Parentage testing of Thoroughbred horse in Korea using microsatellite DNA typing     

Sun-young Lee  Gil-jae Cho 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(1):63-67

The present study was to construct a parentage testing system for Thoroughbred (TB) horse. A total number of 1,285 TB horse samples including 962 foals for parentage testing, 9 sires and 314 dams for individual identification were genotyped. Genomic DNA was extracted from 5 hair roots and genotyped by using 14 microsatellite markers (AHT4, AHT5, ASB2, ASB17, ASB23, CA425, HMS1, HMS3, HMS6, HMS7, HTG4, HTG10, LEX3 and VHL20). This method consisted of multiplexing PCR procedure and showed reasonable amplification of all PCR products. Genotypes were determined by genetic analyzer. The number of alleles per locus varied from 3 to 9 with a mean value of 6.36 in TB horse. The expected heterozygosity was ranged from 0.548 to 0.831 (mean 0.699), and the total exclusion probability of 14 microstellite loci was 0.9998. Of the 14 markers, ASB2, ASB17, ASB23, HMS7 and HTG10 loci have relatively high PIC value (> 0.7). Of the 962 foals, 960 foals were qualified by compatibility according to the Mendelism. These results suggest that the DNA typing method has high potential for parentage verification and individual identification of TB horses.  相似文献   

Alpha-amylase/subtilisin Inhibitor Levels in Australian Barleys     

S.J Jarrett  RJ Marschke  M.H Symons  C.E Gibson  R.J Henry  G.P Fox 《Journal of Cereal Science》1997,25(3):261-266

An enzyme-linked immunosorbent assay (ELISA) was used to determine the bifunctional alpha-amylase/subtilisin inhibitor (BASI) content of barley grain from 11 cultivars grown in six diverse locations in Australia. The inhibitor ranged from 119 to 254 μg/g in 57 barley samples. Genotype had a significant (P<0·05) effect on BASI content but there was no effect due to environment. Total protein varied independently of BASI and was influenced by environment and genotype. BASI content was higher (P<0·05) in malting barley than in feed barley and was correlated positively (r=0·29;P<0·05) with alpha-amylase activity in corresponding malts. The ELISA used monoclonal and polyclonal antibodies raised against purified BASI. In immunoblot analysis the monoclonal antibody showed high specificity for the inhibitor in barley and also detected the inhibitor in wheat. Low levels of inhibitor (mean 3·2 μg/g) were found in 12 Australian wheat cultivars using the ELISA developed for barley. The assay had a linear working range of 5–50 ng/mL with a detection limit of 2 ng/mL. Reproducibility between assays was good (CV=4·9%) but mean recoveries were high, ranging from 116–129% when purified inhibitor was added to barley extracts. The ELISA may have useful applications in brewing research and barley breeding programmes.  相似文献   

牛源多杀性巴氏杆菌主要荚膜群和脂多糖基因型两组三重PCR检测方法     

李霄阳  许建  刘文晓  章振华  徐福洲  陈小玲  李永清 《中国动物检疫》2022,39(1):97-104

为掌握国内牛源多杀性巴氏杆菌流行的主要荚膜群及脂多糖基因型,建立了检测多杀性巴氏杆菌(Pm)及其A、B荚膜群的三重PCR(PmAB-3PCR)以及检测3个脂多糖基因型的三重PCR(LPS-3PCR)方法,检验了其特异性和敏感性,用感染Pm小鼠的组织和人工污染Pm的牛鼻拭子样品进行了临床模拟检验,并对30株P m进行了PCR检测和传统血清学分型比较。结果显示:PmAB-3PCR特异性好,PmAB-3PCR和LPS-3PCR的DNA检测限分别为10~100 pg和1 ng,二者对菌液的检测限分别为200~2000 CFU和2000~20000 CFU。模拟临床样品PmAB-3PCR检测结果与细菌分离结果100%一致。PmAB-3PCR与琼扩试验的符合率为84%,二者检出的阳性率分别为88%和72%,差异不显著(P>0.05);LPS-3PCR与琼扩试验的符合率为60%,检出的阳性率分别为90%和50%,差异显著(P<0.05)。结果表明,建立的两组三重PCR方法准确高效且重复性好,可取代常规血清学方法用于国内牛巴氏杆菌病的诊断、流调和疫苗株筛选。  相似文献   

马尾松种源基因型×环境互作及其稳定性的研究   总被引：1，自引：0，他引：1  

傅玉狮  梁一池  吴火灶  吕文芳  黄祯澈  刘镇发 《福建林业科技》1993,(2)

福建省4个地域91个种源10年生时试验结果表明:(1)各点马尾松种源生长上差异十分显著,树高、胸径和材积三个性状的遗传方差份量约占总变异的38.92%—42.75%;(2)种源×地点的效应,树高不明显,材积和胸径达显著水准,而种源基因型效应比较明显,其方差份量约为GE互作份量的1倍;(3)根据Francls和Kanuenbery模型计算种源GE互作效应及其稳定性,将参试种源划分为4种类型,其中高产稳定型种源26个,平均材积遗传增益达42.84%,可在全省各地区推广;(4)广西岑溪和广东罗定两个种源生长最为突出,平均村积遗传增益达88%。  相似文献   

Phylogenetic analysis of Newcastle disease viruses isolated from wild birds in the Poyang Lake region of China     

Shengtao FAN  Tiecheng WANG  Xiaolong GAO  Ying YING  Xue LI  Yongcheng LI  Yuanguo LI  Jinzhu MA  Heting SUN  Dong CHU  Yu XU  Songtao YANG  Qihan LI  Yuwei GAO  Xianzhu XIA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(9):1143-1149

Newcastle disease virus (NDV) causes a highly contagious viral disease in poultry and wild birds, and it can cause significant economic loss worldwide. Eight viral strains were isolated by inoculating embryonated chicken eggs from the Poyang Lake region of China with swab samples. All eight of the NDV isolates were identified as class I genotype 3 strains, but they diverged notablely from class II viruses. Further analysis revealed that all eight NDV isolates were lentogenic strains containing the ¹¹²ERQER↓L¹¹⁷ motif at the F protein cleavage site. The strains were highly identical and were more species specific (chicken and waterfowl) than site specific (Nanchang and Duchang regions). The close phylogenetic proximity of these isolates indicates that viral transmission may happen between poultry and wild birds. Our study demonstrates that lentogenic class I NDVs exist in clinically healthy wild waterfowl and poultry within the Poyang Lake region. Active surveillance of these viruses to determine their evolution and origin is one of the most realistic strategies for preventing and controlling NDV outbreaks.  相似文献   

基于 SSR 标记的广东含笑等 11 个 含笑属物种亲缘关系研究   总被引：1，自引：0，他引：1  

徐放  朱报著  潘文  朱政财  钟乃盛  李文业  赵强民 《广东农业科学》2021,48(1):87-93

【目的】含笑属植物是我国南方地区重要的园林绿化和用材树种,但目前种间的遗传关系尚不明确,以开发高效的基因分型手段进行各物种亲缘关系研究,可为含笑属的保护和开发利用提供理论和技术支撑。【方法】以广东含笑等11个物种为研究材料,筛选高多态性SSR引物,利用基于M13序列的荧光标记方法获取基因分型数据,计算遗传多样性参数,并利用Neighbor-Joining(NJ)方法构建进化树,分析种间的亲缘关系。【结果】12对SSR引物均具有较高的多态性,扩增成功率为90.9%,可以高效地完成基因分型,12个标记的平均等位基因数为8.17;Shannon多样性指数(I)平均值为1.836;观测杂合度(Ho)、期望杂合度(He)和多态信息含量(PIC)的平均值分别是0.365、0.839和 0.796。聚类分析结果显示,分属不同亚属的物种在NJ进化树上可以被明显区分开来,其中后生含笑亚属物种被聚类在两个主要分支上,含笑亚属的3个物种被聚类在一个主要分支上,亲缘关系分析结果与以往的分类学研究结果一致。【结论】SSR标记基因分型体系可以较好地完成广东含笑等11个物种的基因分型,在未来的杂交亲本评选、亲本选配和杂交子代亲缘关系鉴定等方面均可以发挥重要作用。  相似文献   

珠母贝属6个种的ITS 2分子标记研究   总被引：6，自引：3，他引：6  

喻达辉  朱嘉濠 《南方水产》2005,1(4):6-12

对珠母贝属的大珠母贝、珠母贝、白珠母贝、黑珠母贝、长耳珠母贝、黑珠母贝和合浦珠母贝6个种的内部转录间隔区2(ITS2)序列及其两侧的5.8S和28S的部分序列进行了比较分析。其中黑珠母贝的序列来自GenBank。PCR扩增片段大小为600bp左右,测序结果表明,ITS2长211～254bp,两端的5.8S和28S分别长84bp和272bp(均含引物)。序列比对分析结果表明,5.8S和28S序列高度保守,不适合于种类鉴定,而ITS2序列高度变异,270个比对位点中有146个位点发生突变,其中72个位点发生插入/缺失突变。除白珠母贝和黑珠母贝之间的遗传距离较小外,其余种类之间的遗传距离远远大于种内遗传距离。基因型分析表明,每个种具有各自特有的基因型。基因型和序列变异分析表明ITS2序列可作为珍珠贝种类鉴定的分子标记。可用于种间、杂交育种、幼体和珍珠贝肉等材料的种类鉴定与遗传分析。  相似文献   

