Incremento de produtividade na soja com uso da fonte de Resistência genética nativa peking em área com pressão de heterodera glycines

Abstract

Objective: evaluate soybean yield performance using the native Peking resistance source in an area under Heterodera glycines pressure. Methodology: the experiment was conducted in the municipality of Luís Eduardo Magalhães, Bahia, using a completely randomized design with two treatments and six replications: T1, a susceptible cultivar, and T2, a cultivar carrying the Peking resistance source. Plant height, initial egg population in the soil at planting, number of cysts per gram of root at 60 days after planting, and yield (kg/ha) were evaluated. Results: the cultivar carrying the Peking resistance source showed higher yield than the susceptible cultivar, indicating better agronomic performance under nematode infestation. However, it also showed a higher number of cysts per gram of root, suggesting that the observed yield gain may be more closely related to plant tolerance than to reduced nematode reproduction. The initial egg population in the soil did not differ between treatments. Final considerations: it was concluded that the Peking resistance source contributed to reducing soybean yield losses in an area infested by Heterodera glycines, but its use should be associated with integrated management practices to improve the sustainability of the production system.