The phenotypic distribution of esterase (EST) activity (measured colorimetrically) among individual flour beetles (Tribolium confusum Duv.) seems continuous, suggesting polygenic inheritance. Narrow-sense heritability esti- mates were around 0.45. A pilot, hierarchical crossing experiment indicated that the sire contributed significantly to the differences in EST activity among the offspring, while the dam (within sire) component was negligible. Family selection for high (H) EST activity & using the activity in the male parent as the criterion for selection & increased the population mean 8-fold in five generations. Selection for low (L) activity unexpectedly resulted in increased mean activity. Electrophoretic examination after termination of selection showed that one of five EST isozymes contributed most of the esterolytic activity in individual beetles. The increase in frequency of individuals carrying this high-activity isozyme in the H line was the reason for the increase of mean activity in that line. In L, most individu- als had a weak-staining isozyme instead. The allelic difference at one locus is translated into the observed continu- ous phenotypic variation in activity among individuals. Theoretical considerations of the pilot experiment suggest that, in addition to autosomal, Mendelian inheritance of the H allele, a negative, non-Mendelian cytoplasmic factor is involved in the inheritance of EST activity in T. confusum. This suggestion is supported by the opposite effect of male and female parents on offspring EST activity in the L line.
Bloch, G. and Wool, D. (1994): Methidathion resistance in the sweetpotato whitefly (Aleyrodidae, Homoptera) in Israel: Selection, heritability and correlated changes in esterase activity. J. Econ. Entomol.87:1147-1156.
'Methidathion resistance in the sweetpotato whitefly (Aleyrodidae, Homoptera) in Israel: Selection, heritability and correlated changes in esterase activity ' () 87 J. Econ. Entomol. : 1147 -1156 .
Bourguet, D. and Raymond, M. (1998): The molecular basis of dominance relationships: The case of some recent adaptive genes. J. Evol. Biol.11:103-122.
'The molecular basis of dominance relationships: The case of some recent adaptive genes ' () 11 J. Evol. Biol. : 103 -122 .
Brown, T. M. and Brogdon, W. G. (1987): Improved detection of insecticide resistance through conventional and molecular techniques. Annu. Rev. Entomol.32:145-162.
'Improved detection of insecticide resistance through conventional and molecular techniques ' () 32 Annu. Rev. Entomol. : 145 -162 .
Falconer, D. S. (1960): Introduction to Quantitative Genetics. Ronald Press, New York.
Introduction to Quantitative Genetics , ().
Van Asperen, K. (1962): A study of housefly esterases by means of a sensitive colorimetric method. J. Insect. Physiol.8:401-416.
'A study of housefly esterases by means of a sensitive colorimetric method ' () 8 J. Insect. Physiol. : 401 -416 .
Benkel, B. F. and Hickey, D. A. (1986): The interaction of genetic and environmental factors in the control of amylase gene expression in Drosophila melanogaster. Genetics114: 943-954.
'The interaction of genetic and environmental factors in the control of amylase gene expression in Drosophila melanogaster ' () 114 Genetics : 943 -954 .
Blackman, R. L., Devonshire, A. L. and Sawicki, R. M. (1977): Co-inheritance of increased carboxyl-esterase activity and resistance to organophosphorous insecticides in Myzus persicae (Sulzer). Pest. Sci.8:163-166.
'Co-inheritance of increased carboxyl-esterase activity and resistance to organophosphorous insecticides in Myzus persicae (Sulzer) ' () 8 Pest. Sci. : 163 -166 .
Bulfield, G., Moore, E. A. and Kacser, H. (1978): Genetic variation in activity of the enzymes of glycolysis and gluconeogenesis between inbred strains of mice. Genetics89:551-561.
'Genetic variation in activity of the enzymes of glycolysis and gluconeogenesis between inbred strains of mice ' () 89 Genetics : 551 -561 .
Clayton, G. A. and Robertson, A. (1957): An experimental check on quantitative genetical theory. II. The long-term effects of selection. J. Genet.55:152-170.
'An experimental check on quantitative genetical theory. II. The long-term effects of selection ' () 55 J. Genet. : 152 -170 .
Cohen, E., Sverdlov, E. and Wool, D. (1977): Expression of esterases during ontogenesis of the flour beetle, Tribolium castaneum (Tenebrionidae, Coleoptera). Biochem. Genet.15:253-264.
