The three polymorphisms identified in the dog OXTR gene.

<p>The figure shows the canine OXTR gene with exons 1 & 2, the intron and the surrounding regulatory regions. Polymorphisms in the 5′ and 3′ UTR regions are marked with their rs number if applicable or with their position and base change.</p

Factor loads of the different variables on each behavioral scale.

<p>Behavioral variables that were related to any of the four scales according to the Principal Component Analysis and their factor loads are shown; values <0.2 are suppressed for the sake of clarity.</p

Friendliness scores mean differences between the different 19131AG genotypes in German Shepherds (a) and Border Collies (b).

<p>*: p<0.05, **: p<0.01.</p

Friendliness scores mean differences between the different rs8679684 genotypes in German Shepherds (a) and Border Collies (b).

<p>*: p<0.05.</p

Sequencing primers and annealing temperatures used for PCR amplification of dog OXTR gene regions.

<p>Sequencing primers and annealing temperatures used for PCR amplification of dog OXTR gene regions.</p

Associations of the OXTR SNPs with the behavioral scales.

<p>: p<0.01,</p><p>: p<0.05,</p><p>ns.: p>0.05.</p

Behavioral variables coded in each test.

<p>Definitions for the 0–3 scores of each behavioral variable coded during the five tests are provided.</p

Allele frequencies for the two breeds studied.

<p>The proportion of each genotype is provided for German Shepherds and the two populations (Hungary, Belgium) of Border Collies separately. Statistical tests for Hardy-Weinberg Equilibrium (HWE) are also provided.</p