Identification of physiological races of Plasmodiophora brassicae and resistance of oilseed rape varieties in Jiangxi
Clubroot disease of oilseed rape(Brassica napus L.)in Jiangxi province are distributed in many cities,especially occurred seriously in Wuyuan of Shangrao,Yongxin of Ji'an,Ruichang of Jiujiang and other places.In order to clarify physiological races of Plasmodiophora brassicae in the main oilseed rape production areas of Jiangxi province,sinitic clubroot differential(SCD)identification system was used to identify the physiological races,and three physiological races were characterized,including Pb1,Pb5 and Pb12.To screen out suitable oilseed rape varieties for planting in the area of clubroot disease in Jiangxi province,resistance of oilseed rape materials to clubroot was evaluated.The results of indoor pot identification showed that disease index of oilseed rape varieties'P360429001''2018362481''P360924009''P360281040''Zhongyouza 12''Huayouza 62R'and'Huashuang 5R'were all lower or equal to 30.00,of which'Huayouza 62R'and'Huashuang 5R'showed moderate resistance,disease index of'Huayouza 62R''Qinyou DK4''Yangguang 50''P360429001'and'ZS115R'was lower than 30.00 in the field,but only 'Huayouza 62R'showed moderate resistance to Pb1 physiological race.The screened oilseed rape materials were suitable for cultivation in areas with clubroot disease in Jiangxi,which provided a scientific basis for the prevention and control of Jiangxi oilseed rape clubroot disease and development of disease-resistant oilseed rape resources.
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维普
