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Not AvailableThe inter relationships between the two progenitors is interesting as both wild relatives are known to
be the great untapped gene reservoirs. The debate continues on granting a separate species status to
Oryza nivara. The present study was conducted on populations of Oryza rufipogon and Oryza nivara
from Eastern India employing morphological and molecular characteristics. The cluster analysis of the
data on morphological traits could clearly classify the two wild forms into two separate discrete groups
without any overlaps i.e. lack of intermediate forms, suggesting the non-sympatric existence of the
wild forms. Amplification of hyper variable regions of the genome could reveal 144 alleles suggesting
high genetic diversity values (average He = 0.566). Moreover, with 42.37% of uncommon alleles
between the two wild relatives, the molecular variance analysis (AMOVA) could detect only 21% of total
variation (p < 0.001) among them and rest 59% was within them. The population structure analysis
clearly classified these two wild populations into two distinct sub-populations (K = 2) without any
overlaps i.e. lack of intermediate forms, suggesting the non-sympatric existence of the wild forms. Clear
differentiation into two distinct groups indicates that O. rufipogon and O. nivara could be treated as two
different species.Not Availabl