Certain Aspects of the Genetic Factors Involved in the Control of the Larval Diapause of the Pink Bollworm1

Abstract

Nondiapause as a genetic character in the pink bollworm, Pectinophora gossypiella (Saunders), was effectively selected. After 23 generations of mass selection the experimental population was 99.85% free of diapause. It was concluded that the nondiapause character was not in equilibrium in the eleventh generation of selection, that it is not sex-linked, and that temperature and photoperiod must stimulate diapause through the same or a very closely related genetic system.