Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (10): 2416-2425.DOI: 10.3969/j.issn.1004-1524.20231156

• Review • Previous Articles     Next Articles

Research progress on resistance of pepper to Tomato spotted wilt virus (TSWV)

GUO Nana(), LI Wei, HUANG Lijuan, ZHANG Tao, WEI Bingqiang*()   

  1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2023-10-07 Online:2024-10-25 Published:2024-10-30

Abstract:

Tospovirus, the only genus of viruses within the Bunyaviridae family that can invade plants, poses a significant challenge to global agriculture. Its primary member, Tomato spotted wilt virus (TSWV), is particularly detrimental to the pepper industry. TSWV, a negative single-stranded RNA virus, is primarily transmitted through the persistent proliferation of thrips. Peppers frequently exhibit a range of complex symptoms, including leaf shedding, yellowing of new leaves, and necrosis at the growth point when infected with TSWV. In recent years, as bioinformatics research has advanced and the whole-genome sequencing of pepper has been completed, researchers have made significant progress in understanding the pathogenesis of TSWV and the mechanisms of resistance to TSWV in pepper plants. In terms of TSWV detection, PCR and RT-PCR technologies have been widely used for the precise detection of TSWV, especially the specific primers designed for the nuclear capsid protein gene (N-gene), which have significantly improved the detection efficiency and accuracy. Concurrently, molecular markers associated with resistance have been extensively applied for detecting and characterizing germplasm resources resistant to TSWV. The most effective strategy for preventing and controlling TSWV is to develop disease-resistant varieties. New varieties of resistant to TSWV in pepper such as ‘Zhongjiao 115’ have been successfully cultivated via extensive screening of resistant germplasm resources at home and abroad, combined with molecular marker technology. In addition, the virus can effectively evade the plant defense system through immune evasion strategies, such as antigenic structural mutations or host immunosuppression, thereby increasing the challenge of prevention and control. So, future research needs to focus on the in-depth mining of resistance genetic resources, improvement of breeding technology system and discovery of novel resistance genes, in order to breed pepper varieties with broader and more durable resistance.

Key words: pepper, Tomato spotted wilt virus, germplasm innovation, resistance

CLC Number: