Transposons drive sex chromosome evolutionm in Fort Worth

Yongfang Li Department of Biochemistry and Molecular Biology, Oklahoma State University for her reviewing of this manuscript and constructive comments. Dev Dyn — Male- and female-derived genomic probes hybridized together for each karyomorph.

In this article, we review the current status of this field, and based on preliminary evidence, we posit that repetitive sequences are involved in sex chromosome evolution probably via epigenetic modification, such as DNA and histone methylation, with small interfering RNAs as the mediator.

transposons drive sex chromosome evolutionm in Fort Worth

These findings are indicative of ongoing evolutionary processes driving the divergence and possibly also speciation within H. Genome Res — Finally, it is worth mentioning that B-derived gDNA probe displayed strong binding to this region on both X and Y in the inter-karyomorph experiment see Figures 2F—Hsuggesting certain degree of shared sequences, but the extent of overlap with C-derived probe was not absolute.

In each experiment, both genome-derived probes showed rather equal binding to all chromosomes, with preferential localization in the centromeric and pericentromeric regions of most chromosomes and in terminal parts of some of them yellow signals, i.

Cross-species chromosome painting tracks the independent origin of multiple sex chromosomes in two cofamiliar Erythrinidae fishes. In addition, the male-specific region on the nascent Y chromosome of this karyomorph displayed some affinity to B-derived male probe, despite being preferentially labeled with the F-male specific one Figures 2N,O.

However, although in karyomorph C, a slight binding preference for the male-derived probe to the pericentromeric region of Y chromosome was observed, our CGH data did not reveal any conspicuous Y-specific region in the neo-sex chromosome system of karyomorph D.

Вопрос этом transposons drive sex chromosome evolutionm in Fort Worth

Genomics 37— The outstanding pace of sex chromosome turnover is, however, commonly observable also in other cold-blooded vertebrates such as amphibians and reptiles, hence a number of alternative hypotheses about the evolutionary forces standing behind this phenomenon have already been proposed for recent reviews and in depth discussion, see Mank and Avise, ; Kitano and Peichel, ; Kikuchi and Hamaguchi, ; Bachtrog et al.

Occurrence of natural hybrids among sympatric karyomorphs in Hoplerythrinus unitaeniatus Characiformes, Erythrinidae. Chromosome studies of European cyprinid fishes: cross-species painting reveals natural allotetraploid origin of a Carassius female with chromosomes.

This article was submitted to Evolutionary and Population Genetics, a section of the journal Frontiers in Genetics. Among them, the genomic in situ hybridization GISH and comparative genomic hybridization CGH , originally developed for clinical studies Kallioniemi et al.

Chromosoma — Similarities and differences in the nuclear genome organization within Pooideae species revealed by comparative genomic in situ hybridization GISH. Curr Biol — Y fuse?

Transposons drive sex chromosome evolutionm in Fort Worth

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  • Keywords: fish cytogenetics, multiple sex chromosomes, These findings are indicative of ongoing evolutionary processes driving the divergence and possibly Finally, it is worth mentioning that B-derived gDNA probe displayed microsatellite motifs and retrotransposons (RTEs) (Freitas et al., PDF | Sex chromosomes of mammals and most birds are heteromorphic, while those of Phylogeny, transposable element and sex chromosome evolution of the basal lineage of birds These hypotheses concern the major forces driving t​he different tempo of sex It is worth noting that we also dated two.
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  • Classic theory proposes that sex chromosomes evolve from a specific pair of Accumulation of repetitive sequences, mostly transposable elements and tandem However, it is worth noting that small MSY regions do not always represent They also considered retrotransposons an ideal driving force of. chromosomes and the selective forces driving their evolution. Key words: which to study the genetics and evolution of sex chromosomes worth, ), as a result of recombination suppression around mutations are caused by transposable element insertions Pearl, M. S. Kim, J. W. Charlton, J. I. Stiles, F. T. Zee, A. H.
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