Data/hora: 13/06/2024 07:52:10

Biblioteca(s): | Embrapa Soja.
Data corrente: | 07/04/2004
Data da última atualização: | 27/07/2007
Autoria: | KIIHL, T. A. M.; ARIAS, C. A. A.
Título: | Behavior of soybean [glycine max (L.) Merr.] genotypes transformed with the AHAS gene which confers tolerance to the herbicide imazapyr.
Ano de publicação: | 2004
Fonte/Imprenta: | In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.
Páginas: | p. 254.
Série: | (Embrapa Soja. Documentos, 228).
Idioma: | Inglês
Notas: | Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.
Conteúdo: | The transformation of the soybean [Glycine max (L.) Merril] cultivars BR-16 and Doko with the gene AHAS isolated from Arabdopsis thaliana resulted on the development of genotypes tolerant to imazapyr. In order to compare the conventional genotypes BR-16 and Doko (no sprayed) with their transformed counterparts (sprayed with imazapyr 100 g ae/ha) a trial was conducted in the greenhouse in the winter of 2001 (sowing occurred in july 2001). At harvest, the plants were divided in three thirds and the number of pods and seeds counted, the seeds weighted and the average number of seeds per pod determined. The genotype BR-16-AHAS was much more affected than Doko-AHAS when the genotypes were compared with their conventional counterparts. Since that the effect of the gene AHAS and the effects of the herbicide could not be separated, another experiment, only with the two AHAS genotypes (BR-16-AHAS and Doko-AHAS) and the application of zero and 100 g ae/ha of imazapyr during the summer (seeding occurred in December 2001) was conducted. The same observations made in the winter experiment were made and also, the height of the plants and the number of nodes were recorded. In this trial, the relative responses of the two genotypes were similar to the winter results, but the herbicides effect differed mainly on the most affected position in each genotype. Doko in the summer produced fewer pods in the medium third and, in the winter, in the upper third. The herbicide imazapyr applied on the dosage of 100 g ae/ha on transformed tolerant soybean with the AHAS gene may induce the development of sterile pods, mainly on the nodes located on the upper parts of the plants. The effect is due to the herbicide and not to the inserted gene and is more visible in winter conditions (lower temperatures and short-day conditions). This effect is very pronounced on BR-16 and less evident on Doko. Field trials should be done to evaluate the risks in commercial conditions.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (23756-1) - UMT - PL - -- - RF 633.34072 - W927a -  - DIS