Laboratory experiments on a change in genetic structure with an increase of population density in the citrus red mite population, Panonychus citri (McGregor) (Acari : Tetranychidae)
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概要
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A change in genetic structure with an increase of population density in Panonychus citri was analyzed by laboratory experiments focusing on the inbreeding coefficient (F) and spatial distribution. Genotype frequencies of an esterase locus, a-Estl , in F_1 females after mating in various population densities suggested that P. citri mated randomly. Adult females introduced to small citrus seedlings laid most eggs on the leaves on which they were set. The majority of immature offspring stayed on the leaves where they hatched. Females with different homo genotypes were introduced on leaves at the top and bottom of seedlings separately. The inbreeding coefficients of the developing populations were kept high for at least a month. A Iinear relationship was observed between mean density of adult females and F. From these results, we concluded that the aggregated egg production by adult females and low dispersion rate in the immature stages strongly restricts hybridization among breeding Patches of this secies.
- 日本応用動物昆虫学会の論文
- 1999-11-25
著者
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Osakabe M
National Agriculture Res. Center Ibaraki Jpn
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OSAKABE Mh.
National Agriculture Research Center
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Komazaki Shinkichi
Persimmon and Grape Research Center, National Institute of Fruit Tree Science
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Komazaki S
Department Of Grape And Persimmon Research National Institute Of Fruit Tree Science
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- Occurrence and hybridization of two parasitoid wasps, Torymus sinensis Kamijo and T.beneficus Yasumatsu et Kamijo (Hymenoptera: Torymidae) in the Oki islands
- Laboratory experiments on a change in genetic structure with an increase of population density in the citrus red mite population, Panonychus citri (McGregor) (Acari : Tetranychidae)