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Cheers,
I need advice. Some time ago I did a Yseq test (R1b-U106 Superclade Panel) and got the final haplogroup FGC18842-S21728-BY5719 which I see, is the same as BY5716. I also did a Y-37 Ftdna test earlier and am now considering whether to upgrade to BigY-700.
However, I'm not entirely sure what exactly you'd get with the BigY-700 test, given that my haplogroup has already been determined. Okay, so it's an older mutation, so I guess you'd get younger branches? I would be grateful for advice, or whether it is worth doing BigY in my case?
Best regards,
?
Damir
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Your YSeq results are quite impressive.? You now fall into a "so close, but so far" scenario.
FTDNA prefers BY5715.? ?There are nine people.? There are two subclades of BY5715 and you could go 3 to 4 levels deeper.? ?The following link is pre-set to BY5715
You get the names of your BigY matches and your non-Matching Variants.? This should include some or all of the nine plus others on nearby branches.? You can visualize these matches and SNPs on the Block Y tree.??
Your Y37 list will get refined to a Y111 match list.? That could be helpful as well.??
I think you have plenty to gain from a BigY, but that's just my opinion.? ??
FTDNA will likely have sales centered around Roots Tech at the end of February.? Or maybe sooner.? ?
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Hi Damir,
Martin correctly describes your situation. I'll just add a few points.
You may want to see this alternative visualisation from Family Tree DNA of what the family tree of R-BY5715 looks like: https://discover.familytreedna.com/y-dna/R-BY5715/tree If you look in the scientific details, you will see that your R-BY5715 family is about 2000 years old, and if you look in the variants tab, you will see that BY5719 is one of the SNPs that defines the R-BY5715 haplogroup.
YSeq's R-U106 super-panel is a good way for people to cheaply test down to a recent haplogroup. We recommend this test for people who aren't planning to take a BigY test but are interested in the deep history of their families. The benefits of this are that we have a fairly clear idea of the origins of the high-level haplogroups, so we can roughly tell where your ancestors were thousands of years ago (I think I've explained that background to you already). However, as we approach the present, we paradoxically have less information to work with, because we have fewer testers on which to base our judgements.
However, your YSeq tests are simply a static, yes/no test for a set of haplogroups. The BigY test is a discovery test. The test will scan approximately a quarter of your Y chromosome and look for new SNP mutations that you hold. With this, new haplogroups can be formed. You will find your place within R-BY5715, whether that is in a pre-existing haplogroup, or a new haplogroup. Immediately, we can say that you may find relatives closer to the present than 2000 years ago, which is where you are currently stuck.
But also, your SNPs will then be on record when new people come along, allowing new haplogroups to be formed in the future, which we don't know about yet. In future, as more people test, this will let you find new relatives closer to the present. So BigY is partly an investment in the future as well. You will find out more as the years pass.
You will also get a lot of STR results. If you have any Y-37 matches, these will get refined to Y-111, and you can use the leverage of the additional 600-700 STR markers you will get as part of the BigY to see how close you are to any matches who have also tested to these levels. Some of these matches may turn out to be irrelevant, but you may also gain matches if people have tested who are closely related to you, but have many mutations in the first 37 markers.
How useful you'll find that information really depends on what you're interested in, and exactly what the results are (which are unpredictable). Probably we will at least find something interesting for you about where your family was 1000-2000 years ago, perhaps more recently, but there is no guarantee. It can be a bit of a gamble.
Ultimately, there is also a point to kick-starting research in your area. If you have a BigY test, then it gives more reason to the people around you to test as well, since they can then immediately see how they are related to you. After all, the YSeq test you have just taken gets its SNPs from BigY tests: if you want your family's SNPs on the YSeq test, you may want to upgrade to BigY!
