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ABNORMALITIES OF SPINDLE AND CYTOKINE BEHAVIOR LEADING TO THE FORMATION OF MEIOTIC RESTITUTION NUCLEI IN INTERGENERIC CEREAL HYBRIDS
Author(s) -
Shamitalia,
Dorogova Natalia,
Goncharov Nicolay,
Orlova Albina,
Trunova Svetlana
Publication year - 1999
Publication title -
cell biology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.932
H-Index - 77
eISSN - 1095-8355
pISSN - 1065-6995
DOI - 10.1006/cbir.1999.0483
Subject(s) - telophase , meiosis , restitution , multipolar spindles , microbiology and biotechnology , biology , anaphase , chromosome segregation , chromosome , spindle apparatus , cell division , genetics , cell , gene , political science , law
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.