【摘要】 以抗根肿病红菜薹（Brassica rapa ssp. chinensis var. purpurea）种质资源GD1为抗源供体，以优异洪山菜薹早熟品系DGZ1902为背景材料进行回交转育，针对抗源携带的抗病基因CRzi8开发PARMS型分子标记，进一步结合分子标记辅助选择、单株优选以及根肿病接种鉴定，创制抗根肿病洪山菜薹新品系。结果表明，开发的标记可准确鉴定回交世代群体的抗性单株。田间病圃抗性鉴定及农艺性状观察表明，创制的洪山菜薹抗根肿病品系CR-DGZ1902高抗根肿菌4号生理小种，同时具有洪山菜薹的农艺性状特征及DGZ1902的早熟特性。更多还原

【Abstract】 Using clubroot resistance(CR)Brassica rapa ssp. chinensis var. purpurea germplasm GD1 as the resistant donor,and using DGZ1902,an early mature strain of Hongshancaitai,as the background material,backcross breeding was conducted. The penta-primer amplification refractory mutation system(PARMS)marker for CR gene CRzi8 carried by CR donor was developed and furtherly applied in the marker assistance selection(MAS),single plant selection and identification of root disease inoculation,finally the new CR Hongshancaitai line was created. The results showed that the PAMRS marker for CRzi8 could accurately detect the CR individuals from the backcross breeding program. Field resistance test and agronomic traits evaluation indicated that the developed CR Hongshancaitai line CR-DGZ1902 was resistant to Plasmodiophora brassicae pathotype 4,and had both agronomic characteristics of Hongshancaitai and early maturity characteristics of DGZ1902.更多还原