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《Acta Entomologica Sinica》 2007-12
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Microsatellite polymorphism of Bactrocera dorsalis (Hendel) populations in China

LI Wei-Feng 1,2,YANG Lang3,TANG Kan4,ZENG Ling1,LIANG Guang-Wen 1,(1.Laboratory of Insect Ecology,South China Agricultural University,Guangzhou 510642,China;2.Guangxi Entry-Exit Inspection & Quarantine Bureau,Nanning 530028,China;3.Plant Protection Institute,Guangxi Academy of Agricultural Sciences,Nanning 30007,China;4.College of Life Sciences,Guangxi Normal University,Guilin,Guangxi 541004,China)  
The genetic diversity of 11 Bactrocera dorsalis(Hendel)populations consisting of 224 individuals collected from 9 provinces of South China,Vietnam and Thailand was investigated using simple sequence repeat(SSR)markers to study the genetic differentiation among populations.Total 48 alleles at nine loci were amplified,with average of 5.33 alleles each locus.A relatively high level of genetic diversity was revealed:P=94.45%,Nei's=0.4371,I=0.7870.A higher level of genetic differentiation was detected among populations with Nei's F-statistics,F_ st=0.2370 ?The differentiation in certain degree may result from geographical isolation and barriers to gene flow.UPGMA cluster analysis indicated that the 9 populations from China clustered in two clades,the Southern China clade and the South-western China clade.Populations from Fujian,Taiwan,Guangdong and Hainan gathered into the Southern China clade,while populations from Sichuan,Yunnan,Gaungxi,Guizhou and Hunan formed the South-western China clade.It was so inferred that the evolutionary processes of the populations of the Oriental fruit fly in China are influenced by two factors,i.e.,geographical divergence and gene flow by trade communication.
【Fund】: 国家科技支撑计划子课题(2006BAD08A14);; 国家质量监督检验检疫总局科研项目(2006IK223);; 广东省重大科技专项(2004A20401002)
【CateGory Index】: S433
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