Meiotic crossover hotspots contained in haplotype block boundaries of the mouse genome

作者：Kauppi Liisa^*; Jasin Maria; Keeney Scott

来源：Proceedings of the National Academy of Sciences of the United States of America, 2007, 104(33): 13396-13401.

DOI：10.1073/pnas.0701965104

• meiosis
• mouse strain
• recombination
• single-nucleotide polymorphism
• allele-specified PCR

Fertility requires successful chromosome segregation in meiosis, which in most sexual organisms depends on the formation of appropriately placed crossovers. The nonrandom genome-wide distributions of meiotic recombination events have been examined at the molecular level experimentally in yeast and by inference from linkage disequilibrium patterns in humans. Thus far, no method has existed for pinpointing sites of crossing-over on a genome-wide scale in an experimentally tractable animal whose genome size and complexity models that of humans. Here, we present a genomic approach to identify mouse crossover hotspots, based on targeting haplotype block boundaries. This represents a previously undescribed method potentially applicable to largescale mouse hotspot identification. Using this method, we have successfully predicted the location of two previously uncharacterized crossover hotspots in male mice. As increasing amounts of sing le-nucleotide polymorphism data emerge, this approach will be useful for investigating the recombination landscape of the mouse genome.

• 出版日期2007-8-14