Chromosome-Scale Selective Sweeps and Genomic Diversity in C. elegans
Andersen, Gerke et al., Nature Genetics
Researchers at Princeton University and elsewhere discuss the effects of chromosome-scale selective sweeps on genomic diversity in Caenorhabditis elegans. Taking a high-throughput selective sequencing approach on a collection of 200 wild C. elegans strains, the team found that the nematode's "genome variation is dominated by a set of commonly shared haplotypes on four of its six chromosomes, each spanning many megabases." Further, the team reports on its population genetic modeling experiments, which showed that "this pattern was generated by chromosome-scale selective sweeps that have reduced variation worldwide; at least one of these sweeps probably occurred in the last few hundred years," it writes.
Q&A: MIT/Broad's Christopher Love on Massively Parallel, PCR-Based, Single-Cell Gene Expression Analysis
The method permits the detection of mRNA transcripts of interest for more than 6,000 single cells in parallel per assay with high sensitivity and specificity; and has a variety of applications, including detecting replicating intracellular pathogens such as retroviruses.
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