RAPD分析在绢丝昆虫亲缘关系研究中的应用Ⅱ.柞蚕品种间的遗传差异

采用RAPD技术,对5个柞蚕品种的遗传差异进行比较研究.结果表明,所采用的40个随机引物中,有27个引物扩增谱带清晰且重复性较好,扩增总片段数253条,单个引物的扩增片段数在4～16之间,片段大小在0.33～3.0kb之间.不同柞蚕品种间的遗传差异较小,遗传距离(D)在0.066～0.1659之间,根据D值,由UPGMA聚类分析软件绘制了它们的分子进化树。 Abstract:Random amplified Polymorphic DNA (RAPD) was used to analyze the genetic diversity among Antheraea pernyi.The genetic variance of five Antheraea pernyi was studied.The result showed that:27 of 40 arbitrary primers could amplify clear and repeating bands.A total of 262 fragments were obtained.Each primer gave 4~16 bands and the average was 9.7.The length of the band was 0.33~3.0kb.The D value between different breeds of Antheraea pernyi was 0.066~0.1659.The D value was used to construct a dendrogram by UPGMA.     

RAPD分析在绢丝昆虫亲缘关系研究中的应用Ⅰ.蓖麻蚕品种间的遗传差异

用RAPD技术对蓖麻蚕基因组DNA进行多态性研究，分析了5个蓖麻蚕品种间的遗传差异。结果表明，所采用的40个随机引物中，有27个引物扩增谱带清晰且重复性较好，扩增总片段数达243个，单个引物的扩增片段数在4～17之间，平均为9条，片段大小在033～30kb之间。不同蓖麻蚕品种间的遗传距离(Ｄ)在00683～01603之间，根据Ｄ值，由UPGMA聚类分析软件绘制了它们的聚类分子树。     

条纹斑竹鲨基因组的RAPD分析初报

采用11种随机引物对4 条条纹斑竹鲨基因组进行了RAPD检测.结果表明,11种引物在每条个体上扩增的 DNA片段总数在77～84之间,单个随机引物扩增的DNA片段数目由1至11条不等,平均为7.5条 DNA 片段,片段的大小在 300～2 800bp之间.个体之间的相似率在90%以上.     

条纹斑竹鲨线粒体DNA的研究

用6种限制性内切酶分析了4条条纹斑竹鲨的线粒体DNA(mtDNA)。PstⅠ、Hpa Ⅰ、XbaⅠ、EcoRⅠ、EcoRⅤ、BglⅡ在条纹斑竹鲨mtDNA分子上分别具有0至2个切点, mtDNA分子大小为16.6kb,根据单酶和双酶完全酶解片段的大小,构建了条纹斑竹鲨mtDNA 的限制性酶切图谱。 Abstract:Mitochondrial DNA(mtDNA)form 4 samples of Chiloscyllium plagiosum was analyzed by 6 kinds of restriction.The number of cleavage sites were as follow:2 for HpaI,XbaI and EcoRI respectively;1 for BglII and EcoRV respectively;None for PstI.Molecular size of mtDNA was found to be 16.6kb.According to analysis of single and double enzyme cleavage,the map of restriction enzyme was constructed.     

五种绢丝昆虫随机扩增多态性DNA分析

本文对家蚕、野桑蚕、蓖麻蚕、柞蚕和天蚕等5种绢丝昆虫进行了随机扩增多态DNA(RAPD)分析。40个引物中有27个引物能扩增出536个清晰且重复性强的条带,其中可变条带数为520个,单个引物扩增的条带数在11～28之间,平均为19.9,各片段分子量大小在0.29～2.67kb之间。每个样本都能找出其独特的分子标记。家蚕与野桑蚕的遗传距离(D)最小,为0.3760;家蚕与蓖麻蚕的遗传距离(D)最大,为0.7488。根据遗传距离,用UPGMA聚类分析方法构建了它们的分子树。 Abstract：Five species of silk insects including Bombyx mori, B. manolarina, Philosamia cynthia, Autheraea pernyi and A. yamamai were analyzed by RAPD method using 40 arbitrary primers. In these primers, 27 of them could amplify clear and repeating bands. 536 fragments were obtained and the variable bands were 520. Each primer gave 11～28 bands and the average was 19.9. The length of the fragments is 0.29～2.67 kb. Some distinctive bands were found in every species. The genetic distance(D) between bombyx mori and B. manolarina is 0.3760, which is the lowest. The highest D value is 0.7488, which between Bombyx mori and Philosamia cynhia. The D value was then used to construct a dendrogram by unweighted pair-group method with arithmetical averages(UPGMA).     

