ADRIANI, O (reprint author), IST NAZL FIS NUCL, SEZIONE FIRENZE, I-50125 FLORENCE, ITALY.
We present a study of the inclusive eta-production based on 300 000 hadronic Z0 decays. The measured inclusive momentum distribution can be reproduced by parton shower Monte Carlo programs and also by an analytical QCD calculation. Comparing our results with low energy e+ e- data, we find that QCD describes both the shape and the energy evolution of the eta-spectrum. The comparison of eta-production rates in quark- and gluon-enriched jet samples does not show statistically significant evidence for more abundant production of eta-mesons in gluon fragmentation.