Fusarium head blight(FHB)is a serious spike disease caused by Fusarium graminearum in wheat,seriously affecting the production of wheat.The application of resistant cultivar is one of the crucial ways to relieve the damage of the disease.In this study,59 wheat cultivars and 7 elite breeding lines were used to investigate the FHB resistance in field by spray inoculation,and the major resist-ance genes and gene loci,such as Fhb1,Fhb2,Fhb4,Fhb5 and QFhs.crc-2DL were detected by func-tional or closely linked markers.Besides,the differences of FHB resistance and plant height between the wheat varieties released in 2008 or earlier and the varieties released in 2009 or later were com-pared.The results showed that 16 wheat materials were identified as moderate resistance,which ac-counted for 24.2％.Specifically,the line 810619 showed the lowest disease index among all the evalu-ated lines,and was only a little bit higher than the resistance control variety of Sumai 3.Therefore the line 810619 can be considered as an elite new source for FHB breeding.Moreover,42 materials were identified as moderate susceptibility to FHB,which counted for 63.6％of the total examined materials.Molecular marker analysis showed that only T45048 contained the Fhb1 resistance gene,whereas 29 wheat materials such as E'mai 11,E'mai 18,and 810619 contained individual or both of the two resistance loci Fhb5 and QFhs.crc-2DL,suggesting that these two loci were more frequently used in the Fhb resistance breeding program in Hubei Province.Correlation analysis between the FHB disease index and plant height of the tested wheat lines from different years showed that even though the plant height continuously decreased upon the time,the FHB severity was not increasing signifi-cantly.No significant correlation was observed between the FHB severity and plant height in the wheat varieties since 2009.This study provides new insights for understanding the FHB resistance and molecular basis of the cultivars bred in Hubei Province.
维普
万方数据