I'm also guessing from your name that you are of Croatian heritage. We desparately need people from southern and eastern Europe to upgrade to BigY to address the gross biases we have against testing in these regions. You would be very much doing our statistics a favour by upgrading, and with better statistics we can be clearer about how R-U106 has branched and spread over the last 5000 years. You will also help improve the estimates of how old all of the haplogroups within R-BY5715 are and, with these improved TMRCAs, we may be able to tell more about where R-BY5715 came from and how it spread.
So there are a lot of benefits to upgrading to BigY: a younger branch in the family tree, a better idea of how you are related to other tests, improved measurements of how old your recent chain of haplogroups are, and better statistics for us all. Whether those benefits are worth the cost is up to you!
Best wishes,
Iain.
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Another item to add to Iain's comment about southern and east European U106 individuals getting BigY results is that via the haplogroup branching one may be able to link back to a more northern or western European point of origin.? Would your line be a potential descendant of say a Christian crusader?? ?As we get more test results available this type of hypothesis can be investigated.? ?
We would also be looking for new lineages which might take the potential "vampire" association away from one of the group admins. He just has not lived up to Vlad the Impaler's legacy. It has been awhile since we have had to address potential U106 lineages which needed to be buried in strange ways - well outside of the royal lines which require excessive amounts of elaborate formality.
-Wayne K
On Tuesday, January 16, 2024 at 03:11:35 PM EST, Iain via groups.io <gubbins@...> wrote:
Hi Damir,
Martin correctly describes your situation. I'll just add a few points.
You may want to see this alternative visualisation from Family Tree DNA of what the family tree of R-BY5715 looks like: https://discover.familytreedna.com/y-dna/R-BY5715/tree If you look in the scientific details, you will see that your R-BY5715 family is about 2000 years old, and if you look in the variants tab, you will see that BY5719 is one of the SNPs that defines the R-BY5715 haplogroup.
YSeq's R-U106 super-panel is a good way for people to cheaply test down to a recent haplogroup. We recommend this test for people who aren't planning to take a BigY test but are interested in the deep history of their families. The benefits of this are that we have a fairly clear idea of the origins of the high-level haplogroups, so we can roughly tell where your ancestors were thousands of years ago (I think I've explained that background to you already). However, as we approach the present, we paradoxically have less information to work with, because we have fewer testers on which to base our judgements.
However, your YSeq tests are simply a static, yes/no test for a set of haplogroups. The BigY test is a discovery test. The test will scan approximately a quarter of your Y chromosome and look for new SNP mutations that you hold. With this, new haplogroups can be formed. You will find your place within R-BY5715, whether that is in a pre-existing haplogroup, or a new haplogroup. Immediately, we can say that you may find relatives closer to the present than 2000 years ago, which is where you are currently stuck.
But also, your SNPs will then be on record when new people come along, allowing new haplogroups to be formed in the future, which we don't know about yet. In future, as more people test, this will let you find new relatives closer to the present. So BigY is partly an investment in the future as well. You will find out more as the years pass.
You will also get a lot of STR results. If you have any Y-37 matches, these will get refined to Y-111, and you can use the leverage of the additional 600-700 STR markers you will get as part of the BigY to see how close you are to any matches who have also tested to these levels. Some of these matches may turn out to be irrelevant, but you may also gain matches if people have tested who are closely related to you, but have many mutations in the first 37 markers.
How useful you'll find that information really depends on what you're interested in, and exactly what the results are (which are unpredictable). Probably we will at least find something interesting for you about where your family was 1000-2000 years ago, perhaps more recently, but there is no guarantee. It can be a bit of a gamble.
Ultimately, there is also a point to kick-starting research in your area. If you have a BigY test, then it gives more reason to the people around you to test as well, since they can then immediately see how they are related to you. After all, the YSeq test you have just taken gets its SNPs from BigY tests: if you want your family's SNPs on the YSeq test, you may want to upgrade to BigY!
