Population genetics and gene variation in screwworms (Diptera: Calliphoridae) from Brazil | Zendy

David B. Taylor | Zendy; Richard D. Peterson | Zendy; Gonzalo E. Moya-Borja | Zendy

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Population genetics and gene variation in screwworms (Diptera: Calliphoridae) from Brazil

Author(s) -

David B. Taylor,

Richard D. Peterson,

Gonzalo E. Moya-Borja

Publication year - 1996

Publication title -

biochemical genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.519

H-Index - 41

eISSN - 1573-4927

pISSN - 0006-2928

DOI - 10.1007/bf02396241

Subject(s) - biology , calliphoridae , human genetics , genetics , evolutionary biology , population genetics , forensic entomology , variation (astronomy) , gene , population , genetic variation , ecology , demography , forensic science , physics , astrophysics , sociology , larva

Allozyme variation in New World screwworm, Cochliomyia hominivorax (Coquerel), populations from Brazil was examined. Variability was observed in 8 of 13 enzyme loci and the frequency of the most common allele was < 0.95 for seven loci. Observed and expected heterozygosities were 0.159 and 0.165, respectively. Comparisons of the Brazilian populations with previously studied populations from Costa Rica resulted in Nei's genetic distances of between 0.000 and 0.006, with the greatest distance being between populations within Brazil. Comparisons with Mexican populations using only three loci resulted in genetic distances < or = 0.031. Goodness-of-fit statistics for Hardy-Weinberg equilibrium and Wright's F statistics indicated small deviations from expected equilibrium genotype frequencies and low levels of differentiation between populations within Brazil. Differentiation among screwworm populations from Brazil, Costa Rica, and Mexico was minimal.

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