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.
PsoriasisDx Says Gene Test for Early Detection of Psoriatic Arthritis Can Help Lessen Joint Damage
The $399 PsoriasisDx Genetic Test is a sequencing-based assay that detects the presence of MICA-A9, an immune-response gene variant present in approximately 60 percent of patients with psoriatic arthritis.
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