Km. Zhang et al., ISOLATES OF PHYTOPHTHORA-COLOCASIAE FROM HAINAN-ISLAND IN CHINA - EVIDENCE SUGGESTING AN ASIAN ORIGIN OF THIS SPECIES, Mycologia, 86(1), 1994, pp. 108-112
The 280 isolates of Phytophthora colocasiae obtained from Hainan Islan
d consisted of 136 A1, 102 A2 and 42 A0 mating types. The three mating
types tested were all pathogenic to taro leaves and similar in electr
ophoretic patterns of soluble proteins. The representative isolates te
sted showed considerable variation in growth response to temperature,
in ability to produce sporangia and in morphology of sporangia. Result
s suggest that Hainan Island is inside the center of origin of P. colo
casiae.