title: Heterosis in a wild strain of Drosophila polymorpha with a lethal closely linked to the major esterase locus.
abstract: A laboratory population derived from a single wild inseminated female has a lethal so closely linked to the major esterase locus that in 3 years of observations no crossover products have been detected. Linkage with a chromosome inversion was excluded by cytological analysis. The heterozygotes are superior to the homozygotes in egg-adult viability, egg-laying rate, and longevity. Electrophoretic analysis of larvae, pupae, and 2-h-old adults shows that the specific phase for the lethal effect in homozygotes is the pupal stage.
mesh_terms: D000818:Animals; D003433:Crosses, Genetic; D004330:Drosophila / Q000235:genetics*; D004592:Electrophoresis, Starch Gel; D004950:Esterases / Q000235:genetics*; D005260:Female; D005796:Genes; D005804:Genes, Lethal; D006823:Hybrid Vigor; D008297:Male; D011995:Recombination, Genetic
chemical_list: D004950:Esterases