Journal of Integrative Agriculture ›› 2019, Vol. 18 ›› Issue (3): 698-704.DOI: 10.1016/S2095-3119(18)62116-1

• 论文 • 上一篇    

  

  • 收稿日期:2018-08-21 出版日期:2019-03-01 发布日期:2019-03-07

Molecular characterization of Apple necrotic mosaic virus identified in crabapple (Malus spp.) tree of China

HU Guo-jun, DONG Ya-feng, ZHANG Zun-ping, FAN Xu-dong, REN Fang
  

  1. Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, P.R.China
  • Received:2018-08-21 Online:2019-03-01 Published:2019-03-07
  • About author:HU Guo-jun, E-mail: hugj3114@163.com; Correspondence DONG Ya-feng, Tel/Fax: +86-429-3598278, E-mail: yfdong@163.com
  • Supported by:
    This study was funded by the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences (CAAS-ASTIP).

Abstract:

Apple necrotic mosaic virus (ApNMV) was identified in crabapple trees with mosaic symptoms from Zaozhuang, Shandong Province, China, by reverse transcription polymerase chain reaction (RT-PCR) analysis.  The complete nucleotide sequences of one isolate from crabapple (ApNMV-Hai) and two isolates from apple (ApNMV-Hua and -Qu) were determined.  The sizes of genomic RNA1, 2 and 3 of the three isolates differed from those of the previously reported isolate ApNMV-P126 from Japanese apple, especially RNA3.  Compared with the nucleotide (nt) sequence of RNA3 in isolate P126, those in the Hai and Qu isolates were 7 and 33 nt shorter, respectively, and that of isolate Hua was 7 nt longer.  Alignment analyses showed that these differences in size were mainly due to differences in the lengths of the 5´ untranslated region (UTR) and the UTR region between the ORFs encoding the movement protein and the coat protein.  In the phylogenetic trees constructed using the full genomic sequences of RNA1, 2 and 3, the isolate Hai clustered into a group with the isolate Qu in the RNA1 tree, but formed an individual branch in the RNA2 and 3 trees.  Three recombination events were identified in the nucleotide sequences of RNA1 and 2 among the isolates ApNMV-Hai, -Hua, and -Qu.  This is the first report of the full genome sequence of ApNMV in crabapple.
 

Key words: crabapple ,  mosaic symptom ,  Apple necrotic mosaic virus ,  molecular characterization