RAPD分析在绢丝昆虫亲缘关系研究中的应用I.蓖麻蚕品种间的遗传差异

用RAPD技术对蓖麻蚕基因组DNA进行多态性研究,分析了5个蓖麻蚕品种间的遗传差异。结果表明,所采用的40个随机引物中,有27个引物扩增谱带清晰且重复性较好,扩增总片段数达243个,单个引物的扩增片段数在4～17之间,平均为9条,片段大小在0.33～3.0kb之间。不同蓖麻蚕品种间的遗传距离(D)在0.0683～0.1603之间,根据D值,由UPGMA聚类分析软件绘制了它们的聚类分子树。 Abstract：Random amplified Polymorphic DNA (RAPD) was used to analyze the genetic diversity among eri sickworm. The genetic variance of five erisickworm was studied. The result showed that: 27 of 40 arbitrary primers could amplify clearly with repeatable bands.243 fragments were obtained.Each primer gave 4～17 bands and the average was 9.The length of the band was 0.33～3.0kb. The genetic distance (D) value between different breeds of Eri Silkworm was 0.0683～0.1603. The D value was used to construct a dendrogram by UPGMA.     

四种启动子调控RFP报告基因在家蚕细胞(Bm-e-HNU5)内的瞬时表达

以红色荧光蛋白基因（RFP）为报告基因,构建含4种不同启动子的重组表达质粒,用脂质体介导法转染家蚕Bombyx mori细胞（Bm-e-HNU5）,观察家蚕细胞质肌动蛋白4基因启动子（A4）、α微管蛋白基因启动子（α-tub）、蚕丝心蛋白重链基因启动子（Fib）和家蚕核型多角体病毒早期即刻蛋白基因启动子（IE）4种启动子调控RFP报告基因在家蚕细胞内的瞬时表达情况。构建的重组表达质粒pDsRed-α-tub、pDsRed-A4、pDsRed-IE和pDsRed-Fib经双酶切和PCR鉴定正确无误。转染和转录实验结果表明,除了pDsRed-A4外,其他3种重组质粒在Bm-e-HNU5细胞中都得到高转染率,α-tub、IE和Fib可依次增强RFP报告基因在家蚕细胞内的瞬时表达活性。     

家蚕微卫星DNA的研究进展

概述了分子标记技术,就其中的微卫星标记技术的原理、方法与特点进行了介绍,重点就该技术在家蚕中的研究进展进行了综述,并展望了该技术在家蚕的遗传分析、辅助选择育种等应用中的前景。     

RAPD分析在绢丝昆虫亲缘关系研究中的应用：Ⅱ．柞蚕品种间的遗传差异

采用RAPD技术,对5个柞蚕品种的遗传差异进行比较研究,结果表明,所采用40个随机引物中,有27个引物扩增谱清晰且重复性较好,扩增总片段数253条,单个引物的扩增片段数在4－16之间,片段大小在0．33－3．0kb之间。不同柞蚕品种间的遗传差异较小,遗传距离（D）在0．066－0．1659之间,根据D值,由UPGMA聚类分析软件绘制了它们的分子进化树。     

家蚕与蓖麻蚕杂交后代变异机理探讨:基因组RAPD检测

采用24种随机引物, 对以蓖麻蚕精子进行人工授精得到的家蚕后代中的3个稳定变异品系及其亲本的基因组进行了RAPD检测, 结果显示,在变异品系的RAPD图谱中, 不仅存在大量与母本相同的“亲本带”,同时还出现了不同数量与母本不同的“变异带”,包括“非亲本带”、“缺失带”及个别仅与父本相同的“目的带”,从分子水平上揭示了变异品系存在着明显的“偏母性”与“变异性”特点。 Abstract:Twenty-four random primers were used to analyze the genomes of three descendant strains with steady hereditable variation produced form domesticated silkworm by artificial insemination with sperms of eri silkworm.The results show that in the RAPD patterns there are are many amplified bands called “parental bands” which are similar to those of the female parent.At the same time,there appears varied amount of amplified bands called“variant bnads”that are different from those of the female parent.The variant bands include non-parental-bands,lost-bands and several“expected-bands”which only shared with the male parent.This research reveals the significant matrocliny and variation in the descendant strains at the mole