Evaluation of some processing tomato lines with resistance to Tomato spotted wilt virus for agricultural and processing characters

Abstract

Nowadays, Tomato spotted wilt virus (TSWV) is one of the most limiting factors for tomato culture in Spain. Some breeding programs have been recently developed to obtain cultivars with resistance to TSWV. The evaluation of six lines of processing tomato obtained from one of these breeding programs and carrying the Sw-5 gene that confers resistance to TSWV, has shown that all these lines have both agronomic (yield, vigor, etc.) and quality characters better or similar to those of control cultivars. The lines tested here could be very useful in regions where TSWV is an endemic disease and to get hybrids that would express heterosis and more stability in different environmental conditions.

Estimation of the effect of Tomato spotted wilt virus (TSWV) infection on some yield components of tomato

“…The economic impact of TSWV is great, due to its wide geographical distribution and to its broad host range. Crops in which important losses due to TSWV have been reported are tomato, pepper, lettuce, eggplant, papaya, French beans, celery and ornamental plants (Gragera et al 2003;Rosello et al 1996). Infection rates of 30-100% lead to major losses in commercial vegetable crops.…”

Tomato breeding for resistance to Tomato spotted wilt virus (TSWV): an overview of conventional and molecular approaches

“…It is requested that all resistant or tolerant tomato cultivars will have high yielding ability and desirable quality characters. Gragera et al (2003) found that six tomato lines carrying the Sw-5 gene (originating from one of the previous breeding programmes) had both agronomic and quality characters better or as good as control cultivars. Such lines or cultivars can be very useful for the development of hybrids that would express heterosis and stability in different environmental conditions, particularly in regions where TSWV is an endemic disease.…”