title: Four decades of inversion polymorphism in Drosophila pseudoobscura.
abstract: We report data that continue the studies of Dobzhansky and others on the frequencies of third-chromosome inversions in natural populations of Drosophila pseudoobscura in North America. The common gene arrangements continue to be present in frequencies similar to those described four decades ago, and the broad geographic patterns also remain unchanged. There is only one pronounced trend over time: the increase in frequency of the Tree Line inversion in Pacific coast populations.
authors.affiliation: Department of Genetics, University of Georgia, Athens 30602.
authors.forename: W W
authors.initials: WW
authors.lastname: Anderson
authors.forename: J
authors.initials: J
authors.lastname: Arnold
authors.forename: D G
authors.initials: DG
authors.lastname: Baldwin
authors.forename: A T
authors.initials: AT
authors.lastname: Beckenbach
authors.forename: C J
authors.initials: CJ
authors.lastname: Brown
authors.forename: S H
authors.initials: SH
authors.lastname: Bryant
authors.forename: J A
authors.initials: JA
authors.lastname: Coyne
authors.forename: L G
authors.initials: LG
authors.lastname: Harshman
authors.forename: W B
authors.initials: WB
authors.lastname: Heed
authors.forename: D E
authors.initials: DE
authors.lastname: Jeffery
mesh_terms: D000818:Animals; D007446:Chromosome Inversion; D002874:Chromosome Mapping; D003710:Demography; D004330:Drosophila / Q000235:genetics* / Q000302:isolation & purification; D005787:Gene Frequency; D014644:Genetic Variation; D011110:Polymorphism, Genetic; D014481:United States