Evaluation of Roegneria for resistance to head scab caused by Fusarium graminearum Schwabe

71 accessions from 13 Roegneria species were evaluated for resistance to wheat scab. The results showed that 31 of the 71 accessions possessed high resistance (HR) to initial infection and high resistance (HR) to pathogen spread. The disease spread from inoculated floret to head rachis was not observed, and the incidence of head infection were lower under natural than under artificial inoculation conditions. The intergeneric hybrid F1 of Roegneria tsukushiensis (Honda) B.R. Lu, Yen et J.L. Yang. var. transiens (Hack.) B.R. Lu, Yen et J.L. Yang x Hordeum vulgare Linn. exhibited resistance (R) to pathogen invasion and high resistance (HR) to spread. Therefore, Roegneria could be used as scab resistant resources in cereal breeding. In addition, the relatioship between its resistance and ecological environments where Roegneria was distributed was discussed in this paper.