Fig. 1
Relationship between heterozygosity within populations and their genetic distances to Gallus gallus. The full names of the categories and description are in Additional file 1: Table S1). The different breed categories are represented by symbols of different colors and shapes. The fitted regression line, with the equation heterozygosity = 0.572–0.706 × (genetic distance to G. gallus), is drawn in red. The R2 for the linear regression was 0.886 (p < 0.001)