中国番茄晚疫病菌交配型及其分布研究

本文对中国番茄晚疫病菌交配型的发生和分布及病菌的生物学特性进行了研究,结果表明,我国主要番茄产区晚疫病菌以A1交配型为主,占总菌株数的96.02%;1999~2001年间从全国18个省市采集的201个番茄晚疫病菌株中,仅发现8个A2交配型菌株,分布于广西、云南、河北和福建;被测菌株在10%V8培养基上菌落生长均受到一定的限制,而在黑麦培养基上菌落的生长速度、产孢量有明显的差异,但菌落形态与交配型类型不相关。

MATING TYPES AND THEIR DISTRIBUTION OF PHYTOPHTHORA INFESTANS FROM TOMATO IN CHINA

The occurrence and distribution and the biological characteristics of mating types of Phytophthora infestans collected from tomato fields in China were first reported. The results showed that A1 was the main mating type in China, which covered 96.02% of the total isolates, and 8 isolates of A2 were detected in Guangxi, Yunnan, Hebei and Fujian among 201 isolates collected from 18 provinces in China. The growth of all isolates tested was inhibited on the plates of 10% V8 agar, but the growth rate and amount of sporangia produced showed significant variation on the plates of rye agar. Further research indicated the colony growth pattern was not related to the mating type of the isolates.