%0 Dataset
%T Alxa Plateau Hexi Corridor Desert Plant DNA Barcode Dataset (2017-2021)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/70aab4ca-b154-48f5-9499-7c631c97859c
%W NCDC
%R 10.12072/ncdc.i-veg.db7041.2025
%A ZHAO Xueyong
%K DNA barcode;ITS;matK;rbcL;trnL-F;trnH-psbA
%X This dataset is based on raw sequence data, which has been double compared with GenBank and local databases, and further analyzed using genetic distance analysis (such as Barcoding Gap and sequence similarity comparison) and phylogenetic tree analysis to systematically eliminate low-quality and redundant sequences. This processing flow significantly improves the accuracy of species identification and the overall reliability of the database, ultimately constructing a high-quality DNA barcode reference database for seed plants in arid regions of China. We have also updated the v2 version of the database, which contains sequence data that has been synchronized and made public in GenBank, in order to provide a more solid, continuously updated, and publicly accessible data foundation for regional biodiversity monitoring and protection.  This dataset focuses on the arid climate characteristics of the desert areas in the Alxa Plateau Hexi Corridor, with the Hexi Corridor and Alxa Plateau in China as the survey core areas, taking into account adjacent areas such as Mazong Mountain, western Qilian Mountains, and arid areas in central Gansu. From 2017 to 2021, the main desert plants distributed in these areas were surveyed, and specimens and DNA molecular materials were collected. According to project requirements, sequence 5 DNA barcode fragments (ITS, matK, rbcL, trnL-F, trnH psBA) from each plant material.  This dataset contains 618 DNA barcode samples with 2769 entries, including 447 samples with 2003 entries from the Alxa Plateau and 171 samples with 766 entries from the Hexi Corridor.