I'm also guessing from your name that you are of Croatian heritage. We desparately need people from southern and eastern Europe to upgrade to BigY to address the gross biases we have against testing in these regions. You would be very much doing our statistics a favour by upgrading, and with better statistics we can be clearer about how R-U106 has branched and spread over the last 5000 years. You will also help improve the estimates of how old all of the haplogroups within R-BY5715 are and, with these improved TMRCAs, we may be able to tell more about where R-BY5715 came from and how it spread.
So there are a lot of benefits to upgrading to BigY: a younger branch in the family tree, a better idea of how you are related to other tests, improved measurements of how old your recent chain of haplogroups are, and better statistics for us all. Whether those benefits are worth the cost is up to you!
Best wishes,
Iain.
|
Well,
Speaking of the devil (ahem, vampire), ha-ha, my own BigY test result is slowly paying off. I used to get a match before with someone from Slovenia, but now I have a newer match, one branch below the former, therefore in early medieval times, with someone
from the Czech Republic.?
As we can see, “the dead travel fast”, as Bram Stoker would have put it elegantly back in 1897 (when my paternal grandfather was actually born in Romania - so I can say he was born two centuries ago).
Leaving all jokes aside, it is nice to test and then lay back and wait for miracles to happen (novel matches).
A retired (“Bohemian”-Transylvanian) vampire,
On Jan 16, 2024, at 4:52?PM, Wayne via groups.io <dna_wayne@...> wrote:
?
Another item to add to Iain's comment about southern and east European U106 individuals getting BigY results is that via the haplogroup branching one may be able to link back to a more northern or western European point of
origin.? Would your line be a potential descendant of say a Christian crusader?? ?As we get more test results available this type of hypothesis can be investigated.? ?
We would also be looking for new lineages which might take the potential "vampire" association away from one of the group admins. He just has not lived up to Vlad the Impaler's legacy. It has been awhile since we have had to address potential U106 lineages
which needed to be buried in strange ways - well outside of the royal lines which require excessive amounts of elaborate formality.
-Wayne K
On Tuesday, January 16, 2024 at 03:11:35 PM EST, Iain via groups.io <gubbins@...> wrote:
Hi Damir,
Martin correctly describes your situation. I'll just add a few points.
You may want to see this alternative visualisation from Family Tree DNA of what the family tree of R-BY5715 looks like:
https://discover.familytreedna.com/y-dna/R-BY5715/tree
If you look in the scientific details, you will see that your R-BY5715 family is about 2000 years old, and if you look in the variants tab, you will see that BY5719 is one of the SNPs that defines the R-BY5715 haplogroup.
YSeq's R-U106 super-panel is a good way for people to cheaply test down to a recent haplogroup. We recommend this test for people who aren't planning to take a BigY test but are interested in the deep history of their families. The benefits of this are that
we have a fairly clear idea of the origins of the high-level haplogroups, so we can roughly tell where your ancestors were thousands of years ago (I think I've explained that background to you already). However, as we approach the present, we paradoxically
have less information to work with, because we have fewer testers on which to base our judgements.
However, your YSeq tests are simply a static, yes/no test for a set of haplogroups. The BigY test is a discovery test. The test will scan approximately a quarter of your Y chromosome and look for new SNP mutations that you hold. With this, new haplogroups
can be formed. You will find your place within R-BY5715, whether that is in a pre-existing haplogroup, or a new haplogroup. Immediately, we can say that you may find relatives closer to the present than 2000 years ago, which is where you are currently stuck.
But also, your SNPs will then be on record when new people come along, allowing new haplogroups to be formed in the future, which we don't know about yet. In future, as more people test, this will let you find new relatives closer to the present. So BigY
is partly an investment in the future as well. You will find out more as the years pass.
You will also get a lot of STR results. If you have any Y-37 matches, these will get refined to Y-111, and you can use the leverage of the additional 600-700 STR markers you will get as part of the BigY to see how close you are to any matches who have also
tested to these levels. Some of these matches may turn out to be irrelevant, but you may also gain matches if people have tested who are closely related to you, but have many mutations in the first 37 markers.
