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Meiosis: Disentangling polyploid chromosomes with supercharged crossover interference
Current Biology, 2021Meiosis depends on the cell's ability to match each chromosome to its homolog in a strictly pairwise fashion. A new study describes an elegant mechanism that tetraploid Arabidopsis arenosa plants evolved to faithfully connect and segregate pairs of homologous chromosomes.
Meret, Arter, Scott, Keeney
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Homologous chromosome pairing is completed in crossover defective atzip4 mutant
Biochemical and Biophysical Research Communications, 2008In transposon-tagged lines of Arabidopsis, we found a mutant that was defective in meiotic chromosome segregation. This mutant, named atzip4-4, was due to a novel mutant allele of AtZIP4, which has sequence similarity to yeast ZIP4/SPO22, which codes a ZMM protein that is a proposed unit of the synapsis initiation complex.
Takashi, Kuromori +6 more
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The localized crossover and a new hypothesis of chromosomal interference
Experientia, 1957Die beiDrosophila beobachtete Herabsetzung der Haufigkeit von Doppelaustausch innerhalb von benachbarten Chromosomenabschnitten lasst sich nicht nur durch die klassische Annahme einer gegenseitigen Interferenz zwischen benachbarten crossing-overs erklaren, sondern kann auch durch das Vorkommen von lokalisierten crossing-overs innerhalb von bestimmten ...
E E, SCHULT, C C, LINDEGREN
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Chiasmata, crossovers, and meiotic chromosome segregation.
Advances in genetics, 1997Meiotic recombination events are probably critical for the completion of several meiotic processes. In addition, recombination is likely to be involved in the events that lead up to synapsis of homologues in meiotic prophase. Recombination events that ultimately become resolved as exchanges are needed for the formation of chiasmata.
C A, Bascom-Slack +2 more
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Capacitated lot sizing by using multi-chromosome crossover strategy
Journal of Intelligent Manufacturing, 2008The capacitated lot sizing problem (CLSP) arises when, under capacity constraints, the decision maker has to determine the production schedule and lot sizes that will minimize the total costs involved. The costs considered in this article are order, inventory carrying, and labor costs.
Gürsel A. Süer +2 more
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Non-homologous chromosome pairing and crossover formation in haploid rice meiosis
Chromosoma, 2010While many studies have provided significant insight into homolog pairing during meiosis, information on non-homologous pairing is much less abundant. In the present study, fluorescence in situ hybridization (FISH) was used to investigate non-homologous pairing in haploid rice during meiosis.
Zhiyun, Gong +6 more
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Genomics of adaptive divergence with chromosome‐scale heterogeneity in crossover rate
Molecular Ecology, 2017AbstractGenetic differentiation between divergent populations is often greater in chromosome centres than peripheries. Commonly overlooked, this broadscale differentiation pattern is sometimes ascribed to heterogeneity in crossover rate and hence linked selection within chromosomes, but the underlying mechanisms remain incompletely understood.
Daniel Berner, Marius Roesti
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Temperature regulates negative supercoils to modulate meiotic crossovers and chromosome organization
Science China Life SciencesCrossover recombination is a hallmark of meiosis that holds the paternal and maternal chromosomes (homologs) together for their faithful segregation, while promoting genetic diversity of the progeny. The pattern of crossover is mainly controlled by the architecture of the meiotic chromosomes.
Yingjin, Tan +11 more
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7. Chiasmata, Crossovers, and Meiotic Chromosome Segregation
1997Carol A. Bascom-Slack +2 more
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