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Archiver > GENEALOGY-DNA > 2005-09 > 1127337644


From: "David F Reynolds" <>
Subject: Felstead TMRCA, hg E3b (was Re: [DNA] SMGF adjustments to FTDNA values)
Date: Wed, 21 Sep 2005 14:20:44 -0700
References: <380-220059220214337977@M2W087.mail2web.com> <43308839.6020402@dna-fingerprint.com> <REME20050920182157@alum.mit.edu> <op.sxfa9wsxpqnhvj@pablo> <009001c5be39$39effe50$0100a8c0@chrissam> <op.sxfdbclzpqnhvj@pablo> <00c101c5be3e$424f7300$0100a8c0@chrissam> <001c01c5beb5$a6d62fe0$0100a8c0@chrissam>
In-Reply-To: <001c01c5beb5$a6d62fe0$0100a8c0@chrissam>


Edward,

I'm assumming this is your ysearch record:
http://www.ysearch.org/lastname_view.asp?viewuid=HPF4Y&p=0

There appears to be four lines of interest in the SMGF database; all match on 33 markers (36 alleles), with 3 more varying between the four.
#1 yours, going back five generations to William Felstead
(DYS448=21, DYS449=31, Y-GATA-C4=22)
#2 an English one, going back five generations to Joseph Felstead
(DYS448=21, DYS449=32, Y-GATA-C4=22)
#3 a Canadian one, going back three generations to a George Felstead
(DYS448=20, DYS449=31, Y-GATA-C4=23)
#4 an English one, going back five generations to another George Felstead
(DYS448=20, DYS449=32, Y-GATA-C4=23)

One point of interest is that all of these Felstead lines appear to be haplogroup E3b, which is relatively uncommon in Great Britain. I don't think there can be any doubt that all are descended from a common ancestor.

SMGF's TMRCA calculation between yourself and #2 shows there is a 25% chance that you have common ancestor within 6 generation, 50% within 11 generations, and 75% within 17 generations. Depending on who does the calculation (and the mutation rate and years/generation numbers they use), the numbers will vary, but the answer will always be in terms of a probability for a number of generations -- there is no way to calculate a precise answer.

Question to TMRCA experts on the list: Given the above, how might one calculate a TMRCA for a common ancestor to all four lines, given that an ancestral haplotype cannot be deduced from the above data.

Regards,
david

On Wed, 21 Sep 2005 07:06:24 -0700, Edward Felstead <> wrote:

> Dear David
> I followed the procedure as you outlined and it worked perfectly.
> I now have a 36/36 with my son and a 35/36 match with another participant with the SAME
> NAME and from the SAME COUNTRY.
> I am not well versed re DNA match's so I wonder if you could give me your opinion
> with regard to my relationship with the person who I match 35/36.
> I believe this is known as the MOST RECENT COMMON ANCESTOR and is expressed in
> GENERATIONS?
> Thank you for your help.
> Best Wishes
> Edward
> ----- Original Message -----
> From: "Edward Felstead" <>
> To: <>
> Sent: Wednesday, September 21, 2005 12:51 AM
> Subject: Re: [DNA] SMGF adjustments to FTDNA values
>
>
>> Thanks David -I will have a go at that!
>> Edward
>> ----- Original Message -----
>> From: "David F Reynolds" <>
>> To: <>
>> Sent: Wednesday, September 21, 2005 12:39 AM
>> Subject: Re: [DNA] SMGF adjustments to FTDNA values
>>
>>
>>> There are 11 values which do not have FTDNA equivalents (i.e., FTDNA does not test for
>>> them). To find out what those values are is basically a trial-and-error process. The
>>> way I do it to look at the values for each marker listed at:
>>> http://smgf.org/marker_details.html
>>> and start with the most common value for the particular marker, and then cycle from
>>> there. Usually takes about 15-30 minutes, depending on how unusual some of the values
>>> are.
>>>
>>> Regards,
>>> david
>>>
>>> On Tue, 20 Sep 2005 16:15:44 -0700, Edward Felstead <> wrote:
>>>
>>>> Hi David
>>>> I was just reading your posting Re FTDNA and SMGF.
>>>> I wonder if you could help me.
>>>> I have a full 37 marker test with FTDNA but when I enter my values on SMGF I can only
>>>> use 25 of the box's to enter my values as I don't have the FTDNA equivalents to SMGF.
>>>> How did you manage to enter 36!
>>>> Thanks
>>>> Best wishes
>>>> Edward
>>>> ----- Original Message -----
>>>> From: "David F Reynolds" <>
>>>> To: <>
>>>> Sent: Tuesday, September 20, 2005 11:54 PM
>>>> Subject: [DNA] SMGF adjustments to FTDNA values
>>>>
>>>>
>>>>>
>>>>> If I tick "Family Tree DNA" on the SMGF search page, I get these results:
>>>>> http://tinyurl.com/due6n
>>>>>
>>>>> Equivalent search if I tick "Do not convert (use SMGF standard)":
>>>>> http://tinyurl.com/d57vu
>>>>>
>>>>> SMGF applies the following adjustments if "Family Tree DNA" is selected:
>>>>> DYS19 +1
>>>>> DYS448 +3
>>>>> DYS461 -1
>>>>> DYS463 +2
>>>>> Y-GATA-H4 +1
>>>>>
>>>>> The 36/36 match is me, the 35/36 (with the missing DYS463) match is my son.
>>>>>
>>>>> Regards,
>>>>> david
>>>>>
>>>>>
>>>>> ==============================
>>>>> Search the US Census Collection. Over 140 million records added in the
>>>>> last 12 months. Largest online collection in the world. Learn more:
>>>>> http://www.ancestry.com/s13965/rd.ashx
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> No virus found in this incoming message.
>>>>> Checked by AVG Anti-Virus.
>>>>> Version: 7.0.300 / Virus Database: 267.11.3 - Release Date: 9/19/2005
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>> ==============================
>>> Search the US Census Collection. Over 140 million records added in the
>>> last 12 months. Largest online collection in the world. Learn more:
>>> http://www.ancestry.com/s13965/rd.ashx
>>>
>>>
>>>
>>> --
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>>> Checked by AVG Anti-Virus.
>>> Version: 7.0.300 / Virus Database: 267.11.3 - Release Date: 9/19/2005
>>>
>>>
>>
>>
>>
>> --
>> No virus found in this outgoing message.
>> Checked by AVG Anti-Virus.
>> Version: 7.0.300 / Virus Database: 267.11.3 - Release Date: 9/19/2005
>>
>>
>> ==============================
>> Search the US Census Collection. Over 140 million records added in the
>> last 12 months. Largest online collection in the world. Learn more:
>> http://www.ancestry.com/s13965/rd.ashx
>>
>>
>>
>> --
>> No virus found in this incoming message.
>> Checked by AVG Anti-Virus.
>> Version: 7.0.300 / Virus Database: 267.11.3 - Release Date: 9/19/2005
>>
>
>
>



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