How useful you'll find that information really depends on what you're interested in, and exactly what the results are (which are unpredictable). Probably we will at least find something interesting for you about where your family was 1000-2000 years ago,
perhaps more recently, but there is no guarantee. It can be a bit of a gamble.
Ultimately, there is also a point to kick-starting research in your area. If you have a BigY test, then it gives more reason to the people around you to test as well, since they can then immediately see how they are related to you. After all, the YSeq test
you have just taken gets its SNPs from BigY tests: if you want your family's SNPs on the YSeq test, you may want to upgrade to BigY!
I'm also guessing from your name that you are of Croatian heritage. We desparately need people from southern and eastern Europe to upgrade to BigY to address the gross biases we have against testing in these regions. You would be very much doing our statistics
a favour by upgrading, and with better statistics we can be clearer about how R-U106 has branched and spread over the last 5000 years. You will also help improve the estimates of how old all of the haplogroups within R-BY5715 are and, with these improved TMRCAs,
we may be able to tell more about where R-BY5715 came from and how it spread.
So there are a lot of benefits to upgrading to BigY: a younger branch in the family tree, a better idea of how you are related to other tests, improved measurements of how old your recent chain of haplogroups are, and better statistics for us all. Whether
those benefits are worth the cost is up to you!
Best wishes,
Iain.
|
Thanks for the answers. I will upgrade to Big Y, looking forward to results!
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Thanks for the answers. Ian as always professional and comprehensive, inspiring. Yes I am Croatian and It would be nice if I can contribute a little to the understanding of the history of that branch. All things considered, there is no choice but to make BigY. It is decided!?
Best regards,?
Damir
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@iain? can I just clarify what you said above.
If I upgrade to the big y I will be the first within my group to do so.? I have been thinking about this for a while and probably will next sale.
But you mentioned y37 matches being upgraded to the y111 level.
This would be amazing as a tester at the level is now deceased.
Jason
Thanks for the answers. Ian as always professional and comprehensive, inspiring. Yes I am Croatian and It would be nice if I can contribute a little to the understanding of the history of that branch. All things considered, there is no choice but to make BigY. It is decided!?
Best regards,?
Damir
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Hi Jason,
Being the first person in your Y-STR match set to upgrade can be very useful in terms of deeper ancestry, as it puts your group in a wider geographical context. For the people in your wider haplogroup, this also establishes the existence of a new branch, which can be very instructive when we start to look at origins.
To clarify the point on Y-STR matches, your matches themselves are not upgraded. So if a person has only taken a Y-37 test, then you will still only see them on your Y-37 matches page. However, if you have only tested Y-37 (as Damir has) but your matches have tested to Y-67, Y-111 or BigY themselves, then upgrading to BigY will let you see these matches at the level to which they've tested.
Deceased persons' DNA is an increasing problem in genetic genealogy. The average age of new testers seems to be about 65, perhaps because something about retirement triggers a genealogical interest! However, this means that (in the US) the average tester will only live around 15-20 years, so anyone you see with a four-digit kit number is already more likely to be dead than alive. Unfortunately, there's very little that can be done, as the testing companies are generally very hesitant to use someone's DNA without clear instruction from that person or their official respresentative. This is why it is very important that testers today name a beneficiary to their account. This can be as simple as making sure the account login is passed onto your descendants, or it can (preferably also) be set up in your account: https://help.familytreedna.com/hc/en-us/articles/360004731636-Beneficiary-Information-Tab
Cheers,
Iain.
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There'd 5 of us now upgraded to the 111 level a few only at 67.? At 37 level many matches we don't recognise as belonging to our surname.
Will look at the next sale was 200 dollar.
