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2012年49 No.5
Karyotype analysis of pollinating wasps (Hymenoptera: Agaonidae) of three Ficus species
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Key Words：pollinating fig wasps，chromosome，karyotype，karyotype asymmetry coefficients
Abstract：
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Metaphase chromosomes and karyotypes of Ceratosolen emarginatus Mayr ( Ficus auriculata Loureiro)，C． emarginatus Mayr (F． oligodon Miquel) and Ceratosolensp． (Ficussp． )were investigated and compared． The results show that these three species have a highly similar karyotype with a diploid number of 2n = 10 and all chromosomes largeand metacentric． The karyotype formula is 2n = 2X = 10= 10M． The karyotype is of the type 1A according to the criteria of Stebbins (1971)． A plot of two body dimensions indicates that Ceratosolensp． (Ficussp． ) is less asymmetrical thanC． emarginatus (F． auriculata) andC． emarginatus (F． oligodon)． In other words，C． emarginatus (F． auriculata) and
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C． emarginatus (F． oligodon) are a much more closely related than either species is to Ceratosolensp． (Ficussp． )． Moreover，a comparison of the karyotypes of Ceratosolen and Blastophaga indicates that chromosome number andmorphology can be used to distinguish these two genera． Likely scenarios for the evolution of the Ceratosolen karyotype arediscussed．