Publication: The synaptic process in Locusta migratoria spermatocytes by synaptonemal complex analysis
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Date
1998
Authors
Molina, J. ; Martínez Flores, I. ; Templado, C, ; García, M. ; Egozcue, J.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
We describe the synaptic process during
meiotic prophase in spermatocytes from Locusta
migratoria, using synaptonemal complex (SC) spreads
analyzed by light (LM) and electron (EM) microscopy.
At leptotene, a stage of short duration, unpaired axial
elements begin to be assembled. Synapsis starts at
zygotene, beginning usually at the terminal regions of
the bivalents, either at the proximal, centromeric end or
at the distal, non-centromeric end; interstitial initiation
of synapsis was only occasionally observed in the longer
chromosomes. Pairing is asynchronous, and shorter
chromosomes are the first to complete synapsis. At
pachytene all bivalents are fully synapsed. Diplotene is
characterized by the progressive fragmentation of SCs;
fragmentation is asynchronous, and affects mainly the
longer chromosomes, while the shorter ones maintain
their morphology up to late diplotene.
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