Interrelationships of Subspecies of Oryza Sativa as Revealed by Grain and Embryo Size

Grains of 52 aus, 49 aman and 20 each of japonica and javanica (Indonesian) varieties of rice were scored for length, breadth and thickness of each grain (husked) using a random sample of ten grains per variety. Embryo length and breadth were also measured with the help of an ocular micrometer. Variances for each of the dimensions measured were calculated for all the four groups and compared pairwise to test whether there was any significant difference between these groups. Correlation between the volume of the embryo and the endosperm was tested by working out the coefficient of correlation.