Abstract:

To improve production of rapeseed and development of scenic spots in Jiangxi Province, distribution of rape clubroot (by Plasmodiophora brassicae) and its pathogenic differentiation had been investigated from 2011 to 2016. Results showed that the disease was mainly distributed in the local area of northeast Jiangxi. Race 4 and 9 of P. brassicae in the clubroot rape were collected in different years. Identification showed that Race 4 was only found in the northeast of Jiangxi. More than 200 rape cultivars and lines were artificial inoculated in fields of disease nurs? eries. Results showed that all materials were resistant to Race 9, but 94.74% were susceptible to Race 4. Only 12 varieties, including Luobozihua and 59-013, showed medium resistance to Race 4. These results supplied race-spe? cific resistant resources for breeding.

Key words: scenic spots, Plasmodiophora brassicae, race identification, resistance analysis