  Microscopic studies in heavy nuclei are very scarce due to large valence
spaces involved. This computational problem can be avoided by means of the use
of symmetry based models. Ground-state, gamma and beta-bands, and their B(E2)
transition strengths in 160-168Dy isotopes, are studied in the framework of the
pseudo-SU(3) model which includes the preserving symmetry Q.Q term and the
symmetry-breaking Nilsson and pairing terms, systematically parametrized.
Additionally, three rotor-like terms are considered whose free parameters,
fixed for all members of the chain are used to fine tune the moment of inertia
of rotational bands and the band-head of gamma and beta-bands. The model
succesfully describes in a systematic way rotational features in these nuclei
and allows to extrapolate toward the midshell nucleus 170Dy. The results
presented show that it is possible to study full chain of isotopes or isotones
in the region with the present model.
