甘薯兼抗薯瘟病和蔓割病种质筛选鉴定

用甘薯瘟2个致病型菌株对557份甘薯品种(系)分菌系做盆苗和田间接种鉴定,并用蔓割病菌接种鉴定.结果表明,筛选出兼抗薯瘟病2个菌系的品种(系)31份,兼抗甘薯瘟和蔓割病的品种(系)有16份,其中泉薯860、泉薯854、金山93、榕选416、金山908、广薯88-70和泉薯853等7份与我省主栽抗病品种湘薯75-55(CK)相比,具有类似的双抗性能力,而其抗瘟能力更强.福薯87、林泗2号、金山57和湛93-16等4份对照品种只抗单个病害或兼抗单个菌系.

Identifying and screening sweet potato varieties resistance to bacterial wilt and fusarium wilt diseases

Five hundreds and fifty-seven varieties were inoculated with two sweet potato bacterial wilt (Ralstonia solanacearium) strains at seedlings in pot and field,and 31 varieties were selected showing resistant to both strains.Following inoculated with fusarium wilt fungi (Fusarium oxysporum f.sp.batatae),16 of 31 varieties showed resistant to both bacterial wilt and fusarium wilt diseases.Comparing with major variety Xiangshu75-55 in Fujian,seven varieties of them showed similar resistance to two diseases,but more resistant to bacterial wilt diseases than that to the other disease.They were Quanshu 860,Quanshu854,Jinshan93,Rongxuan 416,Jinshan 908,Guangshu88- 70 and Quanshu853.The four control varieties of Fushu87,Linsi No.2,Jinshan57 and Zhan 93-16 have single resistance to one disease or one strain.