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J Virol. 1970 July; 6(1): 49-57
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Genetic Map of Bacteriophage

International Laboratory of Genetics and Biophysics (C.N.R.), Naples, Italy

ABSTRACT

Temperature-sensitive mutants of phage were obtained by means of various mutagens and assigned to 25 complementation groups. Temperature-sensitive mutants belonging to 21 complementation groups and a mutant giving turbid plaques were used to perform two- and three-factor crosses. Seventeen of the cistrons and the turbid mutant were shown to belong to the same linear linkage group, which showed no signs of circularity. The remaining four unlinked cistrons showed peculiarities in their recombination properties. Genes which are known to be expressed earlier apear to be grouped together in a terminal segment of the linkage group.

¹ On leave of absence from the Czechoslovak Academy of Sciences, Institute of Microbiology, Prague.

² Present address: University of California, Virus Laboratory, Berkeley, Calif. 94720.