Male Meiotic Segregation Analyses of Peri- and Paracentric Inversions in the Pig Species

2009 ◽  
Vol 125 (2) ◽  
pp. 117-124 ◽  
Author(s):  
K. Massip ◽  
N. Bonnet ◽  
A. Calgaro ◽  
S. Billoux ◽  
V. Baquié ◽  
...  
Keyword(s):  
Meiotic Segregation ◽  
Paracentric Inversions

The meiotic segregation of paracentric inversions: how breakpoint mapping can make the difference

2008 ◽  
Vol 16 ◽  
pp. s25
Author(s):  
F Pellestor ◽  
S Bhatt ◽  
J Puechberty ◽  
G Lefort ◽  
T Liehr ◽  
...  
Keyword(s):  
Meiotic Segregation ◽  
The Difference ◽  
Breakpoint Mapping ◽  
Paracentric Inversions

scholarly journals Breakpoint mapping and complete analysis of meiotic segregation patterns in three men heterozygous for paracentric inversions

2008 ◽  
Vol 17 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Samarth Bhatt ◽  
Kamran Moradkhani ◽  
Kristin Mrasek ◽  
Jacques Puechberty ◽  
Marina Manvelyan ◽  
...  
Keyword(s):  
Complete Analysis ◽  
Meiotic Segregation ◽  
Breakpoint Mapping ◽  
Paracentric Inversions

scholarly journals CHROMOSOMAL SEQUENCES AND INTERISLAND COLONIZATIONS IN HAWAIIAN DROSOPHILA

Genetics ◽  
1983 ◽  
Vol 103 (3) ◽  
pp. 465-482
Author(s):  
Hampton L Carson
Keyword(s):  
Polytene Chromosomes ◽  
Complex Species ◽  
Hawaiian Drosophila ◽  
On This Island ◽  
Break Points ◽  
Chromosomal Sequences ◽  
Founder Events ◽  
Paracentric Inversions ◽  
Single Set

ABSTRACT Of 103 picture-winged Drosophila species endemic to the high Hawaiian islands, all but three are endemic to single islands or island complexes. They are presumed to have evolved in situ on each island. The banding pattern sequences of the five major polytene chromosomes of these species have been mapped to a single set of Standard sequences. Sequential variation among these chromosomes is due to 213 paracentric inversions. An atlas of their break points is provided. Geographical, morphological and behavioral data may be used to supplement the cytological information in tracing ancestry. Starting at the newer end of the archipelago, the 26 species of the Island of Hawaii (less than 700,000 years old) are inferred to have been derived from 19 founders, 15 from the Maui complex, three from Oahu and one from Kauai. The existence of 40 Maui complex species is explicable as resulting from 12 founders, ten from Oahu and two from Kauai. The 29 Oahu species can be explained by 12 founder events, five from Kauai and seven from Maui complex (summary in Figure 5). Although the ancestry of two Kauai species can be traced to newer islands, the ten remaining ones on this island (age about 5.6 million years) are apparently ancient elements in the fauna, relating ultimately to Palearctic continental sources.

scholarly journals TETRAPLOID STRAINS OF SACCHAROMYCES CEREVISIAE THAT ARE TRISOMIC FOR CHROMOSOME III

Genetics ◽  
1978 ◽  
Vol 89 (4) ◽  
pp. 667-684
Author(s):  
Michael I Riley ◽  
T R Manney
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Computer Simulation ◽  
Meiotic Recombination ◽  
Meiotic Segregation ◽  
Segregation Data ◽  
Strong Interference ◽  
Chromosome Iii ◽  
Double Crossovers

ABSTRACT Meiotic segregation of several genes has been studied in tetraploid strains that are trisomic for chromosome III. The segregation data were compared to a computer simulation that assumes trivalent pairing of homologues involved in exchanges, followed by nonpreferential segregation. Trivalent pairing was characterized by higher frequencies of exchange as compared to bivalent pairing, and by the presence of spores resulting from at least double crossovers involving all three homologues. Trivalent segregation was characterized by a unique recombinant class. The strong interference normally exhibited in diploid meiotic recombination was not evident from the frequency of double crossovers in these strains.

