Устойчивость к фитофторозу некоторых перспективных линий диких Lycopersicon hirsutumстатья

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[1] Устойчивость к фитофторозу некоторых перспективных линий диких lycopersicon hirsutum / Т. И. Уланова, С. Н. Еланский, А. В. Филиппов и др. // Журнал российского фитопатологического общества. — 2003. — № 4. — С. 9–15. Several specimens of Lycopersicon hirsutum were tested on the resistance to late blight in laboratory and under the field conditions in the Moscow region. Strains of Phytophthora infestans were isolated from neighbored potato, tomato and L. hirsutum plots of tested field. Blighted samples of L. hirsutum leaves were assessed on the presence of oospores. Comparative analysis of P. infestans isolates from field patches of potato, tomato, and L. hirsutum did not reveal the significant differences between them. According to the host membership in all groups of isolates both mating types, complex potato races, and predomination of tomato race T1 were detected. Average number of virulence gene was 8.5 for isolates from L. hirsutum, and 8.7 for isolates from tomato and potato (virulence to 10 resistance gene were tested). The aggressiveness to the tissue of potato tubers of mixture of isolates collected from L. hirsutum was a little higher than for the mixture from potato, but significantly lower than for mixture of isolates from tomatoes. At inoculation of potato cultivars with mixture of isolates from tomato the differences between cultivars with preliminary reported different levels of field resistance was low. Isolates from tomato were the most aggressive to L. hirsutum under the laboratory conditions testing. Oospores were found in blighted leaves of four lines of L. hirsutum. The percentage of the samples with oospores was comparative with this in the leaves of potato and tomatoes. Tested specimens have a high level of resistance to late blight, but they were strongly delayed in phenophases relatively to the tomatoes. Thus, these tested specimens can be recommended as donors of resistance to late blight only for indoor tomatoes because in the greenhouse it is possible to artificially elongate the vegetation season.

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