'Expression of esterases during ontogenesis of the flour beetle, Tribolium castaneum (Tenebrionidae, Coleoptera) ' () 15 Biochem. Genet. : 253 -264 .
Coyne, J. A. (1993): The genetics of an isolating mechanism between two species of Drosophila. Evolution47:778-788.
'The genetics of an isolating mechanism between two species of Drosophila ' () 47 Evolution : 778 -788 .
David, J. R., Bocquet, C., Arens, M. F. and Fouillet, P. (1976): Biological role of alcohol dehydrogenase in the tolerance of Drosophila melanogaster to aliphatic alcohols: Utilization of an ADH-null mutant. Biochem. Genet.14: 989-997.
'Biological role of alcohol dehydrogenase in the tolerance of Drosophila melanogaster to aliphatic alcohols: Utilization of an ADH-null mutant ' () 14 Biochem. Genet. : 989 -997 .
Bartlett, A. C., Bell, A. E. and Anderson, V. L. (1966): Changes in quantitative traits of Tribolium under irradiation and selection. Genetics54:699-713.
'Changes in quantitative traits of Tribolium under irradiation and selection ' () 54 Genetics : 699 -713 .
Bell, A. E. (1982): The Tribolium model in animal breeding research. Proceedings, 2nd world conference on genetics applied to livestock production. Madrid, Spain, pp. 26-42.
'The Tribolium model in animal breeding research ' , , .
Bell, A. E. and Moore, C. H. (1972): Reciprocal recurrent selection for pupal weight in Tribolium in comparison with conventional methods. Egypt. J. Genet. Cytol.1:92-119.
'Reciprocal recurrent selection for pupal weight in Tribolium in comparison with conventional methods ' () 1 Egypt. J. Genet. Cytol. : 92 -119 .
Laurie-Ahlberg, C. C., Wilton, A. N., Curtsinger, J. W. and Emigh, T. H. (1982): Naturally occurring enzyme activity variation in Drosophila melanogaster. I. Sources of variation for 23 enzymes. Genetics102:191-206.
'Naturally occurring enzyme activity variation in Drosophila melanogaster. I. Sources of variation for 23 enzymes ' () 102 Genetics : 191 -206 .
Lowry, O. H., Rosebrough, N. J., Farr, A. L. and Randal, R. J. (1951): Protein measurement with the Folin-Phenol reagent. J. Biol. Chem.193:265-275.
'Protein measurement with the Folin-Phenol reagent ' () 193 J. Biol. Chem. : 265 -275 .
Langley, C. H., Voelker, R. A., Leigh Brown, A. J., Ohnishi, S., Dickson, B. and Montgomery, E. (1981): Null allele frequencies at allozyme loci in natural populations of Drosophila melanogaster. Genetics 99:151-156.
'Null allele frequencies at allozyme loci in natural populations of Drosophila melanogaster ' () 99 Genetics : 151 -156 .
Laurie-Ahlberg, C. C., Maroni, G., Bewley, G. C., Lucchesi, J. C. and Weir, B. S. (1980): Quantitative genetic variation of enzyme activities in natural population of Drosophila melanogaster. Proc. Natl. Acad. Sci. USA77: 1073-1077.
'Quantitative genetic variation of enzyme activities in natural population of Drosophila melanogaster ' () 77 Proc. Natl. Acad. Sci. USA : 1073 -1077 .
David, J. R., Daly, K. and Van Herrewege, J. (1984): Acetaldehyde utilization and toxicity in Drosophila adults lacking alcohol dehydrogenase or aldehyde oxidase. Biochem. Genet.22:1015-1029.
'Acetaldehyde utilization and toxicity in Drosophila adults lacking alcohol dehydrogenase or aldehyde oxidase ' () 22 Biochem. Genet. : 1015 -1029 .
Devonshire, A. L. and Field, L. M. (1991): Gene amplification and insecticide resistance. Annu. Rev. Entomol.36: 1-23.
'Gene amplification and insecticide resistance ' () 36 Annu. Rev. Entomol. : 1 -23 .
Devonshire, A. L. and Moores, G. D. (1982): A carboxylesterase with broad substrate specificity causes organophosphorous, carbamate and pyrethroid resistance in peach-potato aphids (Myzus persicae). Pest. Biochem. Physiol.18:235-346.
'A carboxylesterase with broad substrate specificity causes organophosphorous, carbamate and pyrethroid resistance in peach-potato aphids (Myzus persicae) ' () 18 Pest. Biochem. Physiol. : 235 -346 .
