA;在166 bp处存在1个SNP位点（G166A）,存在3种基因型：GG、GA和AA;在206 bp处存在1个SNP位点（A206G）,存在3种基因型：AA、AG和GG。卡方适合性检验结果显示,松辽黑猪OAS1基因G110C突变位点符合Hardy-Weinberg平衡状态,C176T、C145A、G166A和G206A位点均偏离Hardy-Weinberg平衡状态。群体遗传参数分析结果显示,各SNPs位点遗传杂合度均位于中等水平,为中度多态（0.25<PIC<0.5）。关联分析结果发现,G110C位点GC基因型个体总产仔数、产活仔数和断奶仔猪数均显著高于GG基因型个体（P<0.05）;C176T位点CT基因型个体断奶仔猪数显著高于CC基因型个体（P<0.05）;C145T位点CC基因型个体总产仔数和产活仔数均显著高于AA基因型个体（P<0.05）;G166A位点GA基因型个体断奶仔猪数显著高于GG基因型个体（P<0.05）;A206G位点GG基因型个体总产仔数和产活仔数显著高于AA基因型个体（P<0.05）。结果表明,OAS1基因外显子区存在突变位点,对松辽黑猪部分繁殖性状有显著性影响。 相似文献
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本试验以贵州省3大地方山羊品种贵州白山羊、贵州黑山羊、黔北麻羊和2个省外地方品种关中奶山羊和内蒙古绒山羊为研究对象,采用DNA池结合PCR直接测序法对山羊前列腺素内过氧化物合酶2(prostaglandin-endoperoxide synthase 2,PTGS2)基因进行单核苷酸多态性检测。结果表明,在5个山羊品种中共检测到6个SNPs位点:A96G、C20T、A239G、T192C、T164A和G91C,其中,A96G和T164A分别位于外显子7和外显子8中,且均为同义突变,其余4个变异位点位于内含子中。生物信息学分析显示,外显子7和8中的2个SNPs位点均导致了mRNA二级结构的改变。 相似文献
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试验旨在研究白细胞表面抗原DRB1基因外显子3多态性与哈萨克羊布鲁氏菌病易感性的相关性。运用混合DNA池结合PCR产物直接测序方法,对哈萨克羊DRB1基因外显子3进行多态性分析,经卡方检验分析每个SNP位点的等位基因频率、基因型频率及其多态性与布鲁氏菌病易感性的相关性,利用生物信息学分析软件对PCR扩增所获序列进行RNA二级结构及蛋白质的二级结构和抗原表位分析。结果表明,在282 bp的外显子3序列中共检测到7个SNPs,分别为：T10C、C119T（Trp→Arg）、G215C（Gln→Glu）、A238G、T245G（Ser→Ala）、G256A、C259T,这些位点在病例组和对照组之间的等位基因频率及各基因型间不存在显著性差异（P > 0.05）;进一步分析发现,各突变位点均引起RNA二级结构和最小自由能的改变,各错义突变位点均未引起蛋白质二级结构和抗原表位的改变。由此得出,DRB1基因外显子3的7个SNPs位点（T10C、C119T、G215C、A238G、T245G、G256A和C259T）与哈萨克羊布鲁氏菌病易感性无相关性。 相似文献
13.
WANG Yuan-yuan YAN Guo LUO Cheng QI Jiang-jiao ZHOU Guang-pu TAN Jun GAO Jian-feng 《中国畜牧兽医》2017,44(12):3543-3553
This study was aimed to investigate the association between the polymorphism of DQB2 gene exon 2 and the susceptibility to Kazakh sheep brucellosis. The DQB2 gene exon 2 of Kazakh sheep lymphocyte antigen was amplified by PCR-SSCP method from 146 healthy and 28 infected with Brucella Kazakh sheep, and the single nucleotide polymorphisms (SNP) was analyzed, then the different alleles were selected for cloning and sequencing. In order to analyze its correlation with brucellosis susceptibility, the differences in gene frequency and genotype frequency of each SNP locus were analyzed by Chi-square test. Bioinformatics softwares were used to analyze the secondary structure of mRNA, the secondary structure, tertiary structure and epitope of protein. The sequencing result showed that 33 SNPs were detected in 270 bp DNA sequence, the gene frequencies of C9G and A180G were extremely significantly different in case group and control group (P<0.01), and its genotype frequencies presented significantly difference (P<0.05). Similarly, A13T and C133G loci were significant difference in case group and control group (P<0.05). Further analysis result showed that the minimum free energy of the A180G mutation site was the lowest and its mRNA secondary structure was the most stable; Both A13T and C133G mutation sites caused the changes of mRNA secondary structure, protein secondary, tertiary structure and antigenic epitope of protein, respectively. The results showed that the polymorphism of DQB2 gene exon 2 might be significantly correlated with brucellosis susceptibility in Kazakh sheep. 相似文献
14.
