Population sampling
We have conducted field investigations of Cerasus serrulataaccording to specimen and literature records since 2010, and a total of
18 populations of Cerasus serrulata with 327 accessions have been
collected (Table 1, Figure 1). Among them, seventeen populations were
from China and one was from Korea. Green, young and healthy leaves were
gathered from individuals at least 30 m apart, and were quickly stored
in silica gel. All accessions were used for cpDNA analysis, while 174
were used for ITS analysis, with a maximum accession number of 10 for
each population (Table 1 ). The whole collections should have covered
the most of the distributions of Cerasus serrulata .