Englert, D. C. and Bell, A. E. (1970): Selection for time of pupation in Tribolium castaneum. Genetics64:541-552.
'Selection for time of pupation in Tribolium castaneum ' () 64 Genetics : 541 -552 .
Georghiou, G. P. and Pasteur, N. (1980): Organophosphate resistance and esterase pattern in a natural population of the southern house mosquito from California. J. Econ. Entomol.73:489-492.
'Organophosphate resistance and esterase pattern in a natural population of the southern house mosquito from California ' () 73 J. Econ. Entomol. : 489 -492 .
Georghiou, G. P., Pasteur, N. and Hawley, M. K. (1980): Linkage relationships between organophosphate resistance and a highly active esterase B in Culex quinquefasciatus from California. J. Econ. Entomol.73:301-305.
'Linkage relationships between organophosphate resistance and a highly active esterase B in Culex quinquefasciatus from California ' () 73 J. Econ. Entomol. : 301 -305 .
Hardin, R. and Bell, A. E. (1967): Two-way selection for body weight in Tribolium on two levels of nutrition. Genet. Res.9:309-330.
'Two-way selection for body weight in Tribolium on two levels of nutrition ' () 9 Genet. Res. : 309 -330 .
Hartl, D. L. and Clark, A. G. (1989): Principles of Population Genetics. Sinauer, Sunderland, Massachusetts.
Principles of Population Genetics , ().
Hickey, D. A. (1981): Regulation of amylase activity in Drosophila melanogaster: Variation in the number of enzyme molecules produced by different amylase genotypes. Biochem. Genet.19:783-796.
'Regulation of amylase activity in Drosophila melanogaster: Variation in the number of enzyme molecules produced by different amylase genotypes ' () 19 Biochem. Genet. : 783 -796 .
Kacser, H. and Burns, J. A. (1981): The molecular basis of dominance. Genetics97:639-666.
'The molecular basis of dominance ' () 97 Genetics : 639 -666 .
Kirkpatrick, M. and Lande, R. (1989): The evolution of maternal characters. Evolution43:485-503.
'The evolution of maternal characters ' () 43 Evolution : 485 -503 .
Lande, R. (1981): The minimum number of genes contributing to quantitative variation between and within populations. Genetics 99:541-553.
'The minimum number of genes contributing to quantitative variation between and within populations ' () 99 Genetics : 541 -53 .
Vardell, H. H. and Brower, J. H. (1975): Extra large Tribolium confusum: a new autosomal recessive mutant. Can. J. Genet. Cytol.17:609-613.
'Extra large Tribolium confusum: a new autosomal recessive mutant ' () 17 Can. J. Genet. Cytol. : 609 -613 .
Wade, M. J. and Stevens, L. (1985): Microorganisms mediated reproductive isolation in flour beetles (genus Tribolium). Science227:527-528.
'Microorganisms mediated reproductive isolation in flour beetles (genus Tribolium) ' () 227 Science : 527 -528 .
Wool, D. (1982): Critical examination of postulated cladistic relationships among species of flour beetles (Tribolium, Tenebrionidae, Coleoptera). Biochem. Genet.20:333-349.
'Critical examination of postulated cladistic relationships among species of flour beetles (Tribolium, Tenebrionidae, Coleoptera) ' () 20 Biochem. Genet. : 333 -349 .
Zera, A. J., Sanger, T. and Cisper, G. L. (1998): Direct and correlated response to selection on the JHE activity in adult and juvenile Gryllus assimilis: Implications for stage-specific evolution of insect endocrine systems. Heredity80: 300-309.
'Direct and correlated response to selection on the JHE activity in adult and juvenile Gryllus assimilis: Implications for stage-specific evolution of insect endocrine systems ' () 80 Heredity : 300 -309 .
Zera, A. J. and Zhang, C. (1995): Evolutionary endocrinology of juvenile hormone esterase in Gryllus assimilis: Direct and correlated response to selection. Genetics141:1125-1134.
'Evolutionary endocrinology of juvenile hormone esterase in Gryllus assimilis: Direct and correlated response to selection ' () 141 Genetics : 1125 -1134 .
McNew, R. W. and Bell, A. E. (1974): Crossbred response from purebred selection: An experimental check on selection theory with Tribolium. Theor. Appl. Genet.44: 100-105.
'Crossbred response from purebred selection: An experimental check on selection theory with Tribolium ' () 44 Theor. Appl. Genet. : 100 -105 .
