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CHANGES IN PHYTOPHTHORA INFESTANS AGGRESSIVENESS AS A RESULT OF REPEATED REPRODUCTION ON DIFFERENT POTATO CULTIVARSстатья
- Авторы: SPIGLAZOVA S., KUZNETSOVA M., SMETANINA T., FILIPPOV A.
- Журнал: PPO-SPECIAL REPORT
- Номер: 15
- Год издания: 2012
- Издательство: Applied Plant Research
- Местоположение издательства: Wageningen, The Netherlands
- Первая страница: 225
- Последняя страница: 228
- Аннотация: The aim of our study was to determine the level of influence of the cultivar resistance on the aggressiveness of P. infestans isolates. We supposed that the long-term passing of P. infestans isolates on the same potato cultivars can result in the change of their aggressiveness level. Such possibility was quite possible according to the results of the study of the aggressiveness of P. infestans strains, collected in different geographic regions. It has been found that isolates, collected on the fields with a long-term cultivation of the same potato cultivar, are more aggressive than those from the fields with the rotation of cultivars. Possibly, a long-term cultivation of the same potato cultivar results in the selection of the most aggressive strains of a P. infestans population. The mass reproduction of the same strain makes the population to be monoclonal, i.e., the process of accumulation of a single strain type, optimal for the survival and development on the certain potato cultivar, takes place. This process reduces the biodiversity, necessary for this pathogen to survive in the changing environment. In this case the population accumulates pathogen forms, which evolution is directed to the increase of the aggressiveness level. http://130.226.173.223/euroblight/Workshop/2011StPetersburg/Proceedings/Page225-228_SvetlanaSpiglazova_web.pdf
- Добавил в систему: Кузнецова Мария Алексеевна