Number of net nucleotide divergence (Da) between populations (above diagonal) and Fst genetic distance between groups (below diagonal) at the Pi-ta region1.

1The lowest Fst values between populations are indicated in bold font. More than one value was bolded if the values are closely similar. Levels of genetic differentiation among population were estimated by Da and Fst using DnaSP 5.10 (www.ub.es/dnasp). Total nine populations were compared with each other. The value close to zero means the least difference between populations. US cultivar (tropical japonica) accessions were not included in the japonica group.2Indicates not applied.