Reference Report

Reference
Citation	Schug, M.D., Smith, S.G., Tozier-Pearce, A., McEvey, S.F. (2007). The genetic structure of Drosophila ananassae populations from Asia, Australia and Samoa. Genetics 175(3): 1429--1440. (Export to RIS)
FlyBase ID	FBrf0200163
Publication Type	Research paper
PubMed ID	17237518
PubMed Abstract	Information about genetic structure and historical demography of natural populations is central to understanding how natural selection changes genomes. Drosophila ananassae is a widespread species occurring in geographically isolated or partially isolated populations and provides a unique opportunity to investigate population structure and molecular variation. We assayed microsatellite repeat-length variation among 13 populations of D. ananassae to assess the level of structure among the populations and to make inferences about their ancestry and historic biogeography. High levels of genetic structure are apparent among all populations, particularly in Australasia and the South Pacific, and patterns are consistent with the hypothesis that the ancestral populations are from Southeast Asia. Analysis of population structure and use of F-statistics and Bayesian analysis suggest that the range expansion of the species into the Pacific is complex, with multiple colonization events evident in some populations represented by lineages that show no evidence of recent admixture. The demographic patterns show isolation by distance among populations and population expansion within all populations. A morphologically distinct sister species, D. pallidosa, collected in Malololelei, Samoa, appears to be more closely related to some of the D. ananassae populations than many of the D. ananassae populations are to one another. The patterns of genotypic diversity suggest that many of the individuals that we sampled may be morphologically indistinguishable nascent species.
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Secondary IDs	FBrf0193180
Language of Publication	English
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Publication Type	Journal
Abbreviation	Genetics
Title	Genetics
Publication Year	1916-
ISBN/ISSN	0016-6731
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Genes (1)
	Dana\satDNA