Table 3.

Overall relative interaction index per species calculated as (biomass in a monoculture subtracted from biomass in a mixture)/(biomass in a monoculture added to biomass in a mixture)

Species	Domestication status	Relative interaction index
Hordeum vulgare subsp. spontaneum	Progenitor	0.10
Triticum monococcum subsp. aegilopoides	Progenitor	−0.25
Aegilops speltoides	Wild	−0.14
Bromus brachystachys	Wild	−0.21
Eremopyrum orientale	Wild	0.15
Taeniatherum caput‐medusae	Wild	0.15

Positive values indicate that the species produced higher biomass in a mixture compared with a monoculture, and negative values indicate that the species produced lower biomass in a mixture compared with a monoculture.