3 Results
All 33 SSR loci exhibited polymorphism among the six Oryza types,
resulting in the identification of a total of 621 alleles. The genotypic
linkage disequilibrium between loci did not reveal significant values
(P >0.05), implying the absence of linkage
disequilibrium among loci. Among the Oryza types, RM426 was the
most variable locus with 61 alleles, whereas RM477 displayed only 5
alleles, with an average of 18.18 alleles per locus (data not shown).
The highest genetic diversity was found in O. rufipogon(H E=0.639), while O. nivara recorded the
lowest (H E=0.539) (Table S6). Moreover, a high
level of private alleles was observed in the O. rufipogon .
Overall, the genetic parameters revealed a considerable genetic
diversity among all Sri Lankan Oryza lineage (the averageH E of all Oryza types was 0.587, was
1.287, Table S6), which was not evenly distributed across the differentOryza types (the table of allelic frequencies of each population
is available upon request).
Tables S6
Considerably low genetic differentiation was observed among cultivatedOryza types indicating a close genetic relationship (Table S5).
Initially, inbred, feral, and landraces were collectively clustered as a
cultivated rice group, given the observed genetic similarity among these
subgroups. Further, wild rice types, such as O. nivara andO. rufipogon , were categorized as the wild rice group, based on
their distinct genetic differentiation. Additionally, the weedy rice
populations were classified as the weedy rice group.