Middleton, R. J. and Kacser, H. (1983): Enzyme variation, metabolic flux and fitness: Alcohol dehydrogenase in Drosophila melanogaster. Genetics105:633-650.
'Enzyme variation, metabolic flux and fitness: Alcohol dehydrogenase in Drosophila melanogaster ' () 105 Genetics : 633 -650 .
Miyashita, N., Laurie-Ahlberg, C. C., Wilton, A. N. and Emigh, T. H. (1986): Quantitative analysis of x chromosome effects on the activities of the glucose-6-phosphate and 6-phosphogluconate dehydrogenases of Drosophila melanogaster. Genetics113:321-335.
'Quantitative analysis of x chromosome effects on the activities of the glucose-6-phosphate and 6-phosphogluconate dehydrogenases of Drosophila melanogaster ' () 113 Genetics : 321 -335 .
Narang, S., Terranova, A. C., McDonald, I. C. and Leopold, R. A. (1976): Esterases in the housefly: Polymorphisms and inheritance patterns. J. Hered.67:30-38.
'Esterases in the housefly: Polymorphisms and inheritance patterns. J ' () 67 Hered. : 30 -38 .
Orozco, F. and Bell, A. E. (1974): Reciprocal recurrent selection compared to within-strain selection for increasing rate of egg lay of Tribolium under optimal and stress conditions. Genetics77:143-161.
'Reciprocal recurrent selection compared to within-strain selection for increasing rate of egg lay of Tribolium under optimal and stress conditions ' () 77 Genetics : 143 -161 .
Packard, G. C. and Boardman, T. J. (1988): The misuse of ratios, indices and percentages in ecophysiological research. Physiol. Zool.61:1-9.
'The misuse of ratios, indices and percentages in ecophysiological research ' () 61 Physiol. Zool. : 1 -9 .
Park, T. (1935): Studies on population physiology. IV. Some physiological effects of conditioned flour upon Tribolium confusum DuVal and its populations. Physiol. Zool.8: 91-115.
'Studies on population physiology. IV. Some physiological effects of conditioned flour upon Tribolium confusum DuVal and its populations ' () 8 Physiol. Zool. : 91 -115 .
Scheinberg, E., Bell, A. E. and Anderson, V. L. (1967): Genetic gain in populations of Tribolium castaneum under uni-stage tandem selection and under restricted selection indices. Genetics55:69-90.
'Genetic gain in populations of Tribolium castaneum under uni-stage tandem selection and under restricted selection indices ' () 55 Genetics : 69 -90 .
Sokal, R. R. and Rohlf, F. J. (1995): Biometry. 3rd ed. Freeman, New York.
Biometry , ().
Sverdlov, E. and Wool, D. (1973): The effect of rearing Tribolium castaneum in used culture medium on the developmental time of the next generation. Ent. Exp. Appl.16: 550-556.
'The effect of rearing Tribolium castaneum in used culture medium on the developmental time of the next generation ' () 16 Ent. Exp. Appl. : 550 -556 .
Sverdlov, E., Wool, D. and Cohen, E. (1976): Esterase isozymes of some Tribolium strains. Tribolium Inf. Bull.19: 120-125.
'Esterase isozymes of some Tribolium strains ' () 19 Tribolium Inf. Bull. : 120 -125 .
Wool, D., Namir, Z. and Bergerson, O. (1986): Dietary regulation of amylase activity in flour beetles (Coleoptera, Tenebrionidae): Tribolium. Ann. Ent. Soc. Amer.79: 407-413.
'Dietary regulation of amylase activity in flour beetles (Coleoptera, Tenebrionidae): Tribolium ' () 79 Ann. Ent. Soc. Amer. : 407 -413 .
Wool, D. and Shirtz, E. (1984): Selection for high and low amylase activity in adult flour beetles (Tribolium confusum)(Coleoptera, Tenebrionidae). Genetica63:229-236.
'Selection for high and low amylase activity in adult flour beetles (Tribolium confusum)(Coleoptera, Tenebrionidae) ' () 63 Genetica : 229 -236 .
Yoo, B. H. (1980): Long-term selection for a quantitative character in large replicate populations of Drosophila mela-nogaster: I. Response to selection. Genet. Res.35:1-17.
'Long-term selection for a quantitative character in large replicate populations of Drosophila mela-nogaster: I. Response to selection ' () 35 Genet. Res. : 1 -17 .