ORIGINAL ARTICLE
Glyphosate in agronomic performance and seed quality of soybean with cp4-EPSPs and cry1Ac genes
 
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Department of Crop Science, University of São Paulo, “Luiz de Queiroz” College of Agriculture, Piracicaba, São Paulo, Brazil
2
Department of Crop Science, Federal University of Paraná, Palotina, Paraná, Brazil
3
Department of Crop Science, São Paulo State University “Júlio de Mesquita Filho”, College of Agronomic Sciences, Botucatu, São Paulo, Brazil
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
CORRESPONDING AUTHOR
André Felipe Moreira Silva   

Department of Crop Science, University of São Paulo, “Luiz de Queiroz” College of Agriculture, Piracicaba, São Paulo, 13418-900, Brazil
Online publish date: 2018-12-03
Submission date: 2018-05-23
Acceptance date: 2018-11-11
 
Journal of Plant Protection Research 2018;58(4):345–353
KEYWORDS
TOPICS
ABSTRACT
The “second generation” of glyphosate-tolerant soybean (GT2 soybean) was developed through a different technique of insertion of the glyphosate-insensitive EPSPs gene, in comparison with “first generation” of glyphosate-tolerant soybean. However, there is not enough information available about glyphosate selectivity in GT2 soybean and the effects on the quality of seeds produced. The aim of this study was to evaluate tolerance to glyphosate and seed quality of soybean cultivar NS 6700 IPRO (GT2) with cp4-EPSPs and cry1Ac genes, after application at post-emergence (V4). The experiment was conducted in a randomized block design with four replicates and seven treatments, or rates of glyphosate (0; 720; 1,440; 2,160; 2,880; 3,600; 4,320 g of acid equivalent − a.e. · ha−1). Assessments were performed for crop injury, SPAD index and variables related to agronomic performance and seed quality. A complementary trial with the same cultivar and treatments in a greenhouse was conducted in a completely randomized design with four replications. Data analysis indicated no significant effect of glyphosate on V4 on agronomic performance and physiological quality of seeds, for two growing seasons. The soybean cultivar NS 6700 IPRO (GT2), with cp4-EPSPs and cry1Ac genes, was tolerant to glyphosate up to the maximum rate applied (4,320 g a.e. · ha−1) at post-emergence (V4). The quality of soybean seeds was not affected by glyphosate up to the maximum rate applied (4,320 g a.e. · ha−1) at post-emergence (V4).
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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