Characteristics of the Phytophthora infestans population in Russiaстатья

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1. Полный текст Full text SpecialReport14_Web_phyt_popul.pdf 3,5 МБ 21 января 2017 [elansky]

[1] Characteristics of the phytophthora infestans population in russia / N. V. Statsyuk, M. A. Kuznetsova, I. N. Kozlovskaya et al. // Euroblight. PPO-Special Report. — Vol. 14. — PPO, Wageningen university Lelystad, The Netherland, 2010. — P. 247–254. A collection of 434 Phytophthora infestans isolates, obtained during 2007-2009 from potato and tomato fields of different parts of European Russia, has been assessed for several phenotypic and genotypic markers, including mtDNA haplotype, Pep1 and Pep2 loci, mating type, metalaxyl sensitivity, and the virulence. The comparison of phenotypic and genotypic characteristics of P. infestans population of the Moscow region in 2008-2009 with the similar data, obtained in 1997-1998, has shown significant changes occurred within a 10-year period: (1) the frequency ratio of Ia and IIa MtDNA haplotypes has shifted towards the predominance of the Ia type, (2) the percent of strains belonged to the A2 mating type has increased, (3) the virulence gene 9 has appeared in the current population, which now contains all 11 virulence genes, and (4) the percent of metalaxylsusceptible strains has significantly decreased from 78 to 58%. The analysis of the studied populations has shown that the Leningrad, Astrakhan, and Nizhni Novgorod populations are rather uniform, whereas the Moscow, Mariy El and Kostroma populations are characterized by a high diversity. The Astrakhan “tomato” population has a unique pattern of virulence gene frequencies and seems to be monoclonal.

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