抗根结线虫番茄砧木品种的选育

抗根结线虫番茄砧木线虫绝1号、线虫绝2号、线虫绝3号、线虫绝4号分别是以BJ-7、DB-14、DB-15、DB-17为母本，以WY抗-12为父本配制的一代杂种，无限生长类型，长势强，根系发达，高抗南方根结线虫，经盆栽根结线虫抗性鉴定，根结级数均为0级。利用其进行番茄嫁接栽培试验，嫁接亲和性好，增产幅度显著，线虫绝1号、线虫绝2号、线虫绝3号、线虫绝4号砧木嫁接金棚1号番茄分别比不施药的自根苗处理增产58.05 %、50.76 %、76.96 %和75.95 %，其中线虫绝3号、线虫绝4号砧木嫁接处理分别比施药的自根苗处理增产32.33 %和31.57 %，差异达极显著水平，且嫁接后不影响番茄品质。

Selection and Breeding of Tomato Rootstock Variety with Resistance to Root-knot Nematodes

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.