Characterization of soybean population with sulfonylurea herbicides tolerant alleles

Abstract

With the introduction of commercial soybean genotypes with Als1 and Als2 alleles that confer tolerance to different active ingredients of sulfonylurea group, this work aims to test soybean populations for the presence/absence of Als1 and Als2 alleles and evaluate the agronomic impact of these alleles addition. These trials were conducted in experimental stations of DuPont Pioneer at Sorriso, Mato Grosso state and Planaltina, Federal District. Four populations were evaluated with 40 genotypes each; 10 genotypes without Als1 and Als2 (null), 10 genotypes containing Als1, 10 containing Als2 and 10 genotypes containing both alleles. These populations were tested for different traits. The grain yield average at Planaltina and Sorriso were 2888 and 2456 kg ha , respectively, and they were not statistically different from each other. Also, the other traits indicated similar behavior among classes. As the studied populations were developed for this study, they were inferior than the checks. This work demonstrated that in the four studied populations, the addition of Als1 and/or Als2 alleles did not cause significant differences in the evaluated traits.

Herbicide management in glyphosate and sulfonylurea-tolerant soybeans

“…Thus, soybean cultivar W20 STS was developed, which presented high tolerance in post-and pre-emergence for some sulfonylureas (SEBASTIAN et al, 1989). Such tolerance is conferred by semidominant alleles called Als1 and Als2 (WALTER et al, 2014;MANTOVANI et al, 2017). STS cultivars are highly tolerant to the chlorimuron herbicide, which can be applied up to four times above the recommended dose for non-STS cultivars (GREEN, 2007;ROSO;VIDAL, 2011;ALBRECHT et al, 2017).…”