Also in 1980s, breeders introduced genetic variation into soybean seeds and subsequently screened for those that emerged into sulfonylurea resistant plants. One plant showed significant increase in SU resistance, as a result of a single amino acid mutation in the ALS enzyme (Sebastian et al., 1989). The progeny of this plant was utilized in breeding programs to incorporate the trait into a wide range of agronomically useful soybean varieties, which became commercially available in 1993 as STS® soybeans (Sulfonylurea tolerant soybeans).
STS® is a registered trademark of DuPont or its affiliates
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