ITS sequence of Ddl-Dd8 populations of sweetpotato stem nematode from China was 727bp, whereas the Dd9-Dd10 isolates was about 915bp.

• 山东沂水群体序列长度为915bp；江苏铜山群体序列长度为914bp。 8个甘薯茎线虫群体之间相似性高达98.；9%25;