TABLE 1.

Occurrence of derived phenotypes used to estimate rates of recombination and point mutations^a

Primary strain (Sucs, Kanr)	Implied change	Resulting phenotype	Expt	rm	Dilution factor (s)	λmed	Population size
BSV1	Recombination	Sucr, Kans	a	41	0.030	180	3.76 × 1010
	Point mutation	Sucr, Kanr	a	523	0.030	1,720	3.76 × 1010
	Recombination	Sucr, Kans	b	20	0.004	562	1.20 × 1011
	Point mutation	Sucr, Kanr	b	424	0.004	8,879	1.20 × 1011
BSV2	Point mutation	Sucr, Kanr	a	447	0.030	1,493	2.91 × 1010

^aPrimary strain phenotype (sucrose sensitive, Suc^s; kanamycin resistant, Kan^r), recombination phenotype (sucrose resistant, Suc^r; kanamycin sensitive, Kan^s), or point mutation phenotype (sucrose resistant, Suc^r; kanamycin resistant, Kan^r). Measurements of the rate of recombination and point mutations at different loci were conducted in two independent, replicate experiments, a and b. r_m, median number of recombinants or mutants per culture. λ_med, median number of recombination events or mutation events per culture.