SELFING RATES OF PEARL-MILLET (PENNISETUM-TYPHOIDES STAPF AND HUBB) UNDER NATURAL CONDITIONS

The selfing rate of pearl millet (Pennisetum typhoides Stapf and Hubb.) has been determined under natural conditions. This species is said to be allogamous. Nine test plants homozygous for a particular allele on the alcohol dehydrogenase: ADH A locus (A1A1) were sown 2.5 m one from each other interspersed among 300 plants homozygous for the same locus (A2A2); these nine plants served as indicators of selfing. In the 20 spikes produced by these a test plants, the selfing rates varied between 2.2% and 21.7%. Selfing rates were not significantly different within spikes of the same plant, except for one individual. There was no significant correlation between the rate of selfing and the density of the pollen shadow (estimated from the number of spikes producing pollen during the female phase of test plants) or variation in protogyny.