Seed acquisition
Fifty-three seed accessions, including three accessions ofLeersia , were acquired from seed banks or collected from the
field (Table 1). They proceeded mostly (41 accessions) from the
International Rice Research Institute in the Philippines. Six accessions
could not be traced to a particular source and three accessions were
collected during our field
expedition.
Voucher specimens of these samples were deposited in the herbarium of
the Institute of Botany, Chinese Academy of Sciences. Based on their
names or field identification, the rice samples belonged to 25 species.