| Abstract: | Barley variety NP 113 had higher accumulations of dry matter (DM) and starch than its high-lysine mutant, Notch-2, during grain development. Protein, amylose and amylopectin content per grain were lower in Notch-2 than NP 113. Reducing sugars, free glucose, total fructose and non-reducing sugars were 1.57–3.15-fold in Notch-2 grain as compared with NP 113 grain. DM, protein, starch, amylose and amylopectin per grain increased during grain development. Soluble sugar contents per grain were maximum at 24 days after anthesis. Lower DM accumulation in the Notch-2 mutant as compared with its parent, NP 113, is due to lower starch deposition. Further, the limitation of starch synthesis in the Notch-2 mutant is not due to any limitation in the supply of soluble sugar precursors. |