Hi Jason,
Being the first person in your Y-STR match set to upgrade can be very useful in terms of deeper ancestry, as it puts your group in a wider geographical context. For the people in your wider haplogroup, this also establishes the existence of a new branch, which can be very instructive when we start to look at origins.
To clarify the point on Y-STR matches, your matches themselves are not upgraded. So if a person has only taken a Y-37 test, then you will still only see them on your Y-37 matches page. However, if you have only tested Y-37 (as Damir has) but your matches have tested to Y-67, Y-111 or BigY themselves, then upgrading to BigY will let you see these matches at the level to which they've tested.
Deceased persons' DNA is an increasing problem in genetic genealogy. The average age of new testers seems to be about 65, perhaps because something about retirement triggers a genealogical interest! However, this means that (in the US) the average tester will only live around 15-20 years, so anyone you see with a four-digit kit number is already more likely to be dead than alive. Unfortunately, there's very little that can be done, as the testing companies are generally very hesitant to use someone's DNA without clear instruction from that person or their official respresentative. This is why it is very important that testers today name a beneficiary to their account. This can be as simple as making sure the account login is passed onto your descendants, or it can (preferably also) be set up in your account:
Cheers,
Iain.
|
Did a BigY about ten days ago. I look forward to the results!
Best regards,?
|
Cheers,
?
yesterday I got new results, which come before Big Y. At 111, 67 and 37 I don't have a single match, at 25 I have 655, of which 4 exact matches and a lot of 1 step genetic distance. Earlier, I mistakenly stated that I had already done Y-37, but actually I just did the autosomal test. As far as I can see, the countries listed are England, United States, Germay and France. The haplogroup R-M269 was given to me, which of course is very superficial. Any comments? How relevant is the Y-25 match, not so much? Can I draw anything meaningful from these results?
Thanks
Dado
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I won't see this as I am already tested to the 111 marker level and I am about 3 weeks behind you on the big y as only upgraded to that on the 20th March.
I too only show as m269.? What I do know was my late father was pf5143 below z30 so hopefully ftdna will expand on this.
Jason
Cheers,
?
yesterday I got new results, which come before Big Y. At 111, 67 and 37 I don't have a single match, at 25 I have 655, of which 4 exact matches and a lot of 1 step genetic distance. Earlier, I mistakenly stated that I had already done Y-37, but actually I just did the autosomal test. As far as I can see, the countries listed are England, United States, Germay and France. The haplogroup R-M269 was given to me, which of course is very superficial. Any comments? How relevant is the Y-25 match, not so much? Can I draw anything meaningful from these results?
Thanks
Dado
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Jason,
You might want to read Roberta Estes regarding Bennett Greenspan's thoughts about Y12
This link should get you there
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Posts about Migration written by Roberta Estes
dna-explained.com
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toggle quoted message
Show quoted text
I won't see this as I am already tested to the 111 marker level and I am about 3 weeks behind you on the big y as only upgraded to that on the 20th March.
I too only show as m269.? What I do know was my late father was pf5143 below z30 so hopefully ftdna will expand on this.
Jason
Cheers,
?
yesterday I got new results, which come before Big Y. At 111, 67 and 37 I don't have a single match, at 25 I have 655, of which 4 exact matches and a lot of 1 step genetic distance. Earlier, I mistakenly stated that I had already done Y-37, but actually
I just did the autosomal test. As far as I can see, the countries listed are England, United States, Germay and France. The haplogroup R-M269 was given to me, which of course is very superficial. Any comments? How relevant is the Y-25 match, not so much? Can
I draw anything meaningful from these results?
Thanks
Dado
|
For the most part, you will hear that 25 marker matches are not relevant. Out of my 109, 5 of them are not relevant.?
However, the 104 that are hold their relevance out to 37,67,111 or Big Y, whatever their level. I guess I have an odd haplotype, where even a similar number of my y12 matches are relevant.?
The fact you say that out of your 655 matches, you have none at additional levels, makes me think for the most part that the vast majority of these may not be relevant.?
