Título:	Competitive interaction of maize genotypes with different technologies in coexistence with wild poinsettia and Alexandergrass.
Autoria:	GALON, L. BERNARDI, N. D. C. CONCENÇO, G. TONIN, R. J. SILVA, A. F. da TIRONI, S. P. PERIN, G. F. ASPIAZÚ, I. SOARES, E. R.
Afiliação:	LEANDRO GALON, UNIVERSIDADE FEDERAL DA FRONTEIRA SUL; NATHALIA DALLA CORTE BERNARDI, UNIVERSIDADE FEDERAL DE PELOTAS; GERMANI CONCENCO, CPACT; RODRIGO JOSÉ TONIN, UNIVERSIDADE FEDERAL DA FRONTEIRA SUL; ALEXANDRE FERREIRA DA SILVA, CNPMS; SIUMAR PEDRO TIRONI, UNIVERSIDADE FEDERAL DA FRONTEIRA SUL; GISMAEL FRANCISCO PERIN, UNIVERSIDADE FEDERAL DA FRONTEIRA SUL; IGNÁCIO ASPIAZÚ, UNIVERSIDADE ESTADUAL DE MONTES CLAROS; EDIMAR RODRIGUES SOARES, DEPARTAMENTO DE AGRICULTURA E PECUÁRIA DE ITARIRI.
Ano de publicação:	2026
Referência:	International Journal of Maize & Sorghum, v. 23, e1363, 2026.
Conteúdo:	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.
Thesagro:	Euphorbia Heterophylla Amendoim Bravo Erva Daninha
Palavras-chave:	Planta invasora Urochloa plantaginea
Digital Object Identifier:	https://doi.org/10.18512/ijms2026e1363
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMS)