scholarly journals Selective Sweeps at the Organophosphorus Insecticide Resistance Locus, Rop-1, Have Affected Variation across and beyond the  -Esterase Gene Cluster in the Australian Sheep Blowfly, Lucilia cuprina

2011 ◽  
Vol 28 (6) ◽  
pp. 1835-1846 ◽  
Author(s):  
C. J. Rose ◽  
J. R. Chapman ◽  
S. D. G. Marshall ◽  
S. F. Lee ◽  
P. Batterham ◽  
...  
Genetics ◽  
1988 ◽  
Vol 120 (1) ◽  
pp. 213-220 ◽  
Author(s):  
J A McKenzie ◽  
G M Clarke

Abstract Genetic evidence suggests that the evolution of resistance to the insecticide diazinon in Lucilia cuprina initially produced an increase in asymmetry. At that time resistant flies were presumed to be at a selective disadvantage in the absence of diazinon. Subsequent evolution in natural populations selected modifiers to ameliorate these effects. The fitness and fluctuating asymmetry levels of resistant flies are currently similar to those of susceptibles. Previous genetic analyses have shown the fitness modifier to co-segregate with the region of chromosome III marked by the white eyes, w, locus, unlinked to the diazinon resistance locus, Rop-1, on chromosome IV. This study maps the asymmetry modifier to the same region, shows, as in the case of the fitness modifier, its effect to be dominant and presents data consistent with the fitness/asymmetry modifier being the same gene (gene complex). These results suggest changes in fluctuating asymmetry reflect changes in fitness.


1980 ◽  
Vol 33 (6) ◽  
pp. 725 ◽  
Author(s):  
MJ Whitten ◽  
JM Dearn ◽  
JA McKenzie

Eggs and larvae of L. cuprina were coIJected from natural fly strikes in a flock of Merino ewes in which sheep had been either treated with the insecticide dieldrin or left as controls. An analysis of gene and genotype frequencies of Rdl locus, which determines resistance to dieldrin, provides support for the existence of strong selection operating during larval development on sheep whose fleece contain insecticide residue. Resistance genotypes appear to be at a disadvantage both in the laboratory and in the insecticide-free environment of control sheep. There is no evidence that flies of different resistance status choose oviposition sites on the basis of the presence of dieldrin residues in the fleece.


1984 ◽  
Vol 37 (2) ◽  
pp. 45 ◽  
Author(s):  
JA McKenzie ◽  
MJ Whitten

Artificial strikes were initiated on sheep at different times after treatment with either diazinon (an organophosphorus compound) or lindane (an organochlorine compound).


Sign in / Sign up

Export Citation Format

Share Document