Landscapes drive the dispersal of Monochamus alternatus, vector of the pinewood nematode, revealed by whole-genome resequencing

13 S.

e-journal

200211178

Pine wilt disease (PWD), Bursaphelenchus xylophilus, is an extremely threatening invasion forest disease throughout the world, especially in Asia. B. xylophilus is spread in Asia by vector beetles of Monochamus alternatus, which has long no effective control method. Understanding of landscape effects on the dispersal and
outbreaks of forest pests is crucial to establishing effective ecological control strategies. Here, we analyzed the
samples of M. alternatus collected in a fine-scale in order to estimate the effects of landscape types on the genetic structure and dispersal of M. alternatus. The landscapes included the geographical scales, forest types and land uses. The individuals of M. alternatus were genotyped by using whole-genome resequencing. Population genetic structures were clearly differentiated at the range of 250 kms, suggesting the intermediate scale is an effective barrier against natural dispersal of M. alternatus.