rs17316597: Understanding the M450 Y-Chromosome Marker
The variant rs17316597, also known as M450 or S109, is a single nucleotide polymorphism located on the human Y chromosome. It serves as a diagnostic genetic marker used to identify individuals belonging to the I1 Y-DNA haplogroup.
What each genotype means
Haplogroup I1 marker
This genotype is a diagnostic marker for Y-chromosome haplogroup I1, also known as M450+ or S109+. Because this variant is located on the Y chromosome, it is passed directly from father to son and is used to trace paternal ancestry rather than to predict health outcomes or disease risk.
This genotype is found in individuals belonging to the I1 paternal lineage, which is a significant haplogroup in European populations.
Not haplogroup I1
This genotype indicates that the individual does not carry the M450/S109 mutation associated with Y-chromosome haplogroup I1. As this is a Y-chromosome marker, it is used for genealogical and ancestral research and does not have known clinical or health-related implications.
This genotype is observed in males who do not belong to the I1 paternal haplogroup.
Not haplogroup I1
This genotype indicates that the individual does not carry the M450/S109 mutation associated with Y-chromosome haplogroup I1. This variant is strictly an ancestral marker used in population genetics to identify paternal lineages and is not associated with any medical conditions or health traits.
This genotype is observed in males who do not belong to the I1 paternal haplogroup.
What is rs17316597?
The variant rs17316597 is a specific change in the DNA sequence found on the Y chromosome. In the context of genetic genealogy, it is widely recognized by its alternative names, M450 and S109. Because it is located on the Y chromosome—which is passed down from father to son with very few changes over generations—this SNP acts as a stable marker for tracing paternal lineages. It is not located within a protein-coding gene, meaning it does not provide instructions for building proteins or influence physical traits in the way that genes associated with health or appearance do. Instead, its primary utility is as a signpost in the study of human population history and ancestry.
Role in Haplogroup Identification
In human genetics, a haplogroup is a group of people who share a common ancestor through their paternal or maternal lines. The variant rs17316597 is a defining mutation for the I1 Y-DNA haplogroup. According to established phylogenetic trees, such as those maintained by the International Society of Genetic Genealogy (ISOGG), the presence of the derived allele at this position helps researchers and genealogists classify Y-chromosome lineages. By testing for this specific SNP, scientists can determine if a male individual belongs to the I1 clade, which is a significant branch of the broader Haplogroup I. This classification helps in mapping the migration patterns and historical distribution of human populations across different regions of the world.
Research and Evidence
The evidence supporting the use of rs17316597 as a marker for the I1 haplogroup is considered robust within the field of genetic genealogy. Research published in scientific literature has confirmed that this SNP distinguishes specific branches of the Y-chromosome tree. While it is a reliable tool for ancestry testing, it is important to note that this variant is not associated with any known medical conditions or health outcomes. Because it is an intergenic marker—meaning it sits in the non-coding regions of the Y chromosome—it does not influence biological function. Consequently, there are no clinical studies linking this variant to disease risk, drug response, or physiological traits. Its value remains strictly confined to the study of human evolutionary history and paternal lineage tracing.
Interpreting Your Results
If you have received results for rs17316597 from a genetic testing service, it is helpful to understand what this information means for you. This variant is a tool for exploring your deep ancestry rather than a medical diagnostic. You cannot use this information to predict health outcomes or make medical decisions. If you are interested in learning more about your paternal heritage, this marker can help you understand which branch of the human family tree your direct male ancestors belonged to. However, it is essential to keep in mind that genetic ancestry is complex and represents only one small part of your overall heritage. If you have questions about your health or genetic risks, always consult with a qualified healthcare provider or a genetic counselor who can provide context based on your full medical and family history.
How common is this variant?
The frequency of this variant is highly dependent on the specific paternal lineage being studied, as it is a marker for the I1 haplogroup, which is most commonly found in Northern Europe.
Frequently asked questions
Is rs17316597 associated with any diseases?
No. This variant is located in a non-coding region of the Y chromosome and is used exclusively for ancestry and genealogical research. It has no known impact on health or disease risk.
What does it mean if I am M450 positive?
Being M450 positive means you carry the derived allele at the rs17316597 position. This identifies you as a member of the I1 Y-DNA haplogroup, which is common in Northern European populations.
Can I use this SNP to find my relatives?
This SNP can help you identify individuals who share a common paternal ancestor in the distant past. It is a tool for deep ancestry rather than identifying close living relatives.
Where can I learn more about my haplogroup?
You can explore resources like the International Society of Genetic Genealogy (ISOGG) or consult with professional genetic genealogists. These resources provide detailed information on the history and migration patterns of various Y-DNA haplogroups.
Sources & further reading
Educational information only, last refreshed 9/20/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs17316597?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants
This Y-chromosomal variant is associated with somatic copy number loss in aggressive prostate tumors.
This mitochondrial missense variant (m.13708G>A, p.Ala458Thr) is a marker for haplogroup H2a5 and has been associated with variations in sperm motility and susceptibility to certain neurological conditions.
This variant is located in the EXOC6B gene, which encodes a component of the exocyst complex essential for vesicle trafficking and primary ciliogenesis.
Y-chromosomal SNP (U179) serving as a diagnostic marker for the I haplogroup lineage.
This mitochondrial variant (m.13708G>A) is a well-established marker for the H2a5 haplogroup within the broader H lineage.
This Y-chromosomal SNP is a marker for haplogroup R, specifically associated with the R1b subclade, which is prevalent in Western European populations.