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SEGREGATION OF CYTOPLASMIC INCOMPATIBILITY PROPERTIES IN CULEX PIPIENS FATIGANS
Sarala K. Subbarao 1, B. S. Krishnamurthy 1, C. F. Curtis 1, T. Adak 1, and R. K. Chandrahas 1
1 WHO/ICMR Research Unit on Genetic Control of Mosquitos, New
Delhi, India
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 these lines ultimately reverted to the cytoplasmic compatibility type of the strain which was submitted to the treatment. The types of variations in cytoplasmic incompatibility properties that have been studied are discussed.
Submitted on April 12, 1976Revised on April 1, 1977
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