Abstract:
In the analysis of inherence of six pigmented characters viz : coleoptile
leaf.sheath, iigule, auricle, leaf-tip and node in a rice cross -T-l41-x K-44-1 two
to five genes with differrent modes of action such as complementary, duplicate,
inhibitory, anti-inhibitory etc. were involved in determining pigment in them as
suggested by the unusual ratios which are reported for the first time. Two
pleiotropic genes such PS one basic complementary gene and another inhibitor
have been discovered. Linkage between the pleiotropic inhibitory gene and the
inhibitory gene for purple pigment in ligule has been detected with a cross-over
value of about 21 per cent. These two linked genes have not been referred to
previous'}/ by Ramiah (iv!53) Jodon (!c>56), Takahashi (1964 and Misro et al.
(1966) who attempted to formulate linkage groups in rice.