Navigation Links
NIST guides genetic genealogy labs toward improved accuracy
Date:12/23/2008

Anyone who has watched crime dramas on TV knows that forensic scientists can use DNA profiling to identify people from evidence gathered at a crime scene, establish a paternity link or help free an innocent person who has been wrongly jailed. A lesser known but rapidly growing application of DNA profiling is tracing a persons paternal ancestrya process known as genetic genealogy. The laboratories performing this testing often differ in their results, making data comparison between labs difficult and casting doubt on reported genetic matches. Researchers at the National Institute of Standards and Technology (NIST) recently published a paper* with recommendations for genealogy testing that they hope will improve the accuracy and reliability of the product.

A mans paternal lineage can be traced using the DNA on his Y chromosome (Y-DNA), which, like many European surnames, passes from father to son. DNA profiling provides a genetic path that follows the surname through the years. Women who wish to know their ancestry can ask their father, brother, paternal uncle or paternal grandfather to take the test for them.

Genetic genealogy works by studying the sequences of repeating nucleotide (the base components of DNA) patterns on the Y chromosome known as short tandem repeats (STRs). Each STR is considered a separate marker for potential genetic matching because the number of times it is repeated will be the same for related males. For example, a person may have one STR sequence that repeats 12 times, another 11 times, a third 17 times and so on. If another male has a Y chromosome with a high percentage of the same STRs, it is considered likely that they share a common ancestor. Accurately counting the number of repeats is a tricky task and the source of much of the error in genetic genealogy tests, causing genealogists to make incorrect matches or miss family connections altogether.

In their paper, the NIST researchers explain the basis for the differing interpretations and recommend a solution using the agencys certified reference material for human Y-chromosome DNA profiling (Standard Reference Material 2395), a collection of Y-STR markers that can serve as a means for genetic labs to calibrate their testing equipment. The researchers strongly encourage [SRM 2395s] use to enable compatible and calibrated measurements to be made between different Y-STR testing laboratories.

Their sentiment is echoed by an editorial in the Journal of Genetic Genealogy that says of the NIST paper, The advantages of having industry-wide standards are compelling for both buyers and sellers of genetic genealogy services.


'/>"/>

Contact: Michael E. Newman
michael.newman@nist.gov
301-975-3025
National Institute of Standards and Technology (NIST)
Source:Eurekalert

Related biology news :

1. Odd protein interaction guides development of olfactory system
2. U. of I. librarian launches comprehensive Web database of field guides
3. Scientists discover a molecular scaffold that guides connections between brain cells
4. Polarized light guides cholera-carrying midges that contaminate water supplies
5. Does the desire to consume alcohol and tobacco come from our genetic makeup?
6. Diverse genetic abnormalities lead to NF-κB activation in multiple myeloma
7. Many parents at-risk for cancer disclose genetic test results to children
8. Genetics determine optimal drug dose of common anticoagulant
9. Claims of sex-related differences in genetic association studies often not properly validated
10. American College of Medical Genetics responds to new FDA labeling decision for warfarin
11. UNC study questions FDA genetic-screening guidelines for cancer drug
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/12/2016)... WearablesResearch.com , a brand of Troubadour ... from the Q1 wave of its quarterly wearables survey. ... receptivity to a program where they would receive discounts ... company. "We were surprised to see that ... LaColla , CEO of Troubadour Research, "primarily because there ...
(Date:4/26/2016)... LONDON , April 26, 2016 /PRNewswire/ ... Systems, a product subsidiary of Infosys (NYSE: ... partnership to integrate the Onegini mobile security platform ... http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The integration ... security to access and transact across channels. Using ...
(Date:4/14/2016)... , April 14, 2016 ... Malware Detection, today announced the appointment of Eyal ... new role. Goldwerger,s leadership appointment comes at ... heels of the deployment of its platform at several ... biometric technology, which discerns unique cognitive and physiological factors, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... -- Houston Methodist Willowbrook Hospital has signed a ... serve as their official health care provider. As ... provide sponsorship support, athletic training services, and most ... athletes and families. "We are excited ... to bring Houston Methodist quality services and programs ...
(Date:6/23/2016)...   EpiBiome , a precision microbiome engineering company, ... financing from Silicon Valley Bank (SVB). The financing will ... its drug development efforts, as well as purchase additional ... has been an incredible strategic partner to us – ... would provide," said Dr. Aeron Tynes Hammack , ...
(Date:6/23/2016)... LOUISVILLE, Ky. , June 23, 2016 /PRNewswire/ ... from two Phase 1 clinical trials of its ... double-blind, placebo-controlled, single and multiple ascending dose studies ... and pharmacodynamics (PD) of subcutaneous injection in healthy ... APL-2 subcutaneously (SC) either as a single dose ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only free ... and will showcase its product’s latest features from June 26 to June 30, ... poster on Disrupting Clinical Trials in The Cloud during the conference. DIA ...
Breaking Biology Technology: