摘要
本文报道用接种鉴定技术研究我国南方甘薯品种资源对蔓刈病抗性的结果，完成了４４３份品种的盆苗接种鉴定，表现高抗（ＨＲ）的品种２份，抗病（Ｒ）的品种３０份，中抗（ＭＲ）的品种４９份，中感（ＭＳ）的品种９６份，感病（Ｓ）的品种６２份，高感（ＨＳ）的品种２０４份。对筛选出具有抗病以上水平的３１份品种进行重复鉴定，结果与初筛选对比基本一致，表明这些品种的抗性相对稳定；与此同时还进行田间接种鉴定试验，多数品种的发病程度低于盆苗接种鉴定试验，其中有１２份品种表现高抗。并初步探讨了甘薯品种对蔓刈病抗性与薯块产量的关系，发现抗病品种与感病品种接种后对薯块形成和膨大的影响存在显著差异。
The Fusarium wilt-resistant capasity of sweetpotato (FWSP) was tested in 443 sweetpotato varietiesin south China with an artificial inoculating method. Results showed that, 2 varieties are highly resistant(HR); 30 varieties resistant (R); 49 varieties moderately resistant (MR); 96 varieties moderately sensitive(MS); 62 varieties sensitive (S) and 204 varieties highly sensitive (HS). The repeat test to MR or R or HRvarieties gave an identical result and indicated that the resistance of these varieties to FWSP issteady. Simultanneously, the identification by field infection has been undertaken. Most of the varieties showedlow morbidity than that of Pot inoculation, among which 12 varieties were highly resistant (HR). The relationship between resistance and yield of sweetpotato was preliminarily studied. The development of the root tubersof sweetpotato was greatly affected by FWSP.
基金
国际马铃薯中心[CIP]合同项目
关键词
甘薯
蔓刈病
抗病性
品种资源
鉴定
Sweetpotato
Fusarium wilt
Inoculating
Disease resistance
Disease index
