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Journal of Heredity Advance Access published online on October 3, 2008
Journal of Heredity, doi:10.1093/jhered/esn082
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© The American Genetic Association. 2008. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Mendelian Inheritance of Pupal Diapause in the Flesh Fly, Sarcophaga bullata

Bing Han, and David L. Denlinger

From the Department of Entomology, The Ohio State University, 318 West 12th Avenue, Columbus, OH 43210

Address correspondence to David L. Denlinger at the address above, or e-mail: denlinger.1{at}osu.edu.

Pupal diapause (dormancy) in the flesh fly, Sarcophaga bullata, is induced by short-day photoperiods and low temperature. In this study, the inheritance mode of diapause was investigated by crossing a nondiapausing (nd) strain of S. bullata with 2 diapausing strains having different diapause capacities. The results consistently indicated that diapause incidence is inherited in a simple Mendelian pattern, thus a single gene or a small gene cluster linked to the photoperiodic clock controls the seasonal response of diapause. The fact that the nd strain lacked daily rhythmicity in adult eclosion and showed altered expression of 2 circadian clock genes suggests that the photoperiodic and circadian clocks are related through a shared molecular component in S. bullata.

Key Words: circadian clock • diapause • Mendelian inheritance • photoperiodic response

Corresponding Editor: James Thompson

Received May 12, 2008
Revised August 10, 2008
Accepted September 5, 2008


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