Document Detail

Genetic effects on microsatellite diversity in wild emmer wheat (Triticum dicoccoides) at the Yehudiyya microsite, Israel.
MedLine Citation:
PMID:  12634821     Owner:  NLM     Status:  MEDLINE    
This study investigated allele size constraints and clustering, and genetic effects on microsatellite (simple sequence repeat, SSR) diversity at 28 loci comprising seven types of tandem repeated dinucleotide motifs in a natural population of wild emmer wheat, Triticum dicoccoides, from a shade vs sun microsite in Yehudiyya, northeast of the Sea of Galilee, Israel. It was found that allele distribution at SSR loci is clustered and constrained with lower or higher boundary. This may imply that SSR have functional significance and natural constraints. Genetic factors, involving genome, chromosome, motif, and locus significantly affected SSR diversity. Genome B appeared to have a larger average repeat number (ARN), but lower variance in repeat number (sigma(ARN)(2)), and smaller number of alleles per locus than genome A. SSRs with compound motifs showed larger ARN than those with perfect motifs. The effects of replication slippage and recombinational effects (eg, unequal crossing over) on SSR diversity varied with SSR motifs. Ecological stresses (sun vs shade) may affect mutational mechanisms, influencing the level of SSR diversity by both processes.
Y-C Li; T Fahima; M S Röder; V M Kirzhner; A Beiles; A B Korol; E Nevo
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Heredity     Volume:  90     ISSN:  0018-067X     ISO Abbreviation:  Heredity     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-03-13     Completed Date:  2003-09-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0373007     Medline TA:  Heredity     Country:  England    
Other Details:
Languages:  eng     Pagination:  150-6     Citation Subset:  IM    
Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel.
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MeSH Terms
Genetic Variation*
Microsatellite Repeats*
Triticum / genetics*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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