Fifty-two individuals in a population of Abeliophyllum distichum, a monotyp
ic genus endemic to the central Korean Peninsula, were mapped to examine th
e spatial genetic structure using ten alleles of six allozyme loci. Moran's
I values were significantly different from the expected value (E [I] = -0.
02) in 39 of 100 cases and the overall correlogram for six out of 10 allele
s was significant. In the short distance classes (0 < 14 m), 20 positive an
d only five negative on a total of 50 Moran's I values were significantly d
ifferent from the expected value, indicating a genetic similarity among ind
ividuals within the short distances. Although A. distichum has a heterostyl
y-breeding system and a winged fruit (samara) which would be dispersed by w
ind, the spatial genetic structure detected in this study indicated that ge
ne flow would not be extensive in a population of A. distichum because of p
ine forest acting as a shield for wind movement. It is recommended that the
sampling for conservation purposes might be performed at a diameter of mor
e than 16 m to extract the genetic diversity across an entire population.