I do have 114 Big Y matches, several I do not match at 25 markers. So hopefully you have a few as well.?
toggle quoted message
Show quoted text
On Apr 21, 2024, at 3:38?AM, Dado <dstanic@...> wrote:
? Cheers,
?
yesterday I got new results, which come before Big Y. At 111, 67 and 37 I don't have a single match, at 25 I have 655, of which 4 exact matches and a lot of 1 step genetic distance. Earlier, I mistakenly stated that I had already done Y-37, but actually I just did the autosomal test. As far as I can see, the countries listed are England, United States, Germay and France. The haplogroup R-M269 was given to me, which of course is very superficial. Any comments? How relevant is the Y-25 match, not so much? Can I draw anything meaningful from these results?
Thanks
Dado
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Yes that's an interesting way of looking at it.? As I am sure we all have matches that disappear at 1 level before reappearing at another.? So many of these 12 might not show at 25 and 37 but could reappear at 67 and 111.
Interesting read.
On Sun, 21 Apr 2024, 13:39 Robert McMillan via , <tensawmac= [email protected]> wrote: For the most part, you will hear that 25 marker matches are not relevant. Out of my 109, 5 of them are not relevant.?
However, the 104 that are hold their relevance out to 37,67,111 or Big Y, whatever their level. I guess I have an odd haplotype, where even a similar number of my y12 matches are relevant.?
The fact you say that out of your 655 matches, you have none at additional levels, makes me think for the most part that the vast majority of these may not be relevant.?
I do have 114 Big Y matches, several I do not match at 25 markers. So hopefully you have a few as well.?
Robert McMillan ? Cheers,
?
yesterday I got new results, which come before Big Y. At 111, 67 and 37 I don't have a single match, at 25 I have 655, of which 4 exact matches and a lot of 1 step genetic distance. Earlier, I mistakenly stated that I had already done Y-37, but actually I just did the autosomal test. As far as I can see, the countries listed are England, United States, Germay and France. The haplogroup R-M269 was given to me, which of course is very superficial. Any comments? How relevant is the Y-25 match, not so much? Can I draw anything meaningful from these results?
Thanks
Dado
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>?matches that disappear at 1 level before reappearing at another
i wish. I have 478 matches at Y12, 15 matches at Y25, and one at Y37. I upgraded to Y67 and then Y111 but still one match. I have 4 Big Y matches, three of which are negative for my penultimate haplogroup, R-Y8604. I put this down to the much lower rate of Y testing by German heritage men, but it could be just a long familial bottleneck.?
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Hi folks, ? A few replies/comments to messages... ? The idea behind the Y-STR genetic-distance-based matching criteria at FTDNA are that you should have about a 50% probability of matching any one person within the last 1000 years. If you look at your Y-DNA matches page, there is a little blue calender icon at the top-right of each match. Clicking on this brings up a "Time Predictor" table, which shows you how a match at a specific genetic distance should nominally(!) correspond to a period in time. ? You might therefore expect the number of matches to have at each level to be constant. However, the number of people you will find at each matching level will depend on three things: (1) the mutations your family has in that set of 12, 25, 37, 67 or 111 Y-STRs; (2) the number of cousins you have in successive generations throughout the last 1000 years and beyond; and (3) how many of those cousins have tested with FTDNA. ? The key thing that more STRs gets you is accuracy. The usefulness of your match list at any level relies on your family having had mutations on those STRs within a genealogical timeframe, and also relies on no-one else having had those same mutations. For example, my family has had two mutations in the first 12 Y-STRs, and these occurred many centuries ago. A couple of dozen people have tested at FTDNA from my broader family, which is about 600 years old. However, many people across R-U106 and R-P312 have also had these mutations, so I have thousands of irrelevant matches in my Y-12 match list. Most other people have similar stories. ? It's very rare to find someone whose Y-12 matches are generally useful, since they normally consist of people who also match them at higher levels. So if