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从1969年到1985年17年期间测定了呼和浩特郊区所种植的马铃薯晚疫病菌生理小种成分。查明在晚疫病流行年毒力强的生理小种常常出现或出现比较早。在晚疫病发展受到抑制的年份,通常生理小种1;4和1.4占优势。马铃薯块茎晚疫病菌生理小种毒力和晚疫病流行有一定关系。我们查明在马铃薯混合种植时的晚疫病流行早的份,不同毒力的、生理小种在早熟易感品种块茎中越冬。我们结论是对于晚疫病菌复合生理小种出现来说与新的性基因存在没有必然关系。
From 1969 to 1985, 17 years, the composition of the physiological races of Phytophthora infestans planted in the suburbs of Hohhot was determined. Identify the late blight epidemic of virulence of the physical races often appear or appear earlier. In years when late blight development was suppressed, race 1 and 4 were dominant. There is a certain relationship between the physiological races of late blight of potato tubers and the epidemic of late blight. We identified the earlier parts of the late blight epidemic when mixed with potatoes and overwintered in tubers of early-maturing varieties with different virulence and physiological races. We conclude that there is no necessary relationship between the emergence of new sex genes and the emergence of a composite races of Phytophthora infestans.