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Effectiveness of second mating for two incompatible types of the citrus red mite, Panonychus citri (McGregor)
Author(s) -
Takafuji Akio
Publication year - 1986
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02515539
Subject(s) - biology , mite , mating , acari , mating type , pear , zoology , botany , type (biology) , diapause , horticulture , ecology , genetics , gene , larva
Summary Two types of the citrus red mite, Panonychus citri (M.) occur in some pear orchards in the intermediate latitudal areas in Japan during a certain period of the year ( Takafuji and Morimoto , 1983): one is a diapausing type ( DP ) and the other a non‐diapausing type ( C ). These two types are incompatible: no adult females are produced from the crosses between them ( Takafuji and Fujimoto , 1985). In the present study, females of each type were doubly crossed, first with a male of the other type, and then with a male of the same type, to examine the effectiveness of the second mating. In the females of the DP type, the second mating with a male of the same type was almost totally ineffective. In contrast, for the females of the C type the effectiveness of the second mating depended on the durations of the first and second matings: the famles produced female offspring only when the duration of the first copulation with a male of the DP type was brief and the second copulation with a male of the C type lasted relatively long. The results suggested that if the two types coexist, the intercrossing between them will favour the C type over the DP type.