Reduced Rates of Sequence Evolution of Y-Linked Satellite DNA in Rumex (Polygonaceae)

Navajas-Pérez, Rafael; Herrán, Roberto de la; Jamilena, Manuel; Lozano, Rafael; Rejón, Carmelo Ruiz; Rejón, M. Ruíz; Garrido-Ramos, Manuel A.

doi:10.1007/s00239-004-0199-0

Cited by 57 publications

(89 citation statements)

References 35 publications

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“…The evolution of these Y chromosome satellite DNAs in the non-recombining Y of R. acetosa , with a reduced rate of concerted evolution, has produced a diversification of satellite DNAs in different subfamilies and families. Two different subfamilies of the RAYSI satellite DNA are separately located in the two Ys of R. acetosa (Navajas-Perez et al, 2005b, 2006. We have isolated and characterized two other new Y-specific satellite DNA families from the genome of R. acetosa and R. papillaris , which share about 60% sequence homology with RAYSI and are located in different loci along the two Y chromosomes (B. Mariotti, S. Manzano, M. Jamilena, unpublished data).…”

Section: Tandem Satellite Dnamentioning

confidence: 99%

“…1 ). The family RAE180, which is also located in a single autosomal locus, is a major component of both the Y 1 and Y 2 chromosomes (Shibata et al, 2000), while the family RAYSI is specific to the Ys of R. acetosa (Shibata et al, 1999) and other related species with a multiple sex chromosome system (XX/XY 1 Y 2 ), including R. papillari s, R. intermedius , R. thyrsoides and R. tuberosus (Navajas-Perez et al, 2005b, 2006. The evolution of these Y chromosome satellite DNAs in the non-recombining Y of R. acetosa , with a reduced rate of concerted evolution, has produced a diversification of satellite DNAs in different subfamilies and families.…”

Section: Tandem Satellite Dnamentioning

confidence: 99%

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Plant sex chromosomes: molecular structure and function

Jamilena

Mariotti

Manzano³

2008

Cytogenet Genome Res

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Recent molecular and genomic studies carried out in a number of model dioecious plant species, including Asparagus officinalis, Carica papaya, Silene latifolia, Rumex acetosa and Marchantia polymorpha, have shed light on the molecular structure of both homomorphic and heteromorphic sex chromosomes, and also on the gene functions they have maintained since their evolution from a pair of autosomes. The molecular structure of sex chromosomes in species from different plant families represents the evolutionary pathway followed by sex chromosomes during their evolution. The degree of Y chromosome degeneration that accompanies the suppression of recombination between the Xs and Ys differs among species. The primitive Ys of A. officinalis and C. papaya have only diverged from their homomorphic Xs in a short male-specific and non-recombining region (MSY), while the heteromorphic Ys of S. latifolia, R. acetosa and M. polymorpha have diverged from their respective Xs. As in the Y chromosomes of mammals and Drosophila, the accumulation of repetitive DNA, including both transposable elements and satellite DNA, has played an important role in the divergence and size enlargement of plant Ys, and consequently in reducing gene density. Nevertheless, the degeneration process in plants does not appear to have reached the Y-linked genes. Although a low gene density has been found in the sequenced Y chromosome of M. polymorpha, most of its genes are essential and are expressed in the vegetative and reproductive organs in both male and females. Similarly, most of the Y-linked genes that have been isolated and characterized up to now in S. latifolia are housekeeping genes that have X-linked homologues, and are therefore expressed in both males and females. Only one of them seems to be degenerate with respect to its homologous region in the X. Sequence analysis of larger regions in the homomorphic X and Y chromosomes of papaya and asparagus, and also in the heteromorphic sex chromosomes of S. latifolia and R. acetosa, will reveal the degenerative changes that the Y-linked gene functions have experienced during sex chromosome evolution.

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Section: Tandem Satellite Dnamentioning

confidence: 99%

Section: Tandem Satellite Dnamentioning

confidence: 99%

Plant sex chromosomes: molecular structure and function

Jamilena

Mariotti

Manzano³

2008

Cytogenet Genome Res

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“…In fact, according to theoretical models of satellite DNA evolution and given the experimental evidence, any random sequence can lead to a family of tandem repeats. Nevertheless, the sequence relationship between different satellite DNA families found within the same genome is indicative of common origins of currently highly differentiated satellite DNAs [Navajas-Pérez et al, 2005b]. In general, it has been found that satellite repeats are generally AT rich, especially in the case of centromeric satellite DNAs.…”

Section: Satellite Dna a Family Of Sequences That Get On Well With Ementioning

confidence: 99%

Satellite DNA in Plants: More than Just Rubbish

Garrido-Ramos

2015

Cytogenet Genome Res

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151

149

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For decades, satellite DNAs have been the hidden part of genomes. Initially considered as junk DNA, there is currently an increasing appreciation of the functional significance of satellite DNA repeats and of their sequences. Satellite DNA families accumulate in the heterochromatin in different parts of the eukaryotic chromosomes, mainly in pericentromeric and subtelomeric regions, but they also span the functional centromere. Tandem repeat sequences may spread from subtelomeric to interstitial loci, leading to the formation of chromosome-specific loci or to the accumulation in equilocal sites in different chromosomes. They also appear as the main components of the heterochromatin in the sex-specific region of sex chromosomes. Satellite DNA, required for chromosome organization, also plays a role in pairing and segregation. Some satellite repeats are transcribed and can participate in the formation and maintenance of heterochromatin structure and in the modulation of gene expression. In addition to the identification of the different satellite DNA families, their characteristics and location, we are interested in determining their impact on the genomes, by identifying the mechanisms leading to their appearance and amplification as well as in understanding how they change over time, the factors affecting these changes, and the influence exerted by the evolutionary history of the organisms. On the other hand, satellite DNA sequences are rapidly evolving sequences that may cause reproductive barriers between organisms and promote speciation. The accumulation of experimental data collected in recent years and the emergence of new approaches based on next-generation sequencing and high-throughput genome analysis are opening new perspectives that are changing our understanding of satellite DNA. This review examines recent data to provide a timely update on the overall information gathered about this part of the genome, focusing on the advances in the knowledge of its origin, its evolution, and its potential functional roles.

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“…Additionally, UGR08-F (5′-CCA ATT GGT CTC AAC TAG AACA-3′) and UGR08-R (5′-TGT TAT AGG TTT TGG ACT GCCA-3′), primers specific for the male-specific repetitive sequence RAYSII (Mariotti et al 2009) were used. Amplification with the primers R730-A (5′-CTC GGA CCA ATT ATC TCA T-3′) and R730-B (5′-CAT TAT TTG GGA GCC GAT -3′) (Navajas-Peréz et al 2005) was carried out to verify the template DNA quality. These primers amplify the repetitive RAE730 sequence that is located on the Rumex autosomes.…”

Section: Sex Ratio Analysismentioning

confidence: 99%