抄録
The present paper deals with the host-range mutation in T2 bacteriophage and some new linkage relationships among genetic markers controlling the host-specificity and the plaque-types are described.
The mutation rate of T2hc (phenotype hc) was about 10-7, and that of T2ht (phenotype ht) was about 10-4-10-5.
Crosses between any pairs of independently arising 10 hc-mutants have failed to yield recombinant, indicating that the hc-mutation tend to occur at a single genetic locus.
However, recombination experiments between a T2ht-mutant and any one of the T2hc-mutants have shown that these two mutants may occur at least two different loci, respectively.