scholarly journals Gene conversion: observations on the DNA hybrid models

1970 ◽  
Vol 15 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Andrzej Paszewski
Keyword(s):  
Experimental Data ◽  
Gene Conversion ◽  
Hybrid Models ◽  
Crossing Over ◽  
Meiotic Segregation ◽  
Tetrad Analysis ◽  
Dna Models ◽  
Complex Picture ◽  
New Hypothesis ◽  
Hybrid Dna

SUMMARYSome features of gene conversion in fungi and their bearing on the hybrid DNA models are discussed. Available experimental data from tetrad analysis seem to give a more complex picture of polarity in intra-genic recombination and of the relations between conversion and post-meiotic segregation, and between conversion and crossing-over, than predicted by the models.A new hypothesis of the mechanism of gene conversion with special attention given to the aspect of asymmetry in this phenomenon is proposed as an alternative to the mechanism suggested by the DNA hybrid models.

Three unrelated cases of paracentric inversions of 1p in individuals with abnormal phenotypes

1994 ◽  
Vol 49 (4) ◽  
pp. 410-413 ◽  
Author(s):  
A. M. Estop ◽  
V. Bansal ◽  
A. Lin ◽  
F. Levinson ◽  
S. M. Karlin ◽  
...  
Keyword(s):  
Paracentric Inversions

scholarly journals Analysis of meiotic segregation by triple-color fish on both total and motile sperm fractions in a t(1p;18) river buffalo bull

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0232592 ◽  
Author(s):  
Chiara Di Dio ◽  
Valentina Longobardi ◽  
Gianluigi Zullo ◽  
Pietro Parma ◽  
Alfredo Pauciullo ◽  
...  
Keyword(s):  
River Buffalo ◽  
Meiotic Segregation ◽  
Motile Sperm

Paracentric Inversions Differentiate the Conservative Karyotypes in Two Centropomus Species (Teleostei: Centropomidae)

2019 ◽  
Vol 157 (4) ◽  
pp. 239-248 ◽  
Author(s):  
Amanda T. Borges ◽  
Marcelo B. Cioffi ◽  
Luiz A.C. Bertollo ◽  
Rodrigo X. Soares ◽  
Gideão W.W.F. Costa ◽  
...  
Keyword(s):  
Economic Value ◽  
5S Rdna ◽  
Chromosomal Evolution ◽  
Chromosomal Mapping ◽  
Rdna Site ◽  
Fluorochrome Staining ◽  
Western Atlantic ◽  
Replication Banding ◽  
Evolutionary Diversification ◽  
Paracentric Inversions

Centropomus is the sole genus of the Centropomidae family (Teleostei), comprising 12 species widely distributed throughout the Western Atlantic and Eastern Pacific, with 6 of them occurring in the Western Atlantic in extensive sympatry. Their life history and phylogenetic relationships are well characterized; however, aspects of chromosomal evolution are still unknown. Here, cytogenetic analyses of 2 Centropomus species of great economic value (C. undecimalis and C. mexicanus) were performed using conventional (Giemsa, Ag-NOR, and fluorochrome staining, C- and replication banding) and molecular (chromosomal mapping of 18S and 5S rDNA, H2A-H2B and H3 hisDNA, and (TTAGGG)n repeats) approaches. The karyotypes of both species were composed of 48 solely acrocentric chromosomes (2n = 48; FN = 48), but the single ribosomal site was located in varying positions in the long arms of the second largest chromosome pair. Replication bands were generally similar, although conspicuous differences were observed in some chromosome regions. In both species, the histone H3 genes were located on 3 apparently homeologous chromosome pairs, but the exact position of these clusters differed slightly. Interspecific hisDNA and rDNA site displacements can indicate the occurrence of multiple paracentric inversions during the evolutionary diversification of the Centropomus genomes. Although the karyotypes remained similar in both species, our data demonstrate an unsuspected microstructural reorganization between them, driven most likely by a series of paracentric inversions.

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