Epigenetics of the Synaptonemal Complex

Hernández‐Hernández, Abrahan; Hernádez, Rosario Ortiz; Vázquez‐Nin, Gerardo H.

doi:10.5772/29752

Meiosis - Molecular Mechanisms and Cytogenetic Diversity 2012

DOI: 10.5772/29752

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Epigenetics of the Synaptonemal Complex

Abrahan Hernández‐Hernández¹,

Rosario Ortiz Hernádez²,

Gerardo H. Vázquez‐Nin³

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2014

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“…The SC forms during prophase I and possesses a tripartite ultrastructural organization with 2 lateral elements and 1 central element. Chromatin is associated with the lateral elements by a series of loops [Zickler and Kleckner, 1999;Page and Hawley, 2004;Yang and Wang, 2009;Hernández-Hernández et al, 2012]. …”

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confidence: 99%

Organization and Behavior of the Synaptonemal Complex during Achiasmatic Meiosis of Four Buthid Scorpions

Schneider

Mattos²,

Carvalho³

et al. 2014

Cytogenet Genome Res

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Testicular cells of 4 buthid scorpions, Rhopalurus agamemnon (2n = 28), R. rochai (2n = 28), Tityus bahiensis (2n = 6), and T. fasciolatus (2n = 14), which show different types of chromosomal configurations in meiosis I, were subjected to cellular microspreading in order to (1) obtain knowledge about the organization and behavior of the synaptonemal complex (SC), and (2) acquire data about the mechanisms responsible for inter- and intraindividual chromosomal variation within Buthidae. Ultrastructural analysis of microspread nuclei revealed SCs with a well-preserved structure until late substages of prophase I, but did not detect kinetochore plates and recombination nodules. Pachytene cells of R. agamemnon, R. rochai and T. bahiensis exhibited single and unsynapsed axes continuous with totally synapsed SCs, indicating the occurrence of heterozygous chromosomal rearrangements. Although chromosome chains were not observed in T. fasciolatus, the presence of gaps and interlocks points out that this species also carries heterozygous rearrangements, involving a small chromosome segment. Especially in R. rochai, the cellular microspreading analysis was useful to clarify the origin of inter- and intraindividual variation in the number of bivalent-like elements and in the number of chromosomes involved in multivalent associations. It was found that more chromosomes were involved in rearrangements than previously established through investigations using light microscopy alone.

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mentioning

confidence: 99%

Organization and Behavior of the Synaptonemal Complex during Achiasmatic Meiosis of Four Buthid Scorpions

Schneider

Mattos²,

Carvalho³

et al. 2014

Cytogenet Genome Res

View full text Add to dashboard Cite

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Epigenetics of the Synaptonemal Complex

Cited by 1 publication

References 47 publications

Organization and Behavior of the Synaptonemal Complex during Achiasmatic Meiosis of Four Buthid Scorpions

Organization and Behavior of the Synaptonemal Complex during Achiasmatic Meiosis of Four Buthid Scorpions

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