Azide-based mutagenesis suppresses Striga hermonthica seed germination and parasitism on maize varieties

Abstract

Small-scale farmers currently produce more than 90% of the maize grown in Kenya. However, the parasitic weed, Striga hermonthica has become a menace because it is a widespread parasitic weed causing severe damages to major cereals like maize and sorghum. Mutant lines of maize were created
in the laboratory using sodium azide (NaN3) and their performance in respect to the degree of Striga resistance screened. The presence of active chemical stimulants in the root exudate was further investigated. This is the first report on mutagenic conversion of Striga-susceptible to Striga-resistant maize varieties (K9908, K9910 and K9911). Stable performances of the new  arieties have been demonstrated in Striga-infested fields in western Kenya by  agronomic researchers