Table 1.

Regression equations and numerical iteration values of fitness predicted from the three experiments from Mukai et al. (1972)

Experiment (Mukai et al., 1972)	Fitness model	Function from regression	R2	Predicted if U = 2.2
CH	Multiplicative	ln(w) = 0.0022−0.0280x	0·995	0·111
	Quadratic	ln(w) = 0.0014−0.0271x−0.0001x2	0·995	0·153
	Additive	w = 1−0.0255x	0·995	0·305
PQ	Multiplicative	ln(w) = 0.0022−0.0279x	0·993	0·111
	Quadratic	ln(w) = 0.0007−0.0245x−0.0005x2	0·995	0·210
	Additive	w = 0.9999−0.0254x	0·995	0·305
RT	Multiplicative	ln(w) = 0.0046−0.0420x	0·981	0·111
	Quadratic	ln(w) = 0.0037−0.0409x−0.0002x2	0·981	0·149
	Additive	w = 1−0.0366x	0·980	0·302

The three experiments are labeled CH, PQ and RT in Mukai et al. (1972) to represent the three initial fly stocks used to run the three separate mutation accumulation experiments. All values of R² and are approximated to three decimal places.