The effectiveness of visual discrimination for seed yield was studied
in pearl millet (Pennisteum glaucum). Results indicated that it is pos
sible to visually discriminate the lines for seed yield in case the di
fferences among them were large but not when such differences were sma
ll. Plots intermediate in yield were more prone to misjudgment during
visual evaluation in comparison to high or low-yielding ones. The obse
rver's perception of yield was influenced by plant height and earlines
s resulting into overestimation of actual yield for certain plots and
underestimation for others. In general, correctly classified lines wer
e taller, while no particular trend was observed with respect to earli
ness.