细毛羊KRT26基因多态性及其与羊毛细度的关联性分析 总被引：1，自引：0，他引：1
本研究旨在揭示影响绵羊重要经济性状的功能基因的分子遗传特征及其与细毛羊群体的遗传关系,为高效选育绵羊品种经济性状及其种质资源的保护与利用提供分子遗传学依据。试验利用PCR-SSCP、DNA测序和生物信息学对289个细毛羊的KRT26基因进行遗传变异分析及其与细毛羊羊毛细度的关联性分析。结果表明,KRT26基因在该细毛羊群体中存在AA、AB、BB 3种基因型,其基因型频率分别为0.221、0.426和0.353,A、B等位基因频率分别为0.434、0.566,细毛羊群体的多态信息含量为0.371,呈中度多态水平,且处于Hardy-Weinberg非平衡状态(P0.05)。经过BioEdit软件比对序列和Chromas软件分析测序结果显示,KRT26基因发现5处碱基突变:83bp(G/C)、86bp(T/C)、112bp(C/T)、140bp(G/A)和247bp(C/T),并通过氨基酸序列的比对结果表明,2处发生了氨基酸的替代,即Val/Ile和Asn/Lys。KRT26基因在细毛羊群体中AA基因型个体极显著高于AB和BB基因型(P0.01)。因此,KRT26基因可能作为羊毛细度性状的一个新的分子标记。 相似文献
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The prevalence and serotypic diversity of Mannheimia [Pasteurella] haemolytica and Pasteurella trehalosi from nasal swabs, sera and abattoir specimens from sheep in the highlands of Wollo, North East Ethiopia was investigated. Prevalence rates of 83% and 75% of these microorganisms were found in the serum samples and nasal swabs, respectively, from apparently healthy sheep. In a local abattoir, 205 lungs were investigated, 34% of which showed pneumonia, from which samples were collected from 51 lungs and the same number of corresponding tonsils. Mannheimia and Pasteurella species were isolated from 59% of these pneumonic lungs and 69% of the respective tonsils. M. haemolytica serotypes accounted for 41 (59%) and P. trehalosi for 11 (32%) of the isolates from the abattoir specimens. The majority (67%) of isolates from nasal swabs were P. trehalosi, M. haemolytica being isolated f rom 4 (13%) of the swabs. M. glucosida was isolated only from the tonsils. The predominant serotypes of the isolates from both the nasal swabs and the abattoir specimens were M. haemolytica A1 (17%) and P. trehalosi T4 (16%) and T3 (13%). P. trehalosi T15 was less commonly encountered, while M. haemolytica A9 and A13 were not isolated. Studies on sera from 100 sheep indicated that antibodies against M. haemolytica serotype A1 (14%) were most common, followed by A5 and A8 (each 10%) and A9 and P. trehalosi T3 (each 9%) and T4 (8%). Antibodies against M. glucosida or serotype A11 occurred in 2% of the sera. Multiple serotypes were common in all types of samples. The importance of including in vaccines the most prevalent serotypes involved in the pneumonia of sheep in the area is discussed. 相似文献
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试验旨在研究DQB2基因外显子2多态性与哈萨克羊布鲁氏菌病易感性的相关性。通过PCR-SSCP技术对146只布鲁氏菌阴性哈萨克羊血液样本和28只布鲁氏菌阳性哈萨克羊血液样本中的白细胞表面抗原DQB2基因外显子2的多态性进行研究,挑取不同的等位基因进行克隆测序,经卡方检验分析每个SNP位点的基因频率、基因型频率及其多态性与布鲁氏菌病易感性的相关性,应用生物信息学软件分析与哈萨克羊布鲁氏菌病易感性相关的不同等位基因的mRNA二级结构及蛋白质的二级结构、三级结构和抗原表位。结果发现,在270 bp的外显子2序列中共检测到33个SNPs,其中C9G、A180G位点的基因频率在病例组和对照组中的分布具有极显著性差异（P<0.01）,其基因型频率在病例组和对照组中存在显著差异（P<0.05）;A13T、C133G位点的基因频率在病例组和对照组中存在显著差异（P<0.05）;进一步分析发现,A180G突变位点的最小自由能最低,其mRNA二级结构最稳定;A13T和C133G 2个突变位点均引起mRNA二级结构及蛋白质二级结构、三级结构和抗原表位的改变。本试验结果表明DQB2基因外显子2多态性与哈萨克羊布鲁氏菌病易感性呈显著相关。 相似文献
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Mingxing CHU Haibin ZHUANG Yingjie ZHANG Mei JIN Xuewei LI Ran DI Guiling CAO Tao FENG Li FANG 《Animal Science Journal》2011,82(1):57-61
