title: The distribution of the P-M hybrid dysgenesis system in Drosophila melanogaster strains from Brazil.
abstract: Wild-caught flies of Drosophila melanogaster from seven natural populations of extreme regions of Brazil (São Luís, MA; Teresina, PI; Rio Cipó, MG; Maringá, PR; São José do Rio Preto, SP; Joinville, SC; and Porto Alegre, RS) were studied with the purpose of evaluating hybrid dysgenesis due to mobilization of P elements and the regulatory capacity of the strains' cytotypes. Diagnostic crosses were made and the strains classified according to their P-M phenotypes. Four strains were classified as moderate P (MA, MG, PI, and SP), two as Q (PR and RS) and one as M' (SC). Females of southern strains (PR, SC, and RS) presented in A crosses lower degrees of gonadal dysgenesis scores than those from northern strains (MA and PI).
authors.affiliation: Departamento de Ciências Biológicas-UNIVILLE, Joinville, SC, Brazil.
authors.forename: V C
authors.initials: VC
authors.lastname: Vetorazzi
authors.forename: M F
authors.initials: MF
authors.lastname: Lourenço
authors.forename: C M
authors.initials: CM
authors.lastname: Carareto
mesh_terms: D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D018740:Genetic Heterogeneity; D006059:Gonadal Dysgenesis / Q000235:genetics*; D008297:Male; D010641:Phenotype