Characterization of the diffuse stage in the male meiotic prophase and karyotype of Scapteriscus borellii (Orthoptera: Grylloidea)

Genetica ◽  
1986 ◽  
Vol 71 (1) ◽  
pp. 23-29 ◽  
Author(s):  
H. Cardoso ◽  
M. Stoll ◽  
A. Dutra ◽  
G. Oliver ◽  
M. V. Di Tomaso
Keyword(s):  
Meiotic Prophase ◽  
Diffuse Stage

scholarly journals Characterization of cDNAs Induced in Meiotic Prophase in Lily Microsporocytes

DNA Research ◽  
1994 ◽  
Vol 1 (1) ◽  
pp. 15-26 ◽  
Author(s):  
T. Kobayashi ◽  
E. Kobayashi ◽  
S. Sato ◽  
Y. Hotta ◽  
N. Miyajima ◽  
...  
Keyword(s):  
Meiotic Prophase

scholarly journals Characterization of Spo11-dependent and independent phospho-H2AX foci during meiotic prophase I in the male mouse

2007 ◽  
Vol 120 (10) ◽  
pp. 1733-1742 ◽  
Author(s):  
A. Chicheportiche ◽  
J. Bernardino-Sgherri ◽  
B. de Massy ◽  
B. Dutrillaux
Keyword(s):  
Meiotic Prophase ◽  
Male Mouse ◽  
Prophase I ◽  
Meiotic Prophase I

Chromosomal synapsis and the meiotic process in male mesquite lizards, Sceloporus grammicus complex

Genome ◽  
1992 ◽  
Vol 35 (3) ◽  
pp. 398-408 ◽  
Author(s):  
Kent M. Reed ◽  
Jack W. Sites Jr. ◽  
Ira F. Greenbaum
Keyword(s):  
Synaptonemal Complex ◽  
Sex Chromosomes ◽  
Meiotic Prophase ◽  
Morphological Characterization ◽  
Autosomal Bivalents ◽  
Meiotic Process ◽  
Low Levels ◽  
Sceloporus Grammicus ◽  
Metaphase I

Meiosis in males of the F5 cytotype of Sceloporus grammicus was examined through the analysis of synaptonemal complexes (SCs), diakinetic (metaphase I) nuclei, and secondary spermatocytes (metaphase II configurations). These data allowed the establishment of criteria for substaging of zygonema and pachynema, morphological characterization of the SC complement, and comparison of the orientation and segregation of the autosomes and sex chromosomes. The analysis of nuclei from all stages of meiotic prophase I (leptonema through diakinesis) provided a useful means of partitioning the temporal sequence of early meiotic events. Three substages of zygonema (Z1–Z3) were established, based on the extent of synapsis of the microchromosomal and macrochromosomal elements. Synaptic initiation of the autosomes and sex chromosomes was synchronous. Two patterns of macrochromosomal synapsis were observed. Whereas synapsis of the biarmed elements was biterminal (i.e., progressing from both ends of the homologs), synapsis of the acrocentric elements was uniterminal involving only the distal (noncentromeric) ends of the homologs. Unique sex-chromosomal characteristics were not observed in S. grammicus and, therefore, the substaging of pachynema was based on subjective criteria. Examination of diakinesis – metaphase I and metaphase II configurations indicated low levels of diakinetic irregularities with balanced segregation of the autosomal bivalents and the sex-chromosomal trivalent.Key words: Sceloporus grammicus, meiosis, synaptonemal complex, substaging.

Characterization of fission yeast meiotic mutants based on live observation of meiotic prophase nuclear movement

Chromosoma ◽  
2000 ◽  
Vol 109 (1-2) ◽  
pp. 103-109 ◽  
Author(s):  
Yasushi Hiraoka ◽  
Da-Qiao Ding ◽  
Ayumu Yamamoto ◽  
Chihiro Tsutsumi ◽  
Yuji Chikashige
Keyword(s):  
Fission Yeast ◽  
Meiotic Prophase ◽  
Nuclear Movement ◽  
Meiotic Mutants

The timing and RNA transcription of the diffuse stage of meiotic prophase in the male cricket

Chromosoma ◽  
1984 ◽  
Vol 90 (5) ◽  
pp. 349-354 ◽  
Author(s):  
Horacio Cardoso ◽  
Andrea Peceli ◽  
Amalia Dutra ◽  
M. Cristina Mazzella
Keyword(s):  
Meiotic Prophase ◽  
Rna Transcription ◽  
Diffuse Stage ◽  
Male Cricket

scholarly journals A General Method for Identifying Recessive Diploid-Specific Mutations in Saccharomyces cerevisiae, Its Application to the Isolation of Mutants Blocked at Intermediate Stages of Meiotic Prophase and Characterization of a New Gene SAE2

Genetics ◽  
1997 ◽  
Vol 146 (3) ◽  
pp. 797-816 ◽  
Author(s):  
Andrew H Z McKee ◽  
Nancy Kleckner
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Meiotic Prophase ◽  
Temperature Sensitive ◽  
Yeast Saccharomyces Cerevisiae ◽  
New Approach ◽  
Strand Breaks ◽  
Recessive Mutations ◽  
New Genes ◽  
New Gene

We describe a general new approach for identifying recessive mutations that affect diploid strains of yeast Saccharomyces cerevisiae and the application of this method to the identification of mutations that confer an intermediate block in meiotic prophase chromosome metabolism. The method uses a temperature-sensitive conjugation mutation ste7-1 in combination with homothallism. The mutations of interest confer a defect in spore formation that is dependent upon a gene required for initiation of meiotic recombination and development of meiosis-specific chromosome structure (SPO11). Identified in this screen were null mutations of the DMC1 gene, nonnull mutations of RAD50 (rad50S, and mutations in three new genes designated SAE1, SAE2 and SAE3 (Sporulation in the Absence of Spo Eleven). Molecular characterization of the SAE2 gene and characterization of meiotic and mitotic phenotypes of sae2 mutants are also presented. The phenotypes conferred by a sae2 null mutation are virtually indistinguishable from those conferred by the previously identified nonnull mutations of RAD50 (rad50S). Most notably, both mutations confer only weak sensitivity to the radiomimetic agent methyl methane sulfonate (MMS) but completely block resection and turnover of meiosis-specific double-strand breaks. These observations provide further evidence that this constellation of phenotypes identifies a specific molecular function.

scholarly journals Temporal Characterization of Homology-Independent Centromere Coupling in Meiotic Prophase

PLoS ONE ◽  
2010 ◽  
Vol 5 (4) ◽  
pp. e10336 ◽  
Author(s):  
David Obeso ◽  
Dean S. Dawson
Keyword(s):  
Meiotic Prophase
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