Genetics of osteal plate polymorphism and microevolution of threespine stickleback (Gasterosteus aculeatus L.)

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Abstract
The results of genetical studies of osteal plate polymorphism of threespine stickleback Gasterosteus aculeatus reported to date (Munzing 1959; Hagen and Gilbertson 1973; Avise 1976) are discussed and proposed inheritance models are considered. Results of crosses between the morphs of G. aculeatus from the White Sea are presented. An attempt has been made by the author to devise a unifying model for the inheritance of plate morphs within the whole range of G. aculeatus. The role of polymorphism in the microevolutionary processes taking place within this complex species is discussed.