为全面了解植物DNA条形码研究领域的发展和最新动态,探讨中国DNA条形码发展的状态和前景,该文利用Web of Science数据库对该研究领域进行文献计量学统计,并对引用频次、研究热点和研究前沿进行了可视化分析。结果表明:(1)中国、美国、...为全面了解植物DNA条形码研究领域的发展和最新动态,探讨中国DNA条形码发展的状态和前景,该文利用Web of Science数据库对该研究领域进行文献计量学统计,并对引用频次、研究热点和研究前沿进行了可视化分析。结果表明:(1)中国、美国、加拿大学者在该领域文献贡献率最大,中国研究机构发文量领先,但美国、加拿大科研机构论文质量较高,影响力较大。(2) 2009年是该领域研究的高峰期,该研究领域的前沿和研究热点主要集中在物种的识别和生物多样性应用、DNA条形码候选序列筛选和鉴定技术的规范化。(3)中国学者在植物DNA条形码领域研究具有领军作用和很高的影响力,国家提倡中药产业的发展也推动了我国DNA条形码蓬勃发展,但论文的质量和影响力与美国、英国、加拿大等发达国家研究还有一定差距,应加大与发达国家科研机构合作,提高研究能力,DNA条形码技术在植物的鉴定、分类和生物多样性的保护起到非常重要的作用。这表明建立一个更全面、通用的全球植物DNA条码库以及开发新的标记并采用新的测序技术是植物DNA条形码研究的未来前景。展开更多
This study is part of the endeavor to construct a comprehensive DNA barcoding database for common seaweeds in China. Identifications of red seaweeds, which have simple morphology and anatomy, are sometimes difficult s...This study is part of the endeavor to construct a comprehensive DNA barcoding database for common seaweeds in China. Identifications of red seaweeds, which have simple morphology and anatomy, are sometimes difficult solely depending on morphological characteristics. In recent years, DNA barcode technique has become a more and more effective tool to help solve some of the taxonomic difficulties. Some DNA markers such as COI（cytochrome oxidase subunit I） are proposed as standardized DNA barcodes for all seaweed species. In this study, COI, UPA （universal plastid amplicon, domain V of 23S rRNA）, and ITS （nuclear internal transcribed spacer） were employed to analyze common species of intertidal red seaweeds in Qingdao （119.3°-121°E, 35.35°-37.09°N）. The applicability of using one or a few combined barcodes to identify red seaweed species was tested. The results indicated that COI is a sensitive marker at species level. However, not all the tested species gave PCR amplification products due to lack of the universal primers. The second barcode UPA had effective universal primers but needed to be tested for the effectiveness of resolving closely related species. More than one ITS sequence types were found in some species in this investigation, which might lead to confusion in further analysis. Therefore ITS sequence is not recommended as a universal barcode for seaweeds identification.展开更多
文摘为全面了解植物DNA条形码研究领域的发展和最新动态,探讨中国DNA条形码发展的状态和前景,该文利用Web of Science数据库对该研究领域进行文献计量学统计,并对引用频次、研究热点和研究前沿进行了可视化分析。结果表明:(1)中国、美国、加拿大学者在该领域文献贡献率最大,中国研究机构发文量领先,但美国、加拿大科研机构论文质量较高,影响力较大。(2) 2009年是该领域研究的高峰期,该研究领域的前沿和研究热点主要集中在物种的识别和生物多样性应用、DNA条形码候选序列筛选和鉴定技术的规范化。(3)中国学者在植物DNA条形码领域研究具有领军作用和很高的影响力,国家提倡中药产业的发展也推动了我国DNA条形码蓬勃发展,但论文的质量和影响力与美国、英国、加拿大等发达国家研究还有一定差距,应加大与发达国家科研机构合作,提高研究能力,DNA条形码技术在植物的鉴定、分类和生物多样性的保护起到非常重要的作用。这表明建立一个更全面、通用的全球植物DNA条码库以及开发新的标记并采用新的测序技术是植物DNA条形码研究的未来前景。
基金supported by the National Special Research Fund for Non-Profit Sector (Agriculture) (No. 200903030)the National Natural Science Foundation of China (No.41176135)
文摘This study is part of the endeavor to construct a comprehensive DNA barcoding database for common seaweeds in China. Identifications of red seaweeds, which have simple morphology and anatomy, are sometimes difficult solely depending on morphological characteristics. In recent years, DNA barcode technique has become a more and more effective tool to help solve some of the taxonomic difficulties. Some DNA markers such as COI（cytochrome oxidase subunit I） are proposed as standardized DNA barcodes for all seaweed species. In this study, COI, UPA （universal plastid amplicon, domain V of 23S rRNA）, and ITS （nuclear internal transcribed spacer） were employed to analyze common species of intertidal red seaweeds in Qingdao （119.3°-121°E, 35.35°-37.09°N）. The applicability of using one or a few combined barcodes to identify red seaweed species was tested. The results indicated that COI is a sensitive marker at species level. However, not all the tested species gave PCR amplification products due to lack of the universal primers. The second barcode UPA had effective universal primers but needed to be tested for the effectiveness of resolving closely related species. More than one ITS sequence types were found in some species in this investigation, which might lead to confusion in further analysis. Therefore ITS sequence is not recommended as a universal barcode for seaweeds identification.
