We compared the genetic structures of overwintered indigenous Korean and Chinese populations. The eight Koreanpopulations consisted of 33 haplotypes, and 16 haplotypes were newly identified. The genetic diversity of the Koreanpopulation revealed high haplotype diversity and low nucleotide diversity of 0.86 and 0.0024 on average, respectively,due to the high dispersal ability, which is similar to that of the Chinese population (Sun et al., 2015). Comparison with30 Chinese populations using a population tree showed that the Korean populations grouped with 12 Chinese populationsand that 67% were located near Jiangsu province. Moreover, the three frequent migration regions by migratory SBPH,including the Buan, Shinan and Taean counties, were grouped together with high supporting values. These results mightsupport the presence of gene flow between the Korean and Chinese populations by migratory SBPHs.

• Deok Ho Kwon(Research Institute of Agriculture and Life Sciences, Seoul National University)
• In-Hong Jeong(Division of Crop Protection, National Institute of Agricultural Science, Rural Development Administration)
• Si Woo Lee(Crop Environment Research Division, National Institute of Crop Science, Rural Development Administration)
• Si Hyeock Lee(Department of Agricultural Biotechnology, Seoul National University)