Fig. S1 Counts of inbreeding coefficients (F) in the additional data set (generations 6–7; N = 1003 individuals), calculated from pedigrees that were progressively shortened from seven to three generations.

Fig. S2 Average strength of correlation between pedigree-based inbreeding coefficient F (inverted) and three phenotypic traits (Tarsus length length, adult mass, mass day 8) in relation to variance in F in two data sets.

Table S1 Information on the 11 microsatellite markers used in this study.

Table S2 Correlations between pairs of phenotypic traits.

Table S3 Correlations between various measures of heterozygosity and phenotypic traits for the main data set (generations 2–5).

Table S4 Correlations between internal relatedness (IR) (inverted to give positive correlations) based on varying numbers of SNPs and phenotypic traits for the main data set (generations 2–5).

Table S5 Correlations between pedigree-based F (inverted to produce positive correlations) and phenotypic traits in the additional data set from generations 6–7 (all N = 1003 individuals).

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