title: Abnormalities of spindle and cytokine behavior leading to the formation of meiotic restitution nuclei in intergeneric cereal hybrids
abstract: Mobile stages of meiosis have been analysed by visualizing the spindle in fertile cereal F1 hybrids. We describe four different mechanisms of the formation of restitution nuclei in meiotic division: (1) centripetal migration of telophase chromosome groups from the poles of a curved spindle at early telophase; (2) centripetal migration of the chromosome groups at late telophase when cell plate formation has failed; (3) preferable migration of univalents to one of the poles although spindle appearance is morphologically normal; and (4) in the absence of chromosome segregation where kinetochore fibers have failed to form. Copyright 1999 Academic Press.
authors.affiliation: Department of Cell Differentiation, Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia.
authors.initials: N
authors.lastname: Shamina
authors.initials: N
authors.lastname: Dorogova
authors.initials: N
authors.lastname: Goncharov
authors.initials: A
authors.lastname: Orlova
authors.initials: S
authors.lastname: Trunova