Fig. 4
Genetic map of RSA QTLs identified in 192 Ethiopian durum wheat accessions along with previously published studies projected onto SNP-based tetraploid consensus map published in Maccaferri et al. (2015). RSA QTL identified in the present study are listed on the left side of the chromosomes with their significance level: ** = marker-wise significance of P ≤ 0.01 (− log10P ≥ 2); *** = marker-wise significance of P ≤ 0.001(− log10P ≥ 3); **** = experiment-wise significance of P ≤ 0.05/marker-wise significance of P ≤ 0.0001 (− log10P ≥ 4). RSA QTLs identified in previous studies, orange-filled bars for durum wheat and blue-filled bars for bread wheat, listed on the right side and references given in parentheses. Grey-filled bands are for RSA QTL clusters on chromosomes 1A and 1B (a) and a distinct root growth angle (RGA) QTL cluster identified on chromosome 6A from 105 to125 cM (b). Black-filled bars are for QTLs with R2 < 5%; red bars for R2 values from 5 to 10% and yellow bars for R2 > 10%. The length of bars indicates the confidence interval of each QTL or QTL cluster. Manhattan plot for the major RGA QTL identified on chromosome 6AL (c)