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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (1): 141-147.doi: 10.16420/j.issn.0513-353x.2020-1087

• Research Notes • Previous Articles     Next Articles

Molecular Detection and Genetic Evolution Analysis of Yunnan Isolates of Lettuce Chlorosis Virus in Tomato

FENG Lixiao1, HU Rong1, BU Shan1, ZHANG Deyong1,2, LUO Xiangwen2, LI Fan3, DING Ming4, ZHANG Zhuo2, ZHANG Songbai1,2,*(), LIU Yong1,2,*()   

  1. 1College of Longping,Graduate School of Hunan University,Changsha 410125,China
    2Plant Protection Institute,Hunan Academy of Agricultural Sciences,Changsha 410125,China
    3Plant Protection College Yunnan Agricultural University,Kunming 650201,China
    4Yunnan Academy of Agricultural Sciences,Kunming 650231,China
  • Received:2021-03-09 Revised:2021-08-20 Online:2022-01-25 Published:2022-01-24
  • Contact: ZHANG Songbai,LIU Yong E-mail:zsongb@hunaas.cn;haoasliu@hunaas.cn

Abstract:

The 77 tomato leaves suspected to be infected by lettuce chlorosis virus(LCV)were sampled in Yunnan Province,China. The reverse transcriptional(RT)-PCR amplified near full length of minor coat protein gene(CPm)of LCV,which was sequenced by Sanger sequencing method. The genetic evolution was analyzed based on the sequences of near full length CPm genes. The results showed that the specific 1.38 kb fragment was amplified by RT-PCR,and 12.99% LCV-positive samples were detected in the 77 tomato leaf samples. The sequences of near full length CPm genes of Yunnan Province,China,shared the highest nucleotide sequence identity of 99.27%-99.78% with LCV Shandong isolate(MK370741). Phylogenetic analysis indicated that all of LCV isolates were divided into three subclusters with region-dependent,LCV Yunnan isolates grouped into same subcluster with other LCV isolates of China,and America isolates and European isolates grouped into other two subclusters separately. Genetic evolution analysis revealed one recombinant event exiting in LCV Yunnan isolate YN58,and the highest nucleotide substitution of 25.25 occurring in pyrimidine C/T,which shown LCV had the tendency of independent evolution and expedited diffusion in China. This is the first report of LCV in Yunnan Province.

Key words: tomaoto, lettuce chlorosis virus, molecular detection, phylogenetic analysis, evolution

CLC Number: