The selection and application of TuMV resistant germplasm of Chinese cabbage

“8407”is a disease resistant germplasm of Chinese cabbage which is highly resis-tant to turnip mosaic virus (TuMV),selected by the Vegetable Institute,Hebei Academy of Agri-cultural and Forestry Sciences.In 1985 and 1989,it was approved and accepted as one of the na-tional disease resistant germplasm of Chinese cabbage by the National Expert Group.The identifi-cation in 1989 showed that“8407”was highly resistant or immune to 19 TuMV strains from 10provinces/cities across the country.Therefore,it was regarded as the best germplasm both verti-cally and horizontally resistant to TuMV of Chinese cabbage.This germplasm was selected fromChang Paodan (Inner Mongolia)of Qingmaye system after 6 generations of successive self cross.Using the disease resistant germplasm of“8407”,we developed new multi-resistant varieties of“8361”and“8612”in 1983 and 1986 respectively,which was highly resistant to TuMV and downymildew and soft rot.These varieties have been extended to an areas of over 20000 ha.

大白菜芜菁花叶病毒病抗性遗传分析

为了明确不同感病亲本对大白菜芜菁花叶病毒病抗性遗传规律的影响,以大白菜抗TuMV的国家级抗源材料8407和高抗TuMV的高代自交系材料73为亲本之一,分别与2个感病材料冠291和06-247构建F1杂交组合,并制备F2群体。采用摩擦接种法对上述亲本及其F1、F2群体接种TuMV-C4,采用生物学观察的方法,根据病情分级和归类标准对大白菜TuMV抗性进行鉴定。结果表明,以8407为抗病亲本,当感病亲本为冠291时,表现为由1对显性基因控制;当感病亲本为06-247时,表现为由1对隐性基因控制。以73为抗病亲本,当感病亲本为06-247时,TuMV抗性由1对隐性基因控制;同一个抗病亲本,当感病亲本为冠291时,又表现为由两对隐性基因控制。因此,大白菜TuMV的抗性遗传规律十分复杂,同一个抗病材料,当感病亲本不同时,所配制的组合间TuMV抗性表现不同。