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1.
近交系小鼠微卫星DNA多态性的研究 总被引:22,自引:2,他引:20
随机选择位于小鼠不同染色体上的微卫星引物42对,用PCR技术对C3H、C57、BALB/c、DBA、TA2、T739、B615、BACB/c-nu-nu和SCID等9种实验室常用近交系小鼠微卫星DNA多态性进行了研究。结果显示有信息的40对引物中,9种近交系小鼠在各基因座上均出现一条清晰条带,28个基因座表现为多态性。其中D3Mit22、D7Nds1、D11Mit12、D12Nds2、D15Mit17、D16Mit3、D16Mit4基因座表现为显著多态性。T739、B615和TA2的遗传背景相近,其相似系数分别为90%和85%;其次为TA2、SCID和B615,其相似系数分别为80%和82.5%。结果表明所检测的小鼠符合近交要求,筛选出的引物能典型地反映9个近交系小鼠的品系特异性和遗传背景,可用于常规检测小鼠品系来源和遗传背景等。
Abstract:Forty-two microsatellites DNA loci on different chromosomes in nine kinds of inbred strain mice including C3H,C57,BALB/c,DBA,TA2,T739,B615,BALB/c-nu-nu and SCID were investigated by PCR analysis.It showed that all these mice tested display single allelic gene band with forty pairs of informative primers.Twenty-eight loci are polymorphisms,among which the polymorphisms of D3Mit22,D7Nds1,D11Mit12,D12Nds2,D15Mit17,D16Mit3,and D16Mit4 loci are significant.The genetic background of T739 was similarity with that of B615 and TA2 ,the similarity indices were 90% and 85% respectively;and that of TA2 was similarity with SCID and B615,the similarity indices were 80% and 82.5%.These results suggest that these mice tested meet the request of inbred strain.Screened primers showing marked polymorphisms topically reflect the speciality of strains and genetic backgrounds,which could be used in determining the strains origin and genetic background of mice. 相似文献
2.
JL-02多位点探针DNA指纹在近交系小鼠遗传监测中的应用 总被引:3,自引:2,他引:1
以公安部二所研制的JL-02多位点探针进行了BALB/C、C57、DBA/2、615和ICR5个品系近交系小鼠DNA指纹分析。结果表明,不同近交系小鼠的DNA指纹图差异很大,而同一品系DNA指纹图基本一致,从而证明这一新探针适用于利用DNA指纹技术对近交系小鼠进行遗传监测并具有高度多态性。
Abstract:To explore the possibility of using the probe JL-02 by the Public Safety Bureau of China in monitoring genetic quality of inbred mic e. Fingerprinting of 5 strains of the inbred mice (BALB/c、C57、DBA/2、615、ICR) was conducted using a nonisotopically HRP labeled JL-02 and southern blot hybri dization. The patterns were completely different among the 5 strains of the mice and those of the samples from the same strains were completely identical and th e probe has the high polymorphism. 相似文献
3.
应用40对微卫星引物对6种近交系小鼠遗传背景进行监测的研究 总被引:5,自引:0,他引:5
采用40对引物的微卫星DNA PCR遗传质量符合要求的BALB/C-nu0nu-,DBA/2,SCID,T739,TA2,615等6种近交系小鼠进行遗传监测,结果26对引物有稳定的扩增结果,5对引物表现为单态性,21对引物表现出多态性,其中D2Nds3,D3Mitl5,D3Mitl7,D3Mit18,D16Mit7等6对引物表现出显著的多态性,反映了各品系小鼠独特的遗传背景,可应用于区别小鼠品系,监测系间的遗传污染,为有关小鼠品系积累了遗传背景资料,有助于将实验动物的遗传监测从表墼这度到DNA水平。 相似文献
4.
