Sex differences in the genetic architecture of lifespan in a seed beetle: extreme inbreeding extends male lifespan

Table 3 Second assay of sex-specific effects of inbreeding level on lifespan and ageing.

Source Statistic	DF/Variance	DFDen/Standard Error	F-ratio/Z-value	P-value
Lifespan
Inbreeding	1	39	0.03	0.8537
Sex	1	29.8	5.33	0.0281
Inbreeding × Sex	1	29.7	8.84	0.0058
Density	1	29.5	0.00	0.9568
Line	0.2187	0.2770	0.79	0.2149
Mortality rates, females
Baseline mortality (ln α)
Inbreeding	1	14.7	4.87	0.0436
Density	1	18.8	1.98	0.1754
Line	0.4913	0.7436	0.66	0.2544
Rate-of-senescence (β)
Inbreeding	1	16	0.64	0.4353
Density	1	16	0.11	0.7432
Baseline mortality (ln α)	1	14.5	15.44	0.0014
Late-life deceleration (s)	1	16.8	37.73	< 0.0001
Line	0.02133	0.01651	1.29	0.0982
Late-life deceleration (s)
Inbreeding	1	10.9	9.33	0.0111
Density	1	11.3	1.57	0.2359
Baseline mortality (ln α)	1	11.1	8.15	0.0156
Rate-of-senescence (β)	1	11.6	45.45	< 0.0001
Line	0.4392	0.2349	1.87	0.0307
Mortality rates, males
Baseline mortality (ln α)
Inbreeding	1	16.8	2.51	0.1317
Density	1	17	0.18	0.6798
Line	0.2118	0.4854	0.44	0.3313
Rate-of-senescence (β)
Inbreeding	1	16.5	0.04	0.8474
Density	1	17.6	0.51	0.4854
Baseline mortality (ln α)	1	17.3	30.98	< 0.0001
Line	0.002670	0.002788	0.96	0.1691

Data was analysed with a General Linear Mixed Model with a REML estimation procedure. Degrees of freedom (DF & DFDen), F-ratios and P-values are provided for fixed effects (Inbreeding, Sex, Inbreeding × Sex and Density); variance components, standard errors, Z-values and P-values are provided for the random factor (maternal line). The analysis of mortality rates is presented separately for males (Gompertz model) and females (Logistic model) (see text for details).

ISSN: 2730-7182