Evidence that homologous X-chromosome pairing requires transcription and Ctcf protein

2007 ◽  
Vol 39 (11) ◽  
pp. 1390-1396 ◽  
Author(s):  
Na Xu ◽  
Mary E Donohoe ◽  
Susana S Silva ◽  
Jeannie T Lee
Keyword(s):  
X Chromosome ◽  
Chromosome Pairing

scholarly journals HIM-8 Binds to the X Chromosome Pairing Center and Mediates Chromosome-Specific Meiotic Synapsis

Cell ◽  
2005 ◽  
Vol 123 (6) ◽  
pp. 1051-1063 ◽  
Author(s):  
Carolyn M. Phillips ◽  
Chihunt Wong ◽  
Needhi Bhalla ◽  
Peter M. Carlton ◽  
Pinky Weiser ◽  
...  
Keyword(s):  
X Chromosome ◽  
Chromosome Pairing ◽  
Meiotic Synapsis ◽  
Pairing Center

scholarly journals Lack of detectable genetic recombination on the X chromosome during the parthenogenetic production of female and male aphids

2002 ◽  
Vol 79 (3) ◽  
pp. 203-209 ◽  
Author(s):  
DINAH F. HALES ◽  
ALEX C. C. WILSON ◽  
MATHEW A. SLOANE ◽  
JEAN-CHRISTOPHE SIMON ◽  
JEAN-FRANÇOIS LEGALLIC ◽  
...  
Keyword(s):  
X Chromosome ◽  
Chromosome Pairing ◽  
Reproductive Strategies ◽  
Genetic Recombination ◽  
Full Range ◽  
Nucleolar Organizer ◽  
Male Production ◽  
Cyclical Parthenogenesis ◽  
X Chromosomes ◽  
Polymorphic Microsatellite

We used polymorphic microsatellite markers to look for recombination during parthenogenetic oogenesis between the X chromosomes of aphids of the tribe Macrosiphini. We examined the X chromosome because it comprises ∼25% of the genome and previous cytological observations of chromosome pairing and nucleolar organizer (NOR) heteromorphism suggest recombination, although the same is not true for autosomes. A total of 564 parthenogenetic females of Myzus clones with three distinct reproductive modes (cyclical parthenogenesis, obligate parthenogenesis and obligate parthenogenesis with male production) were genotyped at three informative X-linked loci. Also, parthenogenetically produced males from clones encompassing the full range of male-producing reproductive strategies were genotyped. These included 391 Myzus persicae males that were genotyped at three X-linked loci and 538 males from Sitobion clones that were genotyped at five informative X-linked loci. Our results show no departure from clonality in parthenogenetic generations of aphids of the tribe Macrosiphini: no recombinant genotypes were observed in parthenogenetically produced males or females.

Chromosomal fusion and meiotic behaviour in Delena cancerides (Araneae: Sparassidae). I. Chromosome pairing and X-chromosome segregation

Genome ◽  
1991 ◽  
Vol 34 (4) ◽  
pp. 561-566 ◽  
Author(s):  
D. M. Rowell
Keyword(s):  
Synaptonemal Complex ◽  
Chromosome Segregation ◽  
X Chromosome ◽  
Chromosome Pairing ◽  
X Chromosomes ◽  
Translocation Heterozygote ◽  
Complex Translocation ◽  
Monobrachial Homology ◽  
Pairing Initiation ◽  
Surface Spreading

Surface spreading of meiotic material in Delena cancerides indicates that pairing initiation among metacentric chromosomes with monobrachial homology differs from that of telocentric forms and free metacentric bivalents and results in a star-shaped structure at pachytene. Distance cosegregation of the three X chromosomes in ancestral, telocentric forms is prefaced by a centric association early in prophase I. This centric association of the X chromosomes is conserved in metacentric races despite the presence of an X-autosome fusion.Key words: synaptonemal complex, translocation heterozygote, X chromosome, spider.

scholarly journals The pluripotency factor Oct4 interacts with Ctcf and also controls X-chromosome pairing and counting

Nature ◽  
2009 ◽  
Vol 460 (7251) ◽  
pp. 128-132 ◽  
Author(s):  
Mary E. Donohoe ◽  
Susana S. Silva ◽  
Stefan F. Pinter ◽  
Na Xu ◽  
Jeannie T. Lee
Keyword(s):  
X Chromosome ◽  
Chromosome Pairing ◽  
Pluripotency Factor
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