Abstract: In this study，three self-crossed eggplant lines that vary significantly in fruit shape 106（Oblate），114（Short barrel）and 111（Long tube）were used as materials. Artificial measurement and computer photograph analysis were used to obtain fruit shape index and fruit shape triangle index. The inheritance of fruit shape was investigated by a joint segregation analysis of P1，P2，F1，B1，B2 and F2 generations. The results showed that fruit shape index in F2 segregation population of two hybrid crosses（106 × 114，114 × 111）and fruit shape triangle index in F2 segregation population of hybrid crossⅠfit single peak skewed distribution. The results proved that fruit shape trait is quantitative trait and it was controlled by main genes. The inheritance of eggplant fruit shape fit one additive major gene + additive-dominant polygene model（D-2 model）. The highest major gene heritability was in F2 population and the highest polygene heritability was in B2 population. In summary，eggplant fruit shape trait was controled by polygenes，the highest fruit shape selection efficiency was in F2.

Key words: eggplant, fruit shape, inheritance, quantitative trait