Sex chromosome-linked genes in plants

Matsunaga, Sachihiro

doi:10.1266/ggs.81.219

Cited by 31 publications

(24 citation statements)

References 76 publications

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“…It is not certain whether the SlCypX gene is on the Xp or Xq arm; if the former, further rearrangements would be necessary to move this gene close to the Su F gene. Although the locations of the SlY4, SlY3, SlY7, and SlY8 genes are somewhat uncertain, they are clearly not near the Su F gene and can all be assigned to the Yq arm, supporting the previous conclusions about SlY4 and SlY3 and inference of a pericentric inversion (Zluvova et al 2005a;Matsunaga 2006;Hobza et al 2007). However, in all three sets of deletion strains two deletions are needed to explain the absence of the SlY3 and SlY7 markers in some hermaphrodites.…”

Section: Resultssupporting

confidence: 67%

Defining Regions and Rearrangements of the Silene latifolia Y Chromosome

et al. 2008

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We combine data from published marker genotyping of three sets of S. latifolia Y chromosome deletion mutants with changed sex phenotypes and add genotypes for several new genic markers to refine the deletion map of the Y chromosome and compare it with the X chromosome genetic map. We conclude that the Y chromosome of this species has been derived through multiple rearrangements of the ancestral gene arrangement and that none of the rearrangements so far detected was involved in stopping X-Y recombination. Different Y genotypes may also differ in their gene content and possibly arrangements, suggesting that mapping the Y-linked sex-determining genes will be difficult, even if many further genic markers are obtained. Even in determining the map of Y chromosome markers to discover all the rearrangements, physical mapping by FISH or other experiments will be essential. Future deletion mapping work should ensure that markers are studied in the parents of deletion mutants and should probably include additional deletions that were not ascertained by causing mutant sex phenotypes.

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Section: Resultssupporting

confidence: 67%

Defining Regions and Rearrangements of the Silene latifolia Y Chromosome

et al. 2008

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“…The evolutionary events that led to the emergence of the Y chromosome are more complex than those for the X chromosome because multiple rearrangements have occurred entirely on the Y chromosome (Matsunaga 2006, Jamilena et al 2008. Mapping of the Y chromosome has been performed primarily by genotyping Y-deletion mutants using Y-linked genetic markers (Zluvova et al 2005, Bergero et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Various genomic approaches have been exploited to isolate sex chromosome-linked genes involved in sex determination and flower development in S. latifolia, including segregation analysis of random genes (Guttman andCharlesworth 1998, Filatov 2005), screening of a male flower cDNA library with microdissected Y-specific probes (Delichère et al 1999, Atanassov et al 2001, differential displays applied to male and female flower buds , Matsunaga et al 2005, and segregation analysis of intron size variants (Bergero et al 2007). Twelve sex chromosome-linked genes (MROS3X,SlMF1,SlX/Y1,SlX/Y4,DD44X/Y,SlX/Y3,SlssX/Y,SlCypX/Y,SlX/Y6a,SlX/Y6b,SlX/Y7,SlAP3Y) have been identified to date (Matsunaga 2006, Jamilena et al 2008. Matsunaga et al (2003) reported that SlAP3Y and its autosomal counterpart, SlAP3A, exhibit significant similarities to APETALA3, which functions in determining the identities of petals and stamens in Arabidopsis thaliana (Jack et al 1992).…”

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confidence: 99%

Sex Chromosome Evolution Revealed by Physical Mapping of SlAP3X/Y in the Dioecious Plant Silene latifolia

et al. 2010

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Summary Sex-linked genetic markers of Silene latifolia were mapped to the sex chromosomes with the aim of analyzing their evolutionary origins. SlAP3X/Y has been particularly uncertain for years. Its X-counterpart has not been identified, and very few Y-deletion mutants delete SlAP3Y. In this study, we verified the sex chromosome-linkage of SlAP3X and SlAP3Y through cloning, sequencing, and fluorescent in situ hybridization (FISH). SlAP3X, spanning a region of 1.6 kb, consists of 6 exons and 5 introns. SlAP3Y has 7 exons and 6 introns, the second intron being particularly large (24.4 kb). SlAP3Y spans 31 kb in total. Their Harr-plot analysis and the chromosome positions indicated by FISH using their own probes support the hypothesis that the translocation of SlAP3X/Y has occurred on either chromosome.

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“…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%

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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Sex chromosome-linked genes in plants

Cited by 31 publications

References 76 publications

Defining Regions and Rearrangements of the Silene latifolia Y Chromosome

Defining Regions and Rearrangements of the Silene latifolia Y Chromosome

Sex Chromosome Evolution Revealed by Physical Mapping of SlAP3X/Y in the Dioecious Plant Silene latifolia

Plant sex chromosomes: molecular structure and function

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