Covariation of Synaptonemal Complex Length and Mammalian Meiotic Exchange Rates

Science ◽  
2002 ◽  
Vol 296 (5576) ◽  
pp. 2222-2225 ◽  
Author(s):  
A. Lynn
Keyword(s):  
Exchange Rates ◽  
Synaptonemal Complex ◽  
Complex Length

The relationship between synaptonemal complex length and genome size in four vertebrate classes (Osteicthyes, Reptilia, Aves, Mammalia)

1994 ◽  
Vol 2 (2) ◽  
pp. 153-162 ◽  
Author(s):  
Daniel G. Peterson ◽  
Stephen M. Stack ◽  
Joseph L. Healy ◽  
Bryon S. Donohoe ◽  
Lorinda K. Anderson
Keyword(s):  
Synaptonemal Complex ◽  
Genome Size ◽  
The Relationship ◽  
Complex Length

Complete meiotic pairing of crested newt chromosomes

Genome ◽  
1995 ◽  
Vol 38 (6) ◽  
pp. 1105-1111 ◽  
Author(s):  
H. Wallace ◽  
B. M. N. Wallace
Keyword(s):  
Synaptonemal Complex ◽  
Genome Size ◽  
Chromosome Pairing ◽  
Meiotic Pairing ◽  
Homologous Chromosomes ◽  
Direct Observations ◽  
Crested Newt ◽  
The Individual ◽  
Complex Length ◽  
Complex Genome

The longest chromosome (number 1) of Trituturus cristatus carries a heteromorphic segment, a heterozygosity perpetuated by a balanced lethal system. The heteromorphic segment is regarded as achiasmate and has been claimed to be asynaptic. Direct observations of chromosome pairing in spermatocytes and oocytes yield some cases where all homologous chromosomes appear to be completely paired, but the individual bivalents could not be identified as pachytene is not particularly clear in this species. The long arms of bivalent 1 usually remain attached by a terminal chiasma in spermatocytes of T. c. cristatus but the corresponding chiasma is only rarely present in T. c. carnifex spermatocytes. Synaptonemal complexes have been measured in both spermatocytes and oocytes of T. c. cristatus. A karyotype constructed from these measurements matches the main features of somatic and lampbrush chromosome karyotypes, indicating that all chromosomes must be completely paired and proportionately represented as synaptonemal complex. The total length of synaptonemal complex is much the same in spermatocytes and oocytes and is similar to the length in spermatocytes of Xenopus laevis. These two amphibian examples supplement a recent survey of other vertebrate classes to reinforce its conclusion that synaptonemal complex length is not related to genome size in vertebrates.Key words: chromosome pairing, synaptonemal complex, genome size, amphibia.

Recombination correlates with synaptonemal complex length and chromatin loop size in bovids—insights into mammalian meiotic chromosomal organization

Chromosoma ◽  
2017 ◽  
Vol 126 (5) ◽  
pp. 615-631 ◽  
Author(s):  
Aurora Ruiz-Herrera ◽  
Miluse Vozdova ◽  
Jonathan Fernández ◽  
Hana Sebestova ◽  
Laia Capilla ◽  
...  
Keyword(s):  
Synaptonemal Complex ◽  
Chromatin Loop ◽  
Chromosomal Organization ◽  
Loop Size ◽  
Complex Length

scholarly journals Crossover frequency and synaptonemal complex length: their variability and effects on human male meiosis

2006 ◽  
Vol 12 (2) ◽  
pp. 123-133 ◽  
Author(s):  
M. Codina-Pascual ◽  
M. Campillo ◽  
J. Kraus ◽  
M.R. Speicher ◽  
J. Egozcue ◽  
...  
Keyword(s):  
Synaptonemal Complex ◽  
Male Meiosis ◽  
Crossover Frequency ◽  
Human Male ◽  
Complex Length

