Abstract：The‘Xianchongjue No.1’,‘Xianchongjue No.2’,‘Xianchongjue No.3’and‘Xianchongjue No.4’of tomato rootstock materials for resistanting to rootknot nematodes were respectively developed from four crosses between the same male WY Kang-12 with four females BJ-7，DB-14， DB-15，DB-17.The F1 hybrid was of infinite growth type,could grow strongly with well-developed root system and high resistance to southern root-knot nematode disease.The identification of root knot series was 0 by potted planting.The grafted organizes had good affinity and increase yield significantly in tomato cultivation experiment. In this experiment that tomato‘Jinpeng No.1’grafted on rootstock of‘Xianchongjue No.1’,‘Xianchongjue No.2’,‘Xianchongjue No.3’and‘Xianchongjue No.4’.Compared with the contrast which is non-grafted and non-controlled,the former ones were immune to root-knot nematodes and the production increased 58.05 %,50.76 %,76.96 % and 75.95 %，respectively.Moreover,‘Xianchongjue No.3’and‘Xianchongjue No.4’increased 32.33 % and 31.57 % compared with the controlled and non-grafted.Especially,there was no influence on tomato quality.
