A genetic linkage map of sweetpotato Ipomoea batatas(L.)Lam.based on AFLP markers and the localization of stem nematode resistance gene

摘要：

A genetic linkage map of sweetpotato,Ipomoea batatas(L.)Lam.,was constructed using a mapping population consisting of 202 individuals of a cross between“Xu 781and“Xushu 18.A total of 2602 markers,including 2601 AFLP and 1 RAPD markers and one stem nematode resistance gene were used in linkage analysis.The map of Xu 781 is based on 516 single-dose AFLP markers,332 double-dose AFLP markers and 211 double single-dose AFLP markers on 71 linkage groups with an average distance of 5.99 cM between markers.The map of Xushu 18 is based on 478 single-dose AFLP markers,229 double-dose AFLP markers and 269 double single-dose AFLP markers on 63 linkage groups with an average distance of 5.86 cM between markers.The map lengths of Xu 781 and Xushu 18 were estimated as 6339.83 cM and 5718.94 cM,respectively.Two markers,named as E2M23-3 and E2M23-15,respectively,were obtained with the primer pair E2M23,the genetic distance of which to sweetpotato stem nematode resistance gene(Spn)was 2.32 cM and 2.51 cM,respectively.

关键词： Sweetpotato Molecular linkage map Stem nematode resistance gene

作者: Qin Jie Hua Li Ning Zhao Jun Hu Hong Zhai Daifu Ma Qingchang Liu

作者单位: Key Laboratory of Crop Genomics and Genetic Improvement,Ministry of Agriculture,Beijing Key Laborato Xuzhou Sweetpotato Research Center,Xuzhou 221121,China

会议类型: 国际会议

会议名称: 3rd China-Japan-Korea Workshop on Sweetpotato(第三届中日韩甘薯学术研讨会)

会议地点: 北京

会议语种:英文

页码: 349-351

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）