Association of Total Sugar Content with Other Seed Traits of Diverse Soybean Cultivars
2000
Geater, Chandler W. | Fehr, Walter R.
Total sugar content of soybean [Glycine max (L.) Merr.] seeds is considered to be important for the quality of some soyfoods. The objective of this study was to determine the association of total sugar with other seed traits of soybean to facilitate the development of cultivars with appropriate seed composition. Total sugar, protein, oil, fiber, and seed size of 23 conventional and food-grade cultivars were evaluated in replicated tests at eight Iowa locations in 1998. Total sugar content was determined by acid hydrolysis, and protein, oil, and fiber were measured by near-infrared reflectance (NIR). There were significant differences among the cultivars for all traits. Total sugar was most highly correlated (−0.81) with the sum of protein + oil (P + O). Seed size had a major influence on the association of total sugar with protein, oil, and fiber individually. Analysis of P + O by NIR was not influenced by seed size and should be a useful method of predicting differences among genotypes for total sugar content.
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