Chromosomal Polymorphism in Sweet Potato Weevil, Cylas formicarius

Abstract

Karyotype and sex-determining system of Cylas formicarius from Louisiana were determined as 10AA+XX in females, and 10AA+XY in most males with a few individuals exhibited both XY and Xyy_p karyotypes. The culture from Hawaii had only Xy_p males, those from Guam, Tinian and Taiwan were mostly Xy_p although some were Xyy_p and a few had both the Xyy_p and Xy_p karyotypes in the same individual.