Table 1. Statistics of the life-history traits of the inbred lines (F=0.875) and outbred lines (F=0).

Trait	Inbred			Outbred			X21	P-value
	Mean	s.e.	n	Mean	s.e.	n
Female maturity rate	0.62	0.06	45	0.79	0.04	58	28.7	<0.001
Male maturity rate	0.77	0.07	36	0.92	0.04	54	5.1	<0.05
Overall maturity rate	0.67	0.06	46	0.82	0.04	58	33.8	<0.001
Juvenile survival	0.86	0.03	46	0.85	0.03	60	0.7	0.39
Longevity	25.6	1.3	37	27.4	1.2	45	0.6	0.43
Oviposition rate	9.7	0.6	15	11.3	0.5	17	4.2a	<0.05

The sample size n refers to the number of independent lines.

^aF-value instead of X²-value.