Table 2. GSIs for life span and its micro-environmental variance (lnσ_ε) in the DGRP.

Trait	Parameter		Temperature
		18°C	25°C	28°C
Life span	rGMF	0.806	0.703	0.784
	σLF	20.51	9.47	6.41
	σLM	21.40	10.23	6.60
	σLFσLM(1−rGMF)	85.14	28.76	9.13
	(σLF−σLM)2/2	0.39	0.29	0.04
	% rank	99.5	99.0	99.6
Life span micro-environmental variance	rGMF	0.716	0.807	0.770
	σLF	0.280	0.265	0.282
	σLM	0.264	0.259	0.286
	σLFσLM(1−rGMF)	0.0210	0.0132	0.0185
	(σLF−σLM)2/2	0.0001	1.8 × 10-5	8.0 × 10-6
	% rank	99.5	99.9	100

r_GMF: cross-sex genetic correlation (${\sigma }_L^2/({\sigma }_L^2+{\sigma }_{LS}^2)$); σ_LF: female genetic standard deviation; σ_LM: male genetic standard deviation; % rank: contribution of changes in rank order of life span between males and females to sex-by-line interaction variance. All genetic components were significant at P < 0.0001.

Abbreviations: DGRP, D. melanogaster Genetic Reference Panel; GSI, genotype-by-sex interaction