油菜抗根肿病品种在云南省西南发病区的田间评价OACSTPCD

In this study,we clarified the field resistance,main agronomic traits and yield performance of'Huashuang 5R'and'Huayouza 62R',to screen out excellent disease-resistant varieties in the clubroot disease areas.Field experiments were carried out in three rape clubroot disease areas of Tengchong City,Lianghe County and Linxiang County in southwest Yunnan Province.And the varieties developed by our group and local main varieties were used as controls.The results of field experiments showed that the two clubroot-resistant varieties of'Huashuang 5R'and'Huayouza 62R'could mature normally and overwinter safely at the three test sites,with a growth period of 176-199 d,and the performance of each growth period was uniform.'Huashuang 5R'and'Huayouza 62R'showed high resistance to clubroot disease in Tengchong and Lianghe,and disease resistance in Linxiang.The agronomic traits of'Huashuang 5R'and'Huayouza 62R'were good in the three test sites.Compared with the seven control varieties in three test sites,the yield of'Huashuang 5R'was reduced by 2.71%compared with'Yunyouza No.12'in Lianghe;and the yield of'Huashuang 5R'compared with'Yunyouza No.12'and'Za 1256'in Tengchong,'Yunyouza 15'and'Huayou No.8'in Lianghe,'Yunyouza No.12'and'Deyou No.1'in Linxiang was increased by 7.49%to 56.83%;the yield of'Huayouza 62R'was 5.76%lower than that of'Yunyouza No.12'in Lianghe,and was 4.61%lower than'Deyou No.1'in Linxiang;and the yield of'Huayouza 62R'compared with'Yunyouza No.12'and'Za 1256'in Tengchong,'Yunyouza 15'and'Huayou No.8'in Lianghe,'Yunyouza No.12'in Linxiang was increased by 4.12%to 51.90%.'Huashuang 5R'and'Huayouza 62R'showed strong resistance to clubroot disease in the three test sites,with growth period of 176-199 d,and the agronomic traits and yields were normal compared to controls,and could be used as main cultivars in southwest Yunnan Province where clubroot disease was serious.