Measurements of hybrid fertility and a test of mate preference for two house mouse races with massive chromosomal divergence

Table 5 Pairwise comparisons of size of first litter for different categories of females using Dunnett’s method

Contrast	Estimate of difference in litter size between contrasted races	SE	df	t	p-value
CHBU–CHHN	−0.38	0.51	37.06	−0.74	0.83
F₁–CHHN	−5.20	0.48	37.08	−10.80	< 10⁻⁴
BC.23–CHHN	−4.50	0.62	45.94	−7.27	< 10⁻⁴
BC.24–CHHN	1.33	0.53	42.63	2.49	0.06
BC.23–F₁	0.70	0.62	46.00	1.13	0.61

The LMMs applied contained female category (see text) as the only explanatory variable and the identity of the females’ parents as a random effect to control for including siblings in the data

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