The Y chromosome-specific STS marker MS2 and its peripheral regions on the Y chromosome of the dioecious plant Silene latifolia
Genome, ISSN: 0831-2796, Vol: 51, Issue: 4, Page: 251-260
2008
- 8Citations
- 11Captures
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Metrics Details
- Citations8
- Citation Indexes8
- CrossRef8
- Captures11
- Readers11
- 11
Article Description
Sex determination in Silene latifolia uses the XX/XY system. The recent evolution of dioecy in S. latifolia provides a unique opportunity to study the early stages of Y chromosome evolution. However, the current Y chromosome map still contains many large gaps with no available markers. In this study, a sequence tagged site (STS) marker, MS2, was isolated and mapped to the same locus as L8 on the Y chromosome. To investigate the peripheral regions of MS2, a bacterial artificial chromosome (BAC) library was constructed from a male plant, and the BAC clone containing MS2 (MS2-9d12F) was isolated from 32 640 clones with an average insert size of 115 kb. A 109-kb insert of the BAC clone was analyzed. BLASTX analysis showed 11 sequences similar to some known proteins, most of which are retrotransposon-like elements. The ORF Finder predicted 9 ORFs within MS2-9d12F. RT-PCR analyses revealed that only 4 of the 9 predicted ORFs are expressed in both male and female plants. These 4 ORFs are candidates for genes having counterparts on both the X and Y chromosomes. Dot-matrix plot analysis and a BLASTN search revealed LTR-like sequences close to the retrotransposon-like elements and high similarity to 3 known genomic sequences of S. latifolia. These results suggest an accumulation of retrotransposons and segmental duplications in peripheral regions of MS2 during the early stage of sex chromosome evolution. © 2008 NRC.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=43549090366&origin=inward; http://dx.doi.org/10.1139/g08-005; http://www.ncbi.nlm.nih.gov/pubmed/18356961; http://www.nrcresearchpress.com/doi/10.1139/G08-005; http://www.nrcresearchpress.com/doi/pdf/10.1139/G08-005; http://www.nrcresearchpress.com/doi/full-xml/10.1139/G08-005
Canadian Science Publishing
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