*2.1. Genetic Material*

The grass pea collection, 250 accessions from USDA and 24 accessions from ICARDA, were evaluated as an initial genetic material in this study (Table S1). This genetic resource was coded "GP" and ordered. It was grown in the experimental field of Akdeniz University in Antalya, Turkey (36◦53 56.2 N 30◦38 30.3 E) in 2018. However, 184 out of 274 accessions were discarded from the study because they did not produce sufficient seeds. Remaining genetic material (90 accessions) and four registered controls (Karada ˘g, ˙ Ipta¸s, Gürbüz and Ceora) (Table S2) were used to conduct field trials in both locations, Antalya and Isparta, Turkey (Figure 1).
