Stability of sugar content in soybean strains

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Abstract
Objectives in this study were to measure total sugar and individual sugar content in whole, mature, soybeans of certain strains and to determine the stability of these components in strains grown over a wide geographical area. Soybean seed of three selected strains from each Maturity Group in the 1970 Uniform Tests‐Northern States were analyzed for total sugar, sucrose, raffinose and stachyose content. For Maturity Groups 00, 0, I, II, III and IV there were 10, 12, 23, 33, 27 and 24 locations, respectively. The locations were in 17 states and 2 Canadian provinces. The average content of total sugar, sucrose, raffinose and stachyose was 9.36, 5.96, 0.75 and 2.65 g per 100 g seed, respectively. Analysis of variance of total sugar content and individual sugars among the three strains within each Maturity Group revealed significant differences (P<.01) in total sugar among strains in Maturity Groups II and III but not in the other four Maturity Groups. Except for strains within Maturity Group IV, there were significant differences (P<.01 or P<.05) among the strains within each Maturity Group for sucrose, raffinose and stachyose. Few significant environmental index (linear) x strain interactions were observed for total sugar content or for any of the individual sugars.

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