COMPETITIVE INTERACTION OF MAIZE GENOTYPES WITH DIFFERENT TECHNOLOGIES IN COEXISTENCE WITH WILD POINSETTIA AND ALEXANDERGRASS

Authors

  • Leandro Galon Universidade Federal da Fronteira Sul (UFFS), Campus Erechim, Erechim, RS, Brazil https://orcid.org/0000-0002-1819-462X
  • Nathalia Dalla Corte Bernardi Universidade Federal de Pelotas (UFPel), Capão do Leão, RS, Brazil
  • Germani Concenço Embrapa Clima Temperado, Pelotas, RS, Brazil
  • Rodrigo José Tonin Universidade Federal da Fronteira Sul (UFFS), Campus Erechim, Erechim, RS, Brazil
  • Alexandre Ferreira da Silva Embrapa Milho e Sorgo, Sete Lagoas, MG, Brazil
  • Siumar Pedro Tironi Universidade Federal da Fronteira Sul (UFFS), Campus Chapecó, Chapecó, SC, Brazil
  • Gismael Francisco Perin Universidade Federal da Fronteira Sul (UFFS), Campus Erechim, Erechim, RS, Brazil
  • Ignácio Aspiazú Universidade Estadual de Montes Claros (Unimontes), Campus Janaúba, Janaúba, MG, Brazil
  • Edimar Rodrigues Soares Departamento de Agricultura e Pecuária de Itariri, Itariri, SP, Brazil

DOI:

https://doi.org/10.18512/ijms2026e1363

Abstract

Genetically modified maize hybrids, especially those resistant to herbicides, have been released in the Brazilian market. In this context, the study aimed to evaluate the competitive ability of three maize genotypes, 2B433 (Enlist®), Pioneer 30F53 (VYHR®), 13K288 PWE (Enlist®), and a control (conventional, non-transgenic) variety, with different biotechnological backgrounds, when competing with wild poinsettia (Euphorbia heterophylla) and Alexandergrass (Urochloa plantaginea). The experiment was a randomized block design with four replicates. Maize and competitors were studied at different plant proportions: 20:0; 15:5; 10:10; 5:15 and 0:20 plants per pot or 100:0; 75:25; 50:50; 25:75 and 0:100% (crop: weed) in replacement series experiments. Fifty days after emergence, stomatal conductance, transpiration rate, water use efficiency, relative chlorophyll content, as well as plant height and stem diameter were measured. The Enlist® technology maize genotypes (13K288 PWE and 2B433) showed better physiological and morphological performance compared to the conventional variety and 30F53 (VYHR®) when competing with Alexandergrass and wild poinsettia. It can be inferred that the increase in competitive capacity is due to the greater plant height of the 13K288 PWE (Enlist®) and 2B433 (Enlist®) genotypes. All maize genotypes were more competitive than the weeds, as indicated by the relative competitiveness indices. Based on these results, it can be inferred that there are differences between genotypes; however, further studies are needed to observe the relationship between competitive ability and the transgenic event

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Published

2026-06-18

How to Cite

Galon, L., Bernardi , N. D. C., Concenço, G., Tonin, R. J., Silva, A. F. da, Tironi, S. P., … Soares, E. R. (2026). COMPETITIVE INTERACTION OF MAIZE GENOTYPES WITH DIFFERENT TECHNOLOGIES IN COEXISTENCE WITH WILD POINSETTIA AND ALEXANDERGRASS. International Journal of Maize & Sorghum, 23, e1363. https://doi.org/10.18512/ijms2026e1363

Issue

Vol. 23 (2026): International Journal of Maize and Sorghum

Section

Scientific Paper

License

Copyright (c) 2026 Leandro Galon, Nathalia Dalla Corte Bernardi, Germani Concenço, Rodrigo José Tonin, Alexandre Ferreira da Silva, Siumar Pedro Tironi, Gismael Francisco Perin, Ignácio Aspiazú,Edimar Rodrigues Soares

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