Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
; CCAST, World Lab, Beijing 100080, Peoples R China
Q(2)-evolution of the Bjorken sum rule in the resonance region is studied. The roles of the Roper resonance N*(1440) estimated by the constituent quark model and by the hybrid model are stressed. Moreover, the Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule contributed by the resonances is also discussed.