ABSTRACT
Maternally inherited variants, which arose within a laboratory colony of Culex pipiens fatigans, have been studied by rearing cultures from single egg rafts. Segregation, i.e, variation of cytoplasmic incompatibility properties between the male progeny of individual females, was demonstrated. Also, from the daughters of individual females, sub-lines were derived within which all the males showed the same incompatibility or compatibility properties. Among the descendants of tetracycline-treated individuals were lines which superficially simulated these phenomena, but theses lines ultimately reverted to the cytoplasmic compatibility type of the strain which was submitted to the treatment. The types of variation s in cytoplasmic incompatibility properties that have been studied are discussed.
Subject(s)
Culex/genetics , Extrachromosomal Inheritance/drug effects , Tetracycline/pharmacology , Animals , Crosses, Genetic , Culex/drug effects , Female , Humans , Infertility , MaleSubject(s)
Culex , Pest Control, Biological , Selection, Genetic , Age Factors , Animals , Female , MaleSubject(s)
Culex/genetics , Fertility , Mosquito Control , Translocation, Genetic/radiation effects , Animals , MaleSubject(s)
Culex/physiology , Mosquito Control , Reproduction , Animals , Evaluation Studies as Topic , Female , MaleSubject(s)
Crosses, Genetic , Culex/genetics , Mosquito Control , Polymorphism, Genetic , Animals , Culex/cytology , Cytoplasm , Female , MaleABSTRACT
The cytoplasms of Paris and Delhi strains of Culex fatigans have been reported to be bi-directionally incompatible. However, in the present study it is shown that with increasing age males with Paris cytoplasm show an increasing degree of partial compatibility with Delhi females. A male history of previous mating seems a contributory effect in enhancing the degree of partial compatibility. The relevance of partial compatibility to genetic control of C. fatigans is discussed.
