Abstract
Tomato spotted wilt virus (TSWV) is one of the most destructive diseases affecting tomato (Solanum lycopersicum) cultivation and production worldwide. As defenses against TSWV, natural resistance genes have been identified in tomato, including Sw-1a, Sw-1b, sw-2, sw-3, sw-4, Sw-5, Sw-6, and Sw-7. However, only Sw-5 exhibits a high level of resistance to the TSWV. Thus, it has been cloned and widely used in the breeding of tomato with resistance to the disease. Due to the global spread of TSWV, resistance induced by Sw-5 decreases over time and can be overcome or broken by a high concentration of TSWV. How to utilize other resistance genes and identify novel resistance resources are key approaches for breeding tomato with resistance to TSWV. In this review, the characteristics of natural resistance genes, natural resistance resources, molecular markers for assisted selection, and methods for evaluating resistance to TSWV are summarized. The aim is to provide a theoretical basis for identifying, utilizing resistance genes, and developing tomato varieties that are resistant to TSWV.
Highlights
Tomato (Solanum lycopersicum) is one of the most important economic vegetable crops.As a major producer and exporter of tomato products the worldwide, China has over one million hectares of harvested area and a total tomato production of ~63 million tonnes in2019
The viral small interfering RNAs profiles derived from the Tomato spotted wilt virus (TSWV) genome in an infected tomato were analyzed
From TSWV-susceptible cultivars can be transformed through fixed-site precise editing with clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPRassociated protein-9 nuclease (Cas9), and Sw-5b-mediated TSWV resistance should be reintroduced for the enhancement of tomato resistance to the TSWV
Summary
Tomato (Solanum lycopersicum) is one of the most important economic vegetable crops. As a major producer and exporter of tomato products the worldwide, China has over one million hectares of harvested area and a total tomato production of ~63 million tonnes in. M RNA is a sense RNA encoding viral non-structural proteins (NSm) and mainly promotes TSWV infection [11]. 2021, 22, 10978 viral non-structural proteins (NSm) and mainly promotes TSWV infection [11]. TSWV reduces areas andareas the marketable value of tomato causes the death of tomato plants [25,26]. Numerous tomato plants (such as those that carry the Sw-5 gene) resistant have been screened, and many excellent reviews on the different aspects of biology, to the TSWV have been screened, and many excellent reviews on the different aspects of thrips vector-mediated transmission, resistance strategies, and plants’. The aim is to provide a basis for exploring genes involved in resistance against the research onfor disease resistance breeding in tomato.
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