PCR扩增近交系大鼠微卫星位点DNA多态性的研究 总被引:1,自引:0,他引:1
李瑞生 陈振文 宋德光 任文陟 栾蓉晖LI Rui-sheng CHEN Zhen-wen SONG De-guang REN Wen-zhi LUAN Rong-hui 《遗传》2001,23(6):539-313
本实验选取大鼠7条染色体上的微卫星位点合成了10对引物,利用聚合酶链反应(PCR)扩增技术对国内北京和哈尔滨等4家单位提供的6个品系(SHR、SHRSP、LEW、RCS、WKY和F344)的8个近交系大鼠群体进行了DNA多态性分析的研究.结果表明:9个微卫星位点具有显著多态性;不同品系个体之间具有多态性;同一群体不同个体之间除SHR(哈)的SMST位点和WKY(哈)的AGT位点出现一定的差异外,其他均没有差异;不同地区同一品系的不同个体之间也存在一定的差异.该方法能有效地对近交系与杂交系、品系与品系、品系与亚系加以区分.因此,本实验为开展近交系大鼠遗传作图、基因定位和为实验动物的遗传背景监测提供可靠的信息,为大鼠遗传基因的研究提供了一个快捷简便、特异准确的方法。
Abstract:In the experiment,It were selected that 20 primers were assigned on 7 chromosomes of inbred rat.DNA polymorphism of 8 colonies from 6 inbred rat strains(SHR、SHRSP、WKY、LEW、RCS、F344)were studied in national Beijing and Harbin using PCR-analyzed microsatellites.The results indicated that there were remarkable polymorphism in 9 microsatellite loci;There is a polymorphism among the various rat strains;and no polymorphism in the same rat strains except SMST locus of SHR(Harbin)and AGT locus of WKY(Harbin)and there is a little difference among the same inbred rat strains in different areas.The method of PCR-analyzed microsatellites can be used for distinguishing between inbred and outbred、different strains、strain and substrain.and it provides a lot of information for genetic mapping,gene location and heredity probe of the inbred rat strains,and a speedy、convenient method for genetic research of the inbred rat. 相似文献
5.
三品系小型猪35个微卫星基因座的遗传学研究 总被引:30,自引:5,他引:30
利用35个微卫星基因座对中国三个品系的小型猪(贵州小型香猪、广西巴马小型猪、版纳小耳猪近交系)进行了遗传检测。计算出三个小型猪品系个体样本在35个微卫星基因座的纯合率,并对其进行t检验。计算出各品系的平均杂合度,多态信息含量(PIC)及品系间的遗传距离,并进行了系统聚类。结果表明三个品系的小型猪其基因纯合率均较高,其中版纳小耳猪近交系的基因纯合率最高;PIC和平均杂合度均较低;贵州小型香猪和广西巴马小型猪亲缘关系较近,并均与版纳小耳猪近交系的亲缘关系略远。
Abstract:The polymorphism of 35 microsatellites in the three miniature pig breeds in China(Guizhou miniature pig, Guangxi Bama miniature pig, Banna miniature pig inbred) was analysed. Rates of homozygote for 35 microsatellite loci in three miniature pig breeds were calculated,and t-test for them were performed. Mean heterozygosity and polymorphism information content(PIC) were calculated for all breeds, and genetic distances between these breeds were estimated. The dendrograms were obtained based on genetic distances. The results suggest that rates of homozygote in the three breeds are all high, and that is the highest in Banna miniature pig inbred. The results also suggest that polymorphism information content and mean heterozygosity in all the three breeds are low, and the genetic relationship between Guizhou miniature pig and Guangxi Bama miniature pig is closer than their relationship with Banna miniature pig inbred. 相似文献
6.
近交系NJS小鼠的育种及其特性研究 总被引:1,自引:0,他引:1
近交系NJS小鼠是通过连续全同胞交配和在固定的普通日粮下以70日龄血清胆固醇含量为选育指标定向选育而成,经多项遗传监测证实已符合近交系动物的纯度要求,并具有独特的遗传概貌和特性。近交20世代后,该品系血清胆固醇含量为5.65±0.83mmol/L, 已超过小鼠的正常值范围,显示该品系小鼠已呈自发性高胆固醇血症状态。该品系8-10月龄动脉硬化在好发部位,如主动脉窦、升主动脉的阳性检出率为100%,主要是处于脂斑和脂纹期的病变。该品系可作为自发性高胆固醇血症和动脉粥样硬化症的模型动物。
Abstract:Inbred NJS mouse strain was bred by using continuous brother-sister mating and directive breeding on the common diet with serum cholesterol at 70 days as breeding index,Acording to various genetic monitoring,the strain has been bred as a standard inbred strain of mice in genetic homogeneity,with particular genetic system and specific property.After 20th generation,serum cholesterol of the strain was 5.65±0.83 mmol/L.This value went outside the normal range in mice showing that the strain was in a situation of spontaneous hypercholesterolemia.Its incidence of atheroscerosis was 100% in some liable positions such as aortic sac and ascending aorta at 8~10 months.Most of the pathological changes were in fatty streaks.The strain may be used as a animal model of spontaneous hypercholesterolemia and atherosclerosis. 相似文献
7.
目的 分析BALB/c等八个近交系小鼠线粒体DNA(mtDNA)的多态性 ,探讨近交系小鼠的遗传监测方法。方法 PCR -RFLP技术 ,即PCR技术结合限制性内切酶片段长度多态分析 (restrictionfragmentlengthPolymorphism ,RFLP)。结果 mtDNAD -Loop、tR NAIle GIN Met、ND3基因片段经HaeⅢ、HinfⅠ、EcoRV、HindⅢ、HpaⅠ、BamHⅠ、ApaⅠ、NdeⅡ、XhoⅠ、XbaⅠ、AluⅠ、RsaⅠ、StuⅠ、DraⅠ、AvaⅠ、HaeⅡ 16种内切酶分别消化后 ,BALB/c、C3H、C57BL/ 6J、T739、DBA/ 2、TA2、6 15、BALB/c -nu/nu等小鼠均表现出相同的酶切格局 ,未发现多态性。结论 BALB/c、C3H、C57BL/ 6J、T739、DBA/ 2、TA2、6 15、BALB/c -nu/nu等近交系小鼠遗传背景较为狭窄 ,不同品系小鼠间遗传背景的差异远远低于动物种属间的差异 相似文献
8.
Chenyang Hao Lanfen Wang Xueyong Zhang Guangxia You Yushen Dong Jizeng Jia Xu Liu Xunwu Shang Sancai Liu Yongsheng Cao 《中国科学:生命科学英文版》2006,49(3):218-226
Genetic diversity of 1680 modern varieties in Chinese candidate core collections was analyzed at 78 SSR loci by fluorescence detection system. A total of 1336 alleles were detected, of which 1253 alleles could be annotated into 71 loci. For these 71 loci, the alleles ranged from 4 to 44 with an average of 17.6, and the PIC values changed from 0.19 to 0.89 with an average of 0.69. (1) In the three genomes of wheat, the average genetic richness was B>A>D, and the genetic diversity indexes were B>D>A. (2) Among the seven homoeologous groups, the average genetic richness was 2=7>3>4>6>5>1, and the genetic diversity indexes were 7>3>2>4>6>5>1. As a whole, group 7 possessed the highest genetic diversity, while groups 1 and 5 were the lowest. (3) In the 21 wheat chromosomes, 7A, 3B and 2D possessed much higher genetic diversity, while 2A, 1B, 4D, 5D and 1D were the lowest. (4) The highest average genetic diversity index existed in varieties bred in the 1950s, and then it declined continually. However, the change tendency of genetic diversity among decades was not greatly sharp. This was further illustrated by changes of the average genetic distance between varieties. In the 1950s it was the largest (0.731). Since the 1960s, it has decreased gradually (0.711, 0.706, 0.696, 0.695). The genetic base of modern varieties is becoming narrower and narrower. This should be given enough attention by breeders and policy makers. 相似文献
9.
用PCR -SSCP方法分析BALB/c等 7个近交系小鼠线粒体DNA (mtDNA)的多态性 ,探讨其遗传起源及亲缘关系 ,结果发现 ,这些小鼠mtDNA的高变异性区 ,D -loop 5′及 3′端的SSCP电泳带型完全相同 ,未发现多态性。表明TA2、 6 15、T739、BALB/c、C3H、C5 7BL/ 6J、DBA/ 2等近交系小鼠的mtDNA具有高度的同源性。 相似文献
10.
This study introduces the construction of the first intraspacific genetic linkage map of the A-genome diploid cotton with newly developed simple sequence repeat (SSR) markers using 189 F2 plants derived from the cross of two Asiatic parents were detected using 6 092 pairs of SSR primers. Two-hundred and sixty-eight pairs of SSR pdmers with better polymorphisms were picked out to analyze the F2 population. In total, 320 polymorphic bands were generated and used to construct a linkage map with JoinMap3.0. Two-hundred and sixty-seven loci, Including three phenotypic traits were mapped at a logarithms of odds ratio (LOD) ≥ 3.0 on 13 linkage groups. The total length of the map was 2 508.71 cM, and the average distance between adjacent markers was 9.40 cM. Chromosome assignments were according to the association of linkages with our backbone tetraploid specific map using the 89 similar SSR loci. Comparisons among the 13 suites of orthologous linkage groups revealed that the A-genome chromosomes are largely collinear with the At and Dt sub-genome chromosomes. Chromosomes associated with inversions suggested that allopolyploidization was accompanied by homologous chromosomal rearrangement. The inter-chromosomal duplicated loci supply molecular evidence that the A-genome diploid Asiatic cotton is paleopolyploid. 相似文献