We developed a species-specific PCR method to identify species among dehydrated products of 10 sea cucumber species.Ten reverse species-specific primers designed from the 16 S rRNA gene,in combination with one forward...We developed a species-specific PCR method to identify species among dehydrated products of 10 sea cucumber species.Ten reverse species-specific primers designed from the 16 S rRNA gene,in combination with one forward universal primer,generated PCR fragments of ca.270 bp length for each species.The specificity of the PCR assay was tested with DNA of samples of 21 sea cucumber species.Amplification was observed in specific species only.The species-specific PCR method we developed was successfully applied to authenticate species of commercial products of dehydrated sea cucumber,and was proven to be a useful,rapid,and low-cost technique to identify the origin of the sea cucumber product.展开更多
化脓链球菌是一种常见的食源性致病菌,从19世纪80年代起,化脓链球菌引起的感染在全球范围内呈逐步上升之势并发展成为人类重要致病菌之一。通过已公布的13株化脓链球菌的基因组序列找出具有种特异性的基因序列。运用BLAST(Basic Local A...化脓链球菌是一种常见的食源性致病菌,从19世纪80年代起,化脓链球菌引起的感染在全球范围内呈逐步上升之势并发展成为人类重要致病菌之一。通过已公布的13株化脓链球菌的基因组序列找出具有种特异性的基因序列。运用BLAST(Basic Local Alignment Search Tool,基本局部比对工具)在GenBank中进行序列对库的比对结果表明:化脓链球菌的某些基因(SmeZ,emm,spyM51755)具有种特异性。以这些基因为目的基因,共设计七对引物。经PCR(Polymerase Chain Reaction,聚合酶链式反应)检测发现spyM引物对(spyM51755F,spyM51755R)具有很高的特异性。利用该引物对,建立可快速且灵敏地检测食品中化脓链球菌的PCR方法,其灵敏度达到10 cfu/g样品。展开更多
Dear Editor,Although simple sequence repeat（SSR）markers are not new,they are still useful and often used markers in molecular mapping and marker-assisted breeding,particularly in developing countries.However,locus-s...Dear Editor,Although simple sequence repeat（SSR）markers are not new,they are still useful and often used markers in molecular mapping and marker-assisted breeding,particularly in developing countries.However,locus-specific SSR markers could be more useful and informative in wheat breeding and genetic studies.In the present study,221,911 locus-specific SSR markers were designed.Verification of polymorphisms showed that the proportion of polymorphic markers increases with an increase in SSR size.展开更多
基金Supported by the National Natural Science Foundation of China(No.31201999)the Natural Science Foundation of Guangdong Province,China(No.S2011040000463)+4 种基金the Foundation for Distinguished Young Talents in Higher Education of Guangdong,China(No.LYM11086)the Key Laboratory Program of Tropical Marine Bio-Resources and Ecology,Chinese Academy of Science(No.LMB111004)the China Spark Program(Nos.2012GA780007,2012GA780020,2012GA780008)the National Students'Innovation and Entrepreneurship Training Project(No.201210579031)the Zhanjiang Foundation for Science and Technology,China(Nos.2011C3104009,2011D0244,2012C3102018)
文摘We developed a species-specific PCR method to identify species among dehydrated products of 10 sea cucumber species.Ten reverse species-specific primers designed from the 16 S rRNA gene,in combination with one forward universal primer,generated PCR fragments of ca.270 bp length for each species.The specificity of the PCR assay was tested with DNA of samples of 21 sea cucumber species.Amplification was observed in specific species only.The species-specific PCR method we developed was successfully applied to authenticate species of commercial products of dehydrated sea cucumber,and was proven to be a useful,rapid,and low-cost technique to identify the origin of the sea cucumber product.
基金supported by the National Natural Science Foundation of China(31270704,31600997)the Yangzhou Key Research and Development Program(YZ2016035)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
文摘Dear Editor,Although simple sequence repeat（SSR）markers are not new,they are still useful and often used markers in molecular mapping and marker-assisted breeding,particularly in developing countries.However,locus-specific SSR markers could be more useful and informative in wheat breeding and genetic studies.In the present study,221,911 locus-specific SSR markers were designed.Verification of polymorphisms showed that the proportion of polymorphic markers increases with an increase in SSR size.
