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. 2016 Jan 6;116(3):338–347. doi: 10.1038/hdy.2015.112

Table 1. Direct effects of age, mitochondrial and nuclear genetic variation on introgression line for female fecundity (that is, daily rate of egg laying) and fertility, and male ejaculate weight.

Response variable Fecunditya, n=912
Fertilitya, n=912
Ejaculate weightb, n=615
  Coef s.e. χ2 d.f. P Coef s.e. χ2 d.f. P Coef s.e. χ2 d.f. P
Fixed effects
 Age −0.67 0.04 305.0 1 <0.0001 −0.81 0.11 52.5 1 <0.0001     5.8 3 0.1198
 Body weight 0.16 0.02 97.0 1 <0.0001 0.01 0.08 0.002 1 0.9636 5.44 0.40 183.6 1 <0.0001
 Mating rate 0.04 0.02 6.8 1 0.0091 0.13 0.08 2.9 1 0.0874
 Mitochondrial lineage     7.3 2 0.0266     1.8 2 0.3929     13.9 2 0.0010
 Nuclear lineage     6.6 2 0.0373     0.0 2 0.9979     4.6 2 0.0986
 Mito × Nuc     12.5 4 0.0141     8.1 4 0.0887     24.8 4 <0.0001
 Age × Mito     4.4 2 0.1123     0.3 2 0.8724     31.7 6 <0.0001
 Age × Nuc     6.0 2 0.0495     2.4 2 0.2964     24.7 6 <0.0001
 Age × Mito × Nuc     10.0 4 0.0422     2.3 4 0.6766     36.4 12 <0.0001
Random effects Variance (σ2)
Variance (σ2)
Variance (σ2)
 Line 2.061 × 10–9 0.00 0.08
 ID 2.066 × 10–9 0.40 1.08

Abbreviations: Coef, coefficient; d.f., degrees of freedom; Mito, mitochondrial lineage; Nuc, nuclear lineage. P< 0.05 highlighted in bold.

a

Female.

b

Male.