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Methods for Evaluating Semolina Color in Early Generations¹

The feasibility of evaluating seed samples from single plants of durum wheat (Triticum turgidum L.) for semolina color was examined by comparing the relative precision of different combinations of sample sizes and milling methods. Four sample size and mill combinations were used with 10 durum cultivars. The 200-g sample size milled on the Brabender Quadramat Micromill was the most sensitive test. Data were highly correlated with those from 2- and 1-g sample sizes milled on the Udy Cyclotec mill (r = 0.85 and 0.90, respectively). Consequently, screening for semolina color using 2- or 1-g samples should be effective.

Key Words: Durum wheat • Semolina color • Breeding • Early generation testing • Triticum turgidum L.

² Assistant professor of agronomy, Oklahoma State Univ., Stillwater, OK 74078; professor of agronomy, North Dakota State Univ., Fargo, ND 58105; and manager of Cereal Quality Laboratories, North American Plant Breeders, Berthoud, CO 80513.

Received for publication February 22, 1980.