KARYOTYPE, SYNAPTONEMAL COMPLEXES AND POSSIBLE RECOMBINATION NODULES OF THE OOMYCETE FUNGUS SAPROLEGNIA

1982 ◽  
Vol 24 (4) ◽  
pp. 385-396 ◽  
Author(s):  
Kenji Tanaka ◽  
I. Brent Heath ◽  
Peter B. Moens
Keyword(s):  
Synaptonemal Complex ◽  
Nuclear Dna ◽  
Central Element ◽  
Nuclear Dna Content ◽  
Mean Value ◽  
Synaptonemal Complexes ◽  
Recombination Nodules ◽  
Section Electron ◽  
Serial Section Electron Microscopy ◽  
Complex Length

Pachytene nuclei of the fungus Saprolegnia ferax (Gruith.) Thuret were analyzed by serial section electron microscopy. These nuclei contained 21 synaptonemal complexes, all of which terminated at both ends on the nuclear envelope. These complexes range from 1.6 μm to 5.5 μm in length and are composed of two rather diffuse lateral elements, lack a continuous central element and contain discontinuous central nodes. These nodes occur at about 1 per μm of synaptonemal complex length, have a diameter of approximately 50 nm, are predominantly short (<200 nm) and appear to occur as multiples of a basic 50 nm length. These nodes are in many respects similar to previously reported recombination nodules. The complexes were not seen to form a bouquet stage. Based on nuclear DNA content and synaptonemal complex length, the chromosomes are calculated to contain 2C values of between 5.2 and 17.3 fg of DNA, with a mean value of 9.3 fg. Thus it seems that Saprolegnia has large chromosomes relative to other fungi and a haploid complement of 21.

scholarly journals Synaptonemal Complex Length Variation in Wild-Type Male Mice

Genes ◽  
2010 ◽  
Vol 1 (3) ◽  
pp. 505-520 ◽  
Author(s):  
Neil M. Vranis ◽  
Godfried W. Van der Heijden ◽  
Safia Malki ◽  
Alex Bortvin
Keyword(s):  
Synaptonemal Complex ◽  
Length Variation ◽  
Male Mice ◽  
Wild Type ◽  
Wild Type Male ◽  
Complex Length

scholarly journals Sexual dimorphism of synaptonemal complex length in threespine stickleback fish

2020 ◽  
Author(s):  
Barquiesha S Madison ◽  
Mary K Flanagan ◽  
Shivangi Nath ◽  
Michael A White
Keyword(s):  
Synaptonemal Complex ◽  
Gasterosteus Aculeatus ◽  
Threespine Stickleback ◽  
Crossover Frequency ◽  
Late Pachytene ◽  
Length Difference ◽  
Mechanistic Basis ◽  
Axis Length ◽  
Chromosome Axis ◽  
Complex Length

Crossover frequency often differs substantially between sexes (i.e. heterochiasmy). Although this phenomenon is widespread throughout taxa, the mechanisms that lead to heterochiasmy remain unclear. One pattern that has emerged is that the overall length of the synaptonemal complex likely has a direct influence on the total number of crossovers in each sex. However, this has only been investigated in a handful of species. The threespine stickleback fish (Gasterosteus aculeatus) is an excellent species to explore whether synaptonemal complex length is associated with a difference in the total number of crossovers, as females have longer linkage maps than males. We used immunocytogenetics to quantify synaptonemal complex length in late pachytene female and male meiocytes. We found that females had synaptonemal complexes that were 1.65 times longer than males, which is remarkably similar to the length difference observed in a sex-specific linkage map constructed from a cross between two other populations. Our results support a model where chromosome axis length determines overall crossover frequency and establish the threespine stickleback as a useful species to explore the mechanistic basis of heterochiasmy.

The relationship between genome size and synaptonemal complex length in higher plants

1985 ◽  
Vol 156 (2) ◽  
pp. 367-378 ◽  
Author(s):  
L ANDERSON ◽  
S STACK ◽  
M FOX ◽  
Z CHUANSHAN
Keyword(s):  
Synaptonemal Complex ◽  
Genome Size ◽  
Higher Plants ◽  
The Relationship ◽  
Complex Length
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