Rapid evolution and complex structural organization in genomic regions harboring multiple prolamin genes in the polyploid wheat genome

Rapid evolution and complex structural organization in genomic regions harboring multiple... Genes encoding wheat prolamins belong to complicated multi-gene families in the wheat genome. To understand the structural complexity of storage protein loci, we sequenced and analyzed orthologous regions containing both gliadin and LMW-glutenin genes from the A and B genomes of a tetraploid wheat species, Triticum turgidum ssp. durum. Despite their physical proximity to one another, the gliadin genes and LMW-glutenin genes are organized quite differently. The gliadin genes are found to be more clustered than the LMW-glutenin genes which are separated from each other by much larger distances. The separation of the LMW-glutenin genes is the result of both the insertion of large blocks of repetitive DNA owing to the rapid amplification of retrotransposons and the presence of genetic loci interspersed between them. Sequence comparisons of the orthologous regions reveal that gene movement could be one of the major factors contributing to the violation of microcolinearity between the homoeologous A and B genomes in wheat. The rapid sequence rearrangements and differential insertion of repetitive DNA has caused the gene islands to be not conserved in compared regions. In addition, we demonstrated that the i-type LMW-glutenin originated from a deletion of 33-bps in the 5′ coding region of the m-type gene. Our results show that multiple rounds of segmental duplication of prolamin genes have driven the amplification of the ω-gliadin genes in the region; such segmental duplication could greatly increase the repetitive DNA content in the genome depending on the amount of repetitive DNA present in the original duplicate region. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Rapid evolution and complex structural organization in genomic regions harboring multiple prolamin genes in the polyploid wheat genome

Loading next page...
 
/lp/springer_journal/rapid-evolution-and-complex-structural-organization-in-genomic-regions-rY7L5NCNZk
Publisher
Springer Netherlands
Copyright
Copyright © 2007 by Springer Science+Business Media B.V.
Subject
Life Sciences; Plant Pathology; Biochemistry, general; Plant Sciences
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1007/s11103-007-9208-1
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial