Baliraine F N, Bonizzoni M, Guglielmino C R, Osir E O, Lux S A, Mulaa F J, Gomulski L M, Zheng L, Quilici S, Gasperi G, Malacrida A R
International Centre of Insect Physiology and Ecology, and Department of Biochemistry, University of Nairobi, Kenya.
Mol Ecol. 2004 Mar;13(3):683-95. doi: 10.1046/j.1365-294x.2004.02105.x.
A set of 10 microsatellite markers was used to survey the levels of genetic variability and to analyse the genetic aspects of the population dynamics of two potentially invasive pest fruit fly species, Ceratitis rosa and C. fasciventris, in Africa. The loci were derived from the closely related species, C. capitata. The degree of microsatellite polymorphism in C. rosa and C. fasciventris was extensive and comparable to that of C. capitata. In C. rosa, the evolution of microsatellite polymorphism in its distribution area reflects the colonization history of this species. The mainland populations are more polymorphic than the island populations. Low levels of differentiation were found within the Africa mainland area, while greater levels of differentiation affect the islands. Ceratitis fasciventris is a central-east African species. The microsatellite data over the Uganda/Kenya spatial scale suggest a recent expansion and possibly continuing gene flow within this area. The microsatellite variability data from C. rosa and C. fasciventris, together with those of C. capitata, support the hypothesis of an east African origin of the Ceratitis spp.
使用一组10个微卫星标记来调查非洲两种具有潜在入侵性的害虫果蝇物种——蔷薇果实蝇（Ceratitis rosa）和束腹果实蝇（C. fasciventris）的遗传变异水平，并分析其种群动态的遗传特征。这些基因座来自密切相关的物种——地中海实蝇（C. capitata）。蔷薇果实蝇和束腹果实蝇的微卫星多态性程度很高，与地中海实蝇相当。在蔷薇果实蝇中，其分布区域内微卫星多态性的演变反映了该物种的定殖历史。大陆种群比岛屿种群具有更高的多态性。在非洲大陆地区内发现的分化水平较低，而岛屿受到的分化影响更大。束腹果实蝇是一种分布于非洲中东部的物种。乌干达/肯尼亚空间尺度上的微卫星数据表明该区域近期有扩张，并且可能存在持续的基因流动。蔷薇果实蝇和束腹果实蝇的微卫星变异数据，以及地中海实蝇的数据，支持了果实蝇属起源于东非的假说。
