Tomato advanced lines, obtained in the IAC breeding program, were recently evaluated, under different Brazilian states producing areas to tospovirus reaction, fruit yield and soluble solid contents. In the growing season 95/96, IAC S4-3, IAC S4-4, IAC S4-13 and IAC S4-17, behaved as tospovirus resistant in Campinas, State of São Paulo, and Petrolina, State of Pernambuco; IAC S4-17, in the last site, showed productivity levels similar to that of AG-45, which is highly productive but susceptible to the disease. During the growing season 96/97, evaluation carried out under greenhouse conditions, in Campinas, showed that the ten selections above mentioned lines presented higher levels of Tospovirus resistance as compared to other tomato lines derived from different resistance sources. Nine new lines selected within the IAC S4-group were tested under field trials (Campinas), during the growing season 97/98, and compared to cultivars Colosso (SVS), Stevens and IPA-6 and four SVS lines. Tospovirus infection levels varied from 8.6% (IAC S4-4-16G) to 100% (IPA-6), with cultivars Stevens and Colosso reaching 31.7% and 70.3%, respectively. Also in 97, under field conditions in Patos de Minas, State of Minas Gerais, tomato lines IAC S4-3-10 and IAC S4-3-18H presented soluble solid contents similar to that of AG-45, considered outstanding for the character. They also showed higher fruit yields than cultivars AG-45 and IPA-5, although showing excessively late flowering and fruit maturing cycles.
Lycopersicon spp.; virus resistance
