Abstract: A cross was made between ERINMO 14 and OGIDE DWARF representing a cross between a cultivar with brown caryopsis and another with white caryopsis, respectively. The F1 seeds were brown showing dominace of the brown character state. Results from the F2 show that caryopsis colour is conditioned by a set of duplicate genes giving rise to 5 character states: Dark brown, brown, light-brown, dirty white and pure white. These character states can be explained on the basis of duplicate gene interaction with dosage effect. The ripened-hull colouration was found to be dependent on colour of the caryopsis such that spikelets with brown caryopses had brown ripened-hull while spikelets with white caryopses had straw ripened-hull. The implication of these findings for rice improvement are discussed.
A.O. Ayoola and J.O. Faluyi , 2007. Inheritance of Caryopsis/Ripened-Hull Colour in a Selection from Land Races of Rice Oryza sativa (Linn). Agricultural Journal, 2: 412-414.