Background and objectives:Effective and efficient selection of key quality traits is crucial to develop new durum varieties with improved end-use quality. This study was undertaken to develop a rapid micromilling protocol using a single Brabender Quadrumat Jr. (QJ) semolina mill without purification to predict milling performance and generate semolina for quality analysis. Findings: After grinding 200 g of durum wheat with a QJ mill with the reel sifter removed, the resulting wholemeal was sifted through a laboratory sifter equipped with a bottom screen of 180 µm to remove flour and a top screen of 630 µm to retain bran-rich fraction. Semolina materials between the two screens were collected. A model for predicting semolina yield (R 2 = 0.81) was developed based on the amounts of semolina and bran-rich fraction, thus eliminating the need for additional milling to recover semolina in the bran-rich fraction. There were highly significant correlations (r > 0.86) for semolina ash, yellowness, yellow pigment content, protein content, wet gluten, and gluten index between semolina prepared with this proposed protocol and those generated with a Allis-Chalmers mill. Conclusions: The micromilling protocol developed in this study is rapid and reliable for assessing durum milling performance and for preparing semolina for quality characterization. Significance and novelty: The proposed protocol modified QJ mill and optimized milling conditions. A robust and simplified model was developed for predicting semolina yield with one-step milling. It is a useful tool for breeding programs or genetic mapping studies that are usually large in sample number but very limited in sample size.
K E Y W O R D Sash content, durum wheat, milling performance, Quadrumat Junior mill, semolina yield, total milling yield | 803 WANG et Al.