Abstract:
:Gene conversion, the non-reciprocal exchange of genetic information, is one of the potential products of meiotic recombination. It can shape genome structure by acting on repetitive DNA elements, influence allele frequencies at the population level, and is known to be implicated in human disease. But gene conversion is hard to detect directly except in organisms, like fungi, that group their gametes following meiosis. We have developed a novel visual assay that enables us to detect gene conversion events directly in the gametes of the flowering plant Arabidopsis thaliana. Using this assay we measured gene conversion events across the genome of more than one million meioses and determined that the genome-wide average frequency is 3.5×10(-4) conversions per locus per meiosis. We also detected significant locus-to-locus variation in conversion frequency but no intra-locus variation. Significantly, we found one locus on the short arm of chromosome 4 that experienced 3-fold to 6-fold more gene conversions than the other loci tested. Finally, we demonstrated that we could modulate conversion frequency by varying experimental conditions.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Sun Y,Ambrose JH,Haughey BS,Webster TD,Pierrie SN,Muñoz DF,Wellman EC,Cherian S,Lewis SM,Berchowitz LE,Copenhaver GPdoi
10.1371/journal.pgen.1002968subject
Has Abstractpub_date
2012-01-01 00:00:00pages
e1002968issue
10eissn
1553-7390issn
1553-7404pii
PGENETICS-D-12-00558journal_volume
8pub_type
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