Occurrance of different Phytophthora infestans mating types in populations at the territory of Belarus since 2007 to 2012
Abstract
It was shown that in the period 2007 and 2009-2012 ratio of basic mating types A1:A2 for 367 isolates of Phytophthora infestans was close to 1:1 with a slight predominance of A2, and taking into account a rare type A1A2 also marked in this work total ratio A1:A2: A1A2 was 153 (41.7 %): 208 (56.7 %):6 (1.6 %). Both main types of sex were marked during all years of collecting in all regions of the country in most fields, indicating that they were fairly uniformly distributed in space and time. These data are an important indicator and the main condition for the possibility of occurrence of sexual reproduction in natural populations of P. infestans. It is noted significant differences in the ratios A1:A2 for potatoes and tomatoes isolates of pathogen. In the case of potato A2 was predominant type, as for tomato - A1 type. Furthermore it was revealed that the ratio of mating types within one field, and within the season vary substantially depending on the time of collection.
About the Authors
V. N. Victorovich
Belarusian State University
Belarus
Belarus
A. M. Khodosovskaya
Belarusian State University
Belarus
Belarus
A. N. Evtushenkov
Belarusian State University
Belarus
Belarus
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