Gas-exchange data presented: A subset of Vavilov wheat landraces from a single seed descent and four commercial checks (Mace, Baxter, Banks and Pastor) were grown in 2 x 3m plots in the field (Yanco, NSW - 2018). Commercial checks represent current elite and older released commercial varieties. A-Ci curves were measured on the youngest fully expanded leaf for n=2-3 plants between 10 - 4pm at an irradiance of 1500 PAR. Analysis of data to determine Vcmax and J: Using PlantEcoWrap (Stinziano et al., 2020) and the wheat kinetic parameters determined by Kane et al. (1994) and Prins et al. (2016) with the wheat gmes and gamma star from Silva-Perez et al. (2017). The data was normalised to 25oC using the Ea for Kcair and gmes from tobacco (Bernacchi et al., 2002).