you see someone who is a Y-12 match, but they have also taken a Y-111 test and you don't match them there, chances are you are not related within the last 1000 years or so, and may share no connection for thousands of years in the past. The fact that you share these first few Y-STR mutations but not the remainder of your mutations is likely due to a simple chance co-incidence of having the same mutations, not because you share mutations by descent. ? As you increase the number of Y-STRs tested, the chances of someone from a completely different haplogroup sharing your Y-STR mutations by chance drops, so the number of irrelevant matches drops. How fast this happens depends on your haplogroup, and the three factors I mentioned above. If (like me) you still have hundreds of Y-25 matches, chances are these STRs aren't being very selective, and these people aren't relevant to you. If you only have a handful of Y-25 matches, or if (like Robert) you have more matches that mostly share the same surname, then your mutations are rarer or more numerous and these 25 STRs are being much more selective for your closer relations. ? Again, the same check is valuable: if people have tested beyond Y-25 and don't match you at higher levels, probably they are not related to you within the last 1000 years or thereabouts. ? For most people, Y-37 will at least give you matches within an historical timeframe, but many people will find from later testing that list this includes many of the matches that are 2000 or 3000 years ago. A small fraction will find matches that are even older, for R-U106 perhaps even including some in R-P312, so Y-37 still doesn't guarantee a close relationship for everyone. Then again, there are some people (like me) who don't have any matches in these timescales between about 1000 and 4000 years ago, so Y-37 provides a very clean separation! ? I have yet to come across anyone whose 67-marker matches do not show their historical era ancestors. So the bottom line is that I would treat every Y-67 and every Y-111 match as relevant and, for most people, Y-37 matches are relevant too. This is now FTDNA's minimum testing level for a reason! Equally, while Y-25 and maybe even Y-12 matches are useful for some people, these people are fairly few and far between, especially at the Y-12 level. Their principle purpose is to identify really old tests where people of interest have not tested to the Y-37 level. ? If you don't have any matches beyond Y-12 and Y-25, then it's likely that either no-one in the FTDNA Y-DNA database is related to you via your male line within the last 1000 years or so, or you have an unusual number of mutations in your Y-DNA. This normally happens if your family comes from somewhere that's severely under-tested (for R-U106, that might include places such as France or Eastern Europe) but can rarely happen if you have had unusual mutations in your Y-DNA (e.g. recent large-scale deletions, recLOHs, etc.). In this case, the SNP results and resulting haplogroup from a BigY test will give you an indication of where you fit into the overall structure of European history, but will not tell you much about your family's exploits in the genealogical era. ? Cheers, ? Iain.
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Greetings,
Thanks everyone for the answers. I was a bit confused because FTDNA shows that with people who are an exact match on Y25 I have a common ancestor born between 1400-1950, most likely around 1750,? but this is clearly a mistake. I was hoping for a better result, but it is what it is. I obviously need to wait for more people from this area to be tested, because I believe that the lack of matches is the result of poor testing from the area of ??Central and Eastern Europe and perhaps the Northern Balkans. But I still have to see what the SNP, BigY will show.
Cheers!
Dado
|
The Law of Large Numbers applies to Y STR testing. The more STR markers tested the better.
I quote FTDNA.
"As the marker level increases, the time frame becomes more narrow, and the test becomes more refined."
The confidence intervals improve (narrow) when estimating relationships from Y STR Genetic Distances (GDs).
https://help.familytreedna.com/hc/en-us/articles/6399222636047-Y-DNA-FTDNATiP-Report-User-Guide#h_01H8YB9RVVE90QYW2SV9F9RE0B
However, I agree that STR based Genetic Distances can be ambiguous. This is clearly true in heavily tested surnames and clans where Big Y700 ascertained branching (variant/SNP based) provides more precision.
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Wayne
Mark Winz