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Cелекция штаммов Phytophtora infestans в бесполых генерацияхстатья
- Авторы: Лаврова О.И., Еланский С.Н., Дьяков Ю.Т.
- Журнал: Журнал российского фитопатологического общества
- Том: 4
- Год издания: 2003
- Первая страница: 1
- Последняя страница: 7
- Аннотация: Changes in aggressiveness of two P. infestans isolates collected from potato (tomato race Т0) and tomato (race Т1) were investigated at consecutive passages on leaves of potato and tomato. Aggressiveness of tested isolates increased during passages on leaves of both host-plants with the subsequent plateau effect. Artificial selection on the decrease of aggressiveness (at every passaging the least aggressive isolates were selected), as soon as selection on its increasing (the most aggressive isolates were selected) indicates the growth of aggressiveness in both cases. At selection on downturn of aggressiveness the plateau effect observed some later. Aggressiveness grows faster on leaves of the congenial host-plant (isolate from potato on potato leaves, from tomato - on tomato leaves). Comparison of initial and selected isolates on potato tuber tissue of three cultivars (Lina, Sante and Lugovskoi) also has shown increase in aggressiveness of isolates after passages. Zoosporangia stretched after passages. There was no changes in neutral markers (mating type, allozyme loci, haplotypes of mitochondrial DNA) and virulences to tomato resistance gene after passages that testifies the absence of reinoculation.
- Добавил в систему: Еланский Сергей Николаевич