Table 1. Estimated heritabilities for survival and viral load in challenged populations.

Trait	Method	Heritability (s.e)
Survival	Observed binary scale (G)	0.078 (0.037)
	Underlying liability scale (G)	0.168
	Observed binary scale (P)	0.13 (0.058)
	Underlying liability scale (P)	0.25
Viral load	Log transformed viral load(G)	0.127 (0.05)
	Log transformed viral load (P)	0.19 (0.08)