Abstract
The sex chromosomes of Simulium erythrocephalum show a pattern of serial differentiation by the linkage of inversions to either X or Y. Two inversion systems, IL-A and IS-B+I+G are maintained in stable polymorphism with sex differences in frequency throughout southern England. These inversions are linked to the sex chromosomes such that males are more likely to be heterozygous. Heterozygosity and homozygosity for inversions IL-A and IS-B respectively seem to be associated with speed of larval development and are probably selected.
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Post, R. Sex chromosome evolution in Simulium erythrocephalum (Diptera: Simuliidae). Heredity 54, 149–158 (1985). https://doi.org/10.1038/hdy.1985.20
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DOI: https://doi.org/10.1038/hdy.1985.20
