Table 2 Results of the GLIMMIX model explaining variation in standardised forehead patch (FP) size as a function of individual sex, birth date and paternal and maternal FP size and condition while individuals were being cared for by their parents

From: Heritability and genetic correlation between the sexes in a songbird sexual ornament

Effect

d.f.

Estimate (s.e.)

F

P

Intercept

1, 8

−0.07 (0.21)

0.12

0.7313

Sex

1, 60

−0.06 (0.24)

0.06

0.8016

Hatching date

1, 60

0.83 (0.32)

6.19

0.0157

Sex × hatching date

 Female

1, 60

0.79 (0.35)

5.12

0.0272

 Male

0

—

—

—

Size of father's FP

1, 60

0.43 (0.10)

17.91

0.0000

Size of mother's FP

1, 60

0.30 (0.11)

8.02

0.0063

Mother condition

1, 60

0.23 (0.12)

3.89

0.0531a

Size of father's FP × mother condition

1, 60

0.23 (0.09)

5.84

0.0187

  1. Only significant explanatory fixed factors and covariates and/or involved in significant interactions in the final model are shown.
  2. aEstimate (s.e.) for mother's condition after removing the father's FP × mother condition interaction term=0.25 (0.12), F=4.23, 61 d.f., P=0.0442.
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