Chinese Bulletin of Botany ›› 2017, Vol. 52 ›› Issue (6): 723-732.DOI: 10.11983/CBB16237

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Screening of Universal DNA Barcodes for Vitis amurensis

Song Huifang, Liu Haishuang, Yang Yiming, Fan Shutian, Li Changyu*(), Ai Jun*()   

  1. Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, Changchun 130112, China
  • Received:2016-12-02 Accepted:2017-01-24 Online:2017-11-01 Published:2018-02-22
  • Contact: Li Changyu,Ai Jun

Abstract: To determine the best candidate sequence that can be used as a universal DNA barcode to identify Vitis amurensis varieties, we used PCR amplification with the ideal annealing temperature and sequenced the DNA fragments of five different regions (ITS, ITS2, psbA-trnH, rbcL and matK) of Amur grape samples. The effective sequence ratios obtained by PCR amplification and sequencing, divergence of intra- and inter-varieties, DNA barcoding gap and identification by using BLAST and NJ tree methods were used to evaluate the discrimination ability of these candidate sequences. ITS2 and psbA-trnH had fairly high amplification efficiency and sequencing efficiency in 33 samples belonging to 11 V. amurensis resources; they had larger divergences of intra- and inter-varieties and better DNA barcoding gaps than the other regions tested (ITS, rbcL and matK). In addition, ITS2 could discriminate some varieties that could not be successfully discriminated by the psbA-trnH region. ITS2 and psbA-trnH may be promising DNA barcode region combinations for identifying V. amurensis resources. DNA barcoding can compensate for morphological identification and help in the exact identification of V. amurensis resources.

Key words: Vitis amurensis, DNA barcode, identification, ITS2, psbA-trnH, sequence