The values of parameters derived from P700 absorbance in leaves of Z16, H89, CN19, and XZ31. ΦPSI (A), effective quantum yield of PSI; ΦNA (B), quantum yield of non-photochemical energy dissipation of PSI reaction centers due to acceptor side limitation; ΦND (C), quantum yield of non-photochemical energy dissipation in PSI reaction centers due to donor-side limitation (C); Pm (D), maximal P700 signal. Values are means ± SD from four independent biological replicates (n = 4). Different letters indicate significant differences among Z16, H89, CN19, and XZ31 (p < 0.05) following Duncan’s multiplication range test. Z16, H89, CN19, and XZ31 present accessions of Triticum monococcum (W2n), Triticum dicoccum (W4n), Triticum aestivum (W6n), and octaploid Triticale (T8n), respectively.