Sirius cultivar parameters with the value ranges used in ideotype optimization, from Semenov et al. (2014)

(1) Using a model of canopy photosynthesis, it was shown that 10% in L could be achieved if λ (Rubisco specificity factor) was optimized (Zhu et al., 2010). (2) Genetic variations of Ph up to 20% were observed for wheat (Mossad et al., 1995; M. Ishag et al., 1998). (3) Varietal difference in number of days till heading under long and short day conditions varied between 9.74 and 107.40 in a photoperiodic response experiment (Košner and Žurková, 1996). (4) Genetic variation of Gf up to 40% was observed for wheat (Robert et al., 2001; Charmet et al., 2005; Akkaya et al., 2006). (5) The reported range of genetic variation for flag leaf area under unlimited water and nitrogen was up to 40% (Fischer et al., 1998; Shearman et al., 2005). (6) Large genotypic variation in root characteristics and water uptake was reported (Asseng et al., 1998; Manschadi et al., 2006).