  We present the results for antineutrino induced quasielastic hyperon
production from nucleon and nuclear targets \cite{Alam:2014bya,Singh:2006xp}.
The inputs are the nucleon-hyperon(N--Y) transition form factors determined
from the analysis of neutrino-nucleon scattering and semileptonic decays of
neutron and hyperons using SU(3) symmetry. The calculations for the nuclear
targets are done in local density approximation. The nuclear medium
effects(NME) like Fermi motion, Pauli blocking and final state interaction(FSI)
effects due to hyperon-nucleon scattering have been taken into account. The
hyperons giving rise to pions through weak decays also contribute to the weak
pion production in addition to the $\Delta$ excitation mechanism which
dominates in the energy region of $<$ 0.7 GeV. We also present the results of
longitudinal and perpendicular components of polarization of final hyperon
\cite{Akbar:2016awk}. These measurements in the future accelerator experiments
with antineutrinos may give some information on axial vector and pseudoscalar
form factors in the strangeness sector.
