Fig. 1

Genome-wide plot of percentage of genetic variance for traits measured during heat stress. Traits were measured before heat treatment (day 20 or 21), during acute heat treatment (day 22) and chronic heat treatment (day 28), and the differentials between trait measurements due to 1 day of heat treatment (day 22–20) and to 7 days of heat treatment (day 28–20 or 28–21) were calculated. Only traits that reached significance in the GWAS (≥0.05 % of the genetic variation) are displayed. Plots for body temperature (BT) measured on days 20, 22, 28, and the differential 28-20 (a–d); plots for body weight (BW) measured on days 21, 28, and the differential 28–21 (e–g); plot for digestibility, measured from ileal content, on day 28 (H); plot for  % of breast weight (i), calculated from  % of total body weight, and measured on day 28. Results show the percentage of genetic variance that is explained by each non-overlapping 1-Mb window, labelled by the index number of the windows coloured and ordered by chromosome (1–27, and Z)