  We present evidence for leading particle production in hadronic decays of the
Z0 boson to light-flavor jets. A polarized electron beam was used to tag quark
and antiquark jets, and a vertex detector was employed to reject heavy-flavor
events. Charged hadrons were identified with a Cherenkov ring imaging detector.
In the quark jets, more high-momentum p, Lambda, K-, and anti-K*0 were observed
than their antiparticles, and vice versa for antiquark jets, providing direct
evidence that the higher-momentum particles in jets are more likely to carry
the primary quark or antiquark from the Z0 decay, and that s-s(bar) production
is suppressed in fragmentation.
