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Genetic markers are DNA sequences with known physical locations on chromosomes. They are points of variation that can be used to identify individuals or species, or may be used to associate an inherited disease with a gene through genetic linkage with nearby but possibly unidentified or uncharacterised genes. Examples include single nucleotide polymorphisms (SNPs) and minisatellites.
Using intensive eDNA sampling in space and time across five rivers in Europe and North America, this study shows that eDNA gives relevant information on freshwater diversity and ecology across broad taxonomic groups, and with limited downstream transport. The findings demonstrate that eDNA is vital for freshwater biodiversity monitoring in a time of anthropogenic change.
The effect of noncoding genetic variation on acute lymphoblastic leukemia treatment response is not fully understood. Here, the authors functionally evaluated variants associated with pharmacological traits and validate the role of rs1247117 in gene regulation impacting therapeutic response.
The first complete cycad genome offers an invaluable solution to sex determination, one of the largest conservation challenges in these enigmatic plants.