The host resistance gene, Xa21, from Oryza longistaminata, is integrated into the genome of Oryza sativa for its broad-range resistance to rice leaf blight caused by X. o. pv.
A gene from Oryza longistaminata, Xa21, has been incorporated into the genetic material of Oryza sativa to offer broad immunity against rice leaf blight triggered by X. o. pv.