Evaluating the Discriminatory Power of DNA Barcodes in Panicoideae, Poaceae

作     者：Jeongran Lee Chang-Seok Kim In-Yong Lee 

作者机构：Department of Crop Life Safety National Academy of Agricultural Science Rural Development Administration Suwon 441- 701Republic of Korea 

出 版 物：《Journal of Agricultural Science and Technology(B)》 (农业科学与技术（B）)

年 卷 期：2014年第4卷第7期

页      面：533-544页

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 08[工学] 0905[农学-畜牧学] 09[农学] 071007[理学-遗传学] 0836[工学-生物工程] 090501[农学-动物遗传育种与繁殖] 

主　　题：Plant barcode Poaceae core barcode markers nrITS resolving power. 

摘      要：DNA barcoding is a powerful technique for species identification with little morphological knowledge, by using short sections of DNA from a specific region of the genome. Two core barcode markers, rbcL and matK, and a supplementary nuclear ribosomal internal transcribed spacer region were used to examine the effectiveness of the markers for Poaceae barcoding using 133 individuals of 36 taxa across 23 genera of Korean Panicoideae. We also aimed to establish a DNA barcode database for the major weeds of Korean Panicoideae. All three markers revealed a good level of amplification and sequencing success. As a single DNA marker, the ITS region achieved the highest species resolution, followed by matK. Resolving power was increased when nrlTS was incorporated into the core barcode markers. The best resolving power was obtained with a combination of matK ＋ ITS with 89.7%, followed by rbcL ＋ matK ＋ ITS with 89.3%. Thus, rbcL may be not necessary as a DNA barcode for Panicoideae species identification, when considering cost and effectiveness. Instead, a combination of matK ＋ ITS is proposed as the most suitable DNA barcode for the species identification of Panicoideae, Poaceae. We conclude that DNA barcoding using a combination of matK ＋ ITS could be one of powerful techniques for the identification of Poaceae species, The barcode sequences were deposited to the National Center for Biotechnology Information （NCBI） database for public use.