Identification of seeds and mislabeled samples from seed banks
Considering that the rice-specific barcode resolved almost all rice
species, we used it to identify 53 accessions of seeds from seed banks
or field collections. Nine (17%) mislabeled samples were found (Fig.
S6). These samples were all from species-rich genome types Aand C . This was not surprising, as in the A genome
type, there is still some confusion between O. rufipogon andO. nivara , and between O. glaberrima (O. barthii )
and O. glumipatula . Similarly, in the C genome type,
there is confusion between diploid and tetraploid O. punctata ,
and among tetraploid O. alta , O. latifolia , and O.
minuta .