Mapping of a Major QTL, qBK1Z, for Bakanae Disease Resistance in Rice

Bakanae disease is a fungal of rice (Oryza sativa L.) caused by the pathogen Gibberella fujikuroi (also known as Fusarium fujikuroi). This study was carried out to identify novel quantitative trait loci (QTLs) from an indica variety Zenith. We performed QTL mapping using 180 F2:9 recombinant inbred lines (RILs) derived cross between resistant variety, Zenith, and susceptible Ilpum. A primary genotypes phenotypes RILs indicated that locus qBK1z conferring bakanae resistance Zenith located in 2.8 Mb region bordered two RM (Rice Microsatellite) markers, RM1331 RM3530 on chromosome 1. The log odds (LOD) score 13.43, accounting for 30.9% total phenotypic variation. finer localization delimited at approximate 730 kb interval physical map Chr01_1435908 (1.43 Mbp) RM10116 (2.16 Mbp). Introducing or pyramiding with other previously identified QTLs could provide effective genetic control rice.