Document Detail


The desynaptic mutant of maize as a combined defect of synaptonemal complex and chiasma maintenance.
MedLine Citation:
PMID:  1778469     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The phenotype of the desynaptic (dy) mutant of maize in microsporocytes at meiotic prophase was compared with normal microsporocytes of a closely related strain and with microsporocytes of a maize inbred line (KYS) assumed to be normal. Strikingly more univalents and open arms of bivalents were found in the mutant cells than in normal cells at diakinesis, and where there was heterozygosity for a distal knob (heterochromatic region), separation was usually equational, indicating the occurrence of normal crossing-over followed by failure of chiasma maintenance in the mutant. Differences found in the mutant by electron microscopy were a statistically significant wider dimension of the synaptonemal complex central region and also less twisting of synapsed configurations at pachytene. It is suggested that these are side-effect symptoms of a defect in the synaptonemal complex (or associated substance), which is expressed later as sporadic loss of chiasma maintenance.
Authors:
M P Maguire; A M Paredes; R W Riess
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Genome / National Research Council Canada = Génome / Conseil national de recherches Canada     Volume:  34     ISSN:  0831-2796     ISO Abbreviation:  Genome     Publication Date:  1991 Dec 
Date Detail:
Created Date:  1992-03-09     Completed Date:  1992-03-09     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8704544     Medline TA:  Genome     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  879-87     Citation Subset:  IM    
Affiliation:
Department of Zoology, University of Texas, Austin 78712.
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MeSH Terms
Descriptor/Qualifier:
Microscopy, Electron
Mutation*
Phenotype
Synaptonemal Complex*
Zea mays / genetics*,  ultrastructure
Grant Support
ID/Acronym/Agency:
GM 19582/GM/NIGMS NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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