Comparative digestibility of low‐quality grass hay by two breeds of cattle differing in mature live weight     

A. L. Lourenço  A. Dias‐da‐Silva  A. S. Santos  M. A. M. Rodrigues  J. W. Cone  L. M. M. Ferreira 《Journal of animal physiology and animal nutrition》2014,98(3):453-457

The digestive capacity of the Portuguese native breed of Barrosão cattle and the Holstein–Friesian breed was measured when fed meadow hay (72–74 g CP and 641–671 g NDF/kg dry matter), offered either alone or supplemented with soya bean meal (150 g/kg dry matter), at maintenance level. Four mature cows of each breed were used. Average initial live weight (LW) was 457 and 635 kg for the Barrosão and the Holstein–Friesian cows respectively. The organic matter digestibility (OMD) of the meadow hay was higher in Holstein–Friesian than in Barrosão cows (p < 0.08) whether supplemented or not. The neutral detergent fibre digestibility of the hay was also higher in Holstein–Frisian when the hay was fed alone (p < 0.08). The soya bean meal supplementation increased the OMD and the NDFD digestibility of the total diet (p < 0.05), but not the OMD digestibility of the hay (p > 0.05). The results obtained in this study suggest a higher ability to digest fibre in the large dairy breed than in the small native breed. This suggestion is also supported by previous findings with sheep breeds largely differing in mature live weight.  相似文献   

Within‐ and across‐breed imputation of high‐density genotypes in dairy and beef cattle from medium‐ and low‐density genotypes     

D.P. Berry  M.C. McClure  M.P. Mullen 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2014,131(3):165-172

The objective of this study was to evaluate, using three different genotype density panels, the accuracy of imputation from lower‐ to higher‐density genotypes in dairy and beef cattle. High‐density genotypes consisting of 777 962 single‐nucleotide polymorphisms (SNP) were available on 3122 animals comprised of 269, 196, 710, 234, 719, 730 and 264 Angus, Belgian Blue, Charolais, Hereford, Holstein‐Friesian, Limousin and Simmental bulls, respectively. Three different genotype densities were generated: low density (LD; 6501 autosomal SNPs), medium density (50K; 47 770 autosomal SNPs) and high density (HD; 735 151 autosomal SNPs). Imputation from lower‐ to higher‐density genotype platforms was undertaken within and across breeds exploiting population‐wide linkage disequilibrium. The mean allele concordance rate per breed from LD to HD when undertaken using a single breed or multiple breed reference population varied from 0.956 to 0.974 and from 0.947 to 0.967, respectively. The mean allele concordance rate per breed from 50K to HD when undertaken using a single breed or multiple breed reference population varied from 0.987 to 0.994 and from 0.987 to 0.993, respectively. The accuracy of imputation was generally greater when the reference population was solely comprised of the breed to be imputed compared to when the reference population comprised of multiple breeds, although the impact was less when imputing from 50K to HD compared to imputing from LD.  相似文献   

镜鲤两个繁殖群体的遗传结构和几种性状的基因型分析   总被引：9，自引：2，他引：9  

孙效文  鲁翠云  匡友谊 《水产学报》2007,31(3):273-279

利用扩增效果好、在群体中具有多态性的28个微卫星标记，检测国家换新良种场的镜鲤繁殖群体和黑龙江水产研究所松浦实验场的镜鲤繁殖群体的遗传组成，计算了两个群体的有效等位基因数，期望杂合度和多态信息含量等遗传参数，换新与松浦两个群体的有效等位基因数分别为2.874和3.102, 期望杂合度分别是0.565和0.603,多态信息含量分别是0.534和0.568；遗传结构分析研究结果表明这两个群体的多样性较高,信息含量丰富,具有进一步筛选出优良品种的遗传基础。但连锁不平衡分析表明这两个群体在较大的选择压力下，已严重偏离Hardy-Weniberg平衡，要保持群体的优良性状相关的遗传基础，应该在进一步的选种中注意增加群体的遗传多样性。也用28个基因座的不同基因型与换新208个亲本的体重值进行了连锁分析，得到12个与镜鲤体重相关的基因型，其中紧密相关的基因型3个；分析了一些严重偏离平衡的基因型，并分析了出现这种现象的可能原因，同时探讨了一些基因型与胚胎期致死或易感病基因连锁的可能性。为描述基因型偏离程度，创造了基因型偏离指数，并用其对群体中一些基因型出现的偏离现象进行了探讨。图1表2参19  相似文献