Evaluation location: Illinois, United States
Accessions in maturity groups I to IV, PI 490765 to PI 507573 were evaluated for descriptive characteristics, agronomic performance, and seed composition on the Agronomy-Plant Pathology South Farm, University of Illinois, Urbana (40.13N lat.). Also included were cultivars in the same maturity groups, developed at public institutions in the United States and Canada, and released by 1988. All tests were replicated once per year. Plots were four rows wide, with rows 4.7 m long and 75 cm between rows. The test was blocked by maturity group. The center two rows were end trimmed to 3.2 m one month after planting. Only the center two rows of each plot were harvested for yield. Planting dates were May 13, 1989 and May 8, 1990. Seed composition was analyzed at the USDA Northern Center for Agricultural Utilization Research in Peoria, IL. Fatty acid composition was obtained by gas liquid chromatography of the methyl esters. Oil and protein for samples with yellow seed coats were analyzed using the near infrared method for whole-grain analysis.