Maternal dietary supplementation with different sources of selenium on antioxidant status and mortality of chicken embryo in a model of diquat-induced acute oxidative stress

•Estabilished an acute oxidative stress model of diquat-induced chicken embryos.•Diquat significantly increased free radicals and induced oxidative stress.•Maternal supplementation with Se could alleviate the negative effects of diquat.•SM had better protective effects against oxidative stress induced by diquat than SS.