Chromosome Dynamics in Meiosis

2007 ◽  
pp. 103-124 ◽  
Author(s):  
Arnaud Ronceret ◽  
Moira J. Sheehan ◽  
Wojciech P. Pawlowski
Keyword(s):  
Chromosome Dynamics

scholarly journals Comparative FISH analysis of Senna tora tandem repeats revealed insights into the chromosome dynamics in Senna

2021 ◽  
Vol 43 (3) ◽  
pp. 237-249 ◽  
Author(s):  
Thanh Dat Ta ◽  
Nomar Espinosa Waminal ◽  
Thi Hong Nguyen ◽  
Remnyl Joyce Pellerin ◽  
Hyun Hee Kim
Keyword(s):  
Tandem Repeats ◽  
Chromosomal Rearrangements ◽  
Organizer Region ◽  
Nucleolar Organizer Region ◽  
Nucleolar Organizer ◽  
Pericentromeric Region ◽  
Its2 Sequence ◽  
Fish Analysis ◽  
Chromosomal Distribution ◽  
Chromosome Dynamics

Abstract Background DNA tandem repeats (TRs) are often abundant and occupy discrete regions in eukaryotic genomes. These TRs often cause or generate chromosomal rearrangements, which, in turn, drive chromosome evolution and speciation. Tracing the chromosomal distribution of TRs could therefore provide insights into the chromosome dynamics and speciation among closely related taxa. The basic chromosome number in the genus Senna is 2n = 28, but dysploid species like Senna tora have also been observed. Objective To understand the dynamics of these TRs and their impact on S. tora dysploidization. Methods We performed a comparative fluorescence in situ hybridization (FISH) analysis among nine closely related Senna species and compared the chromosomal distribution of these repeats from a cytotaxonomic perspective by using the ITS1-5.8S-ITS2 sequence to infer phylogenetic relationships. Results Of the nine S. tora TRs, two did not show any FISH signal whereas seven TRs showed similar and contrasting patterns to other Senna species. StoTR01_86, which was localized in the pericentromeric regions in all S. tora, but not at the nucleolar organizer region (NOR) site, was colocalized at the NOR site in all species except in S. siamea. StoTR02_7_tel was mostly localized at chromosome termini, but some species had an interstitial telomeric repeat in a few chromosomes. StoTR05_180 was distributed in the subtelomeric region in most species and was highly amplified in the pericentromeric region in some species. StoTR06_159 was either absent or colocalized in the NOR site in some species, and StoIGS_463, which was localized at the NOR site in S. tora, was either absent or localized at the subtelomeric or pericentromeric regions in other species. Conclusions These data suggest that TRs play important roles in S. tora dysploidy and suggest the involvement of 45S rDNA intergenic spacers in “carrying” repeats during genome reshuffling.

scholarly journals Measuring chromosome dynamics on different time scales using resolvases with varying half-lives

2005 ◽  
Vol 56 (4) ◽  
pp. 1049-1061 ◽  
Author(s):  
Richard A. Stein ◽  
Shuang Deng ◽  
N. Patrick Higgins
Keyword(s):  
Time Scales ◽  
Chromosome Dynamics ◽  
Different Time Scales

Bacterial Chromosome Dynamics

Science ◽  
2003 ◽  
Vol 301 (5634) ◽  
pp. 780-785 ◽  
Author(s):  
D. J. Sherratt
Keyword(s):  
Bacterial Chromosome ◽  
Chromosome Dynamics

scholarly journals Nuclear Envelope-Associated Chromosome Dynamics during Meiotic Prophase I

2018 ◽  
Vol 5 ◽  
Author(s):  
Xinhua Zeng ◽  
Keqi Li ◽  
Rong Yuan ◽  
Hongfei Gao ◽  
Junling Luo ◽  
...  
Keyword(s):  
Nuclear Envelope ◽  
Meiotic Prophase ◽  
Chromosome Dynamics ◽  
Prophase I ◽  
Meiotic Prophase I

Chromosome dynamics and cellular clocks

Science ◽  
2018 ◽  
Vol 359 (6381) ◽  
pp. 1227.16-1229
Author(s):  
L. Bryan Ray
Keyword(s):  
Chromosome Dynamics

scholarly journals DNA double strand break repair in Escherichia coli perturbs cell division and chromosome dynamics

PLoS Genetics ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. e1008473 ◽  
Author(s):  
Martin A. White ◽  
Elise Darmon ◽  
Manuel A. Lopez-Vernaza ◽  
David R. F. Leach
Keyword(s):  
Escherichia Coli ◽  
Cell Division ◽  
Strand Break ◽  
Double Strand Break ◽  
Double Strand Break Repair ◽  
Chromosome Dynamics ◽  
Dna Double Strand Break ◽  
Break Repair
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