The inhibin βB (INHBB) gene was studied as a candidate gene for the prolificacy of Small Tail Han and Hu sheep. According to the sequence of exon 1 and 2 of bovine INHBB gene, six pairs of primers were designed to detect single nucleotide polymorphisms of exon 1 and 2 of INHBB gene in both high (Small Tail Han and Hu sheep) and low prolificacy breeds (Dorset, Texel and German Mutton Merino sheep) by polymerase chain reaction‐single strand conformation polymorphism (PCR‐SSCP). Three pairs of primers (primers 1‐1, 1‐2 and 1‐3) were used to amplify the exon 1, and others (primers 2‐1, 2‐2 and 2‐3) to the exon 2. Only the products amplified by primer 2‐3 displayed polymorphism. For primer 2‐3, three genotypes (AA, AB and BB) were detected in Hu sheep and only AA genotype in other breeds. In Hu sheep, frequency of AA, AB and BB genotypes was 0.636, 0.046 and 0.318, respectively. Sequencing revealed 276A > G mutation (based on the amplification region of primer 2‐3) which did not cause any amino acid change because it lay in the 3′ untranslated region. The ewes with genotype BB had 0.58 (P < 0.01) lambs more than those with AA in Hu sheep. 相似文献
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Sarcocystis tenella is a dog–sheep protozoan parasite, causing a widespread enzootic muscle parasitosis and neurological disease mainly in lambs. This parasite is pathogenic to sheep and important to the economical production of sheep. The present study was initially aimed to determine Toxoplasma gondii infection and the occurrence of co-infection with other Apicomplexa parasites in 602 Brazilian sheep. Twenty of these sheep were positive with antibodies to T. gondii by MAT and IFAT-IgG tests, positive with PCR-RFLP genotyping at multiple loci, and parasites were isolated from mice infected with sheep tissue samples. Two additional sheep born in Brazil, a 2-year-old female Polwarth (Ideal) sheep, a breed originated from Australia (#1), and a 1-year-old male Corriedale sheep, a breed originated from New Zealand and Australia (#2) were positive to T. gondii antibodies by serum tests, and PCR, but negative for bioassay in mice. In genotyping at 12 loci, sheep #1 sample and #2 presented positive results only for some markers. PCR-RFLP of 18S ribosomal RNA (18S rRNA) was performed in all 22 animals to identify the possibility of co-infection of T. gondii with other Apicomplexa parasites, such as S. tenella, Neospora caninum and Hammondia hammondi, resulting in a T. gondii profile for the first 20 animals and a unique genotyping profile for sheep #1 and #2, identical to S. tenella. The 18S rRNA PCR products (310 bp) were sequenced and blasted to GenBank database at NCBI. Both samples were identical to S. tenella 18S rRNA gene (GenBank accession number L24383-1). These results suggest the existence of co-infection of S. tenella with T. gondii in ewes from Brazil. 相似文献