Separating maternal matches from paternal matches

A problem that endogamy presents is when you have a match who matches you on both your paternal and maternal sides of the tree.  If you do not know how you are related, figuring out the connection is challenging.

Working out how matches for my mother are connected can be difficult.  Both of her parents were Kanaka Maoli.  So unless they have trees or I have the motivation to trace a match’s ancestors beyond what they already have, I usually would ignore the match. It takes a lot of work to distinguish if the match is related on my mother’s paternal or maternal side.

While it is only my mother who comes from an endogamous background, my father, on the other hand, was Filipino and I get very distant matches on that side.  And like my endogamous side, I pay no attention unless the match has a tree where I could figure out our connection.

Being from Hawai’i, I do encounter a lot of matches who are like me where they are part Filipino and part Kanaka Maoli.  I have seen a few matches whose trees indicated ties to the same island as my Filipino grandmother.  For their Hawaiian branches, they may or may not show the same geographic area where my Kanaka ancestors lived.  For the most part, we do tend to match on a DNA level because of the endogamous side as I mentioned earlier, the matches on my Filipino side are usually distant.

Here I demonstrate showing my closest cousins on my Filipino side, and how they can easily match up relatives on my Kanaka side.  Basically, my mother matches a few of my cousins on my father’s side.  It is because my Filipino cousins are also part Kanaka Maoli, and they are connecting to my mother via that side.  Of course, something like DNAPainter or Kitty Cooper’s Segment Mapper could be used to show which segments are from my father versus my mother.  But the point here is to just compare how my paternal cousins also match my maternal cousins.

Paternal cousins indicated in RED and maternal cousins in BLUE.

 

I indicate the relationship (for the ones without names) how they are related to me, e.g.  1st cousin (1C), 1st cousin twice removed (1C2R).

For my maternal cousins in blue, I list how much they share with my paternal cousins.  But for my mother and myself, I show how much we share with both my paternal and maternal cousins.  In some cases, my cousins on my mother’s side have other endogamous (Kanaka) lines so they might share more DNA than expected compared to another closer relative of theirs, or even to my mother.  For an example, take a closer look at cousin #6 and to their parent cousin #5.  Another example is cousin #3 and #4 compared to my mother.

In the example above I only used my close paternal cousins, and know how we connect.  But when dealing with distant matches and no trees, it will be difficult to differentiate paternal versus maternal matches.

This does not include recent pedigree collapse where I do have on my Filipino side cousins who share the same common ancestors more than once, or where I have cousins who are related to each other in more than one way.  This can also affect the amount of DNA shared.

Ancestry updates their ethnicity yet again

As of November 13, 2019, everyone’s AncestryDNA results were updated.  Back in late October, only a few people have been getting the new update and all new testees.  Now we are all on the same page.

They did several changes which include increasing the number of genetic communities for various populations, increasing the size of their reference samples, renaming of categories and adding in a few new categories such as Guam, Samoa and Tonga.

We are going to concentrate on Samoa and Tonga, which they attempted to split off from the rest of Polynesia.

When AncestryDNA created the Polynesia category back in December 2013, it only consisted of 18 Polynesian samples which included at least one (or possibly more) of the samples that have distant European ancestry.  They updated their category and rolled out the new update to everyone back on September 12, 2018 with an additional 40 more samples increasing to a total of 58 for Polynesia.

In June and December 2018, I had the opportunity to speak to David Turissini, Ph.D who is a population geneticist at AncestryDNA.  I expressed my concerns with him regarding more specific categories among Polynesians.  Basically splitting eastern from western Polynesia.  I also explained why I thought that would be much better for us particularly for matching as we all tend to match each other at a very closely predicted relationship.  And that I thought the low number of reference samples could possibly affect the way we get our results.

He told me that I already understood how Polynesians lack genetic diversity so increasing the number of samples would not make any difference.  But then I pointed out how it was not that difficult for me to distinguish a western Polynesian (Samoan, Tongan, Tokelau, Tuvalu) versus an eastern Polynesian (Maori, Tahitian, Cook Island Maori, Hawaiian, Marquesan, Rapa Nui).

Despite all that was said, I was surprised to see how they increased the number of reference samples for Polynesia along with adding in Samoa and Tonga.

New categories & increase of samples for Polynesia

You can read more about it here:

https://www.ancestry.com/cs/dna-help/ethnicity/estimates

So their reference samples of 16,638 has increased by 23,379 samples to a total of 40,017.  Of that amount, they added 130 more samples to the Polynesia category and creating Samoa with 73 and Tonga with 97 samples.

While I have not noticed a lot of Tongan results yet, I have seen several Samoans.  Most of the ethnicity results I have seen are either Hawaiians or Maoris.  For the most part, eastern Polynesians are getting either Samoa and/or Tonga in the range of 1% – 4%.  For Samoans, I’ve seen about 60% – 70% Samoa and the rest Tonga.  A few Cook Island Maoris seem to have a higher percentage of Samoa compared to other eastern Polynesians but that may be due to the fact that they have ties to Aitutaki or its neighboring islands versus Rarotonga.  Or maybe Cook Island Maoris just have a higher percentage because of another group of people that settled earlier and/or it could be due to the original people who just so happened were genetically more like Samoans.

This whole classification, while it cannot be accurate as it is nothing but an estimate, really makes it interesting and gives us a bit more of an insight as to the settling of Polynesia.  Of course we can also see this as more people are getting Y-DNA tested and mtDNA and we slowly learn more about these different migration patterns which no surprise, confirms our oral histories.

My results have changed throughout time since I tested with AncestryDNA back in January 2014.  The biggest breakthrough came last year as they actually created the Philippines category which correctly allocated my Filipino side from Polynesia, therefore decreasing my amount.

But what does my tree look like compared to my current DNA results?

 

With the latest update it made my color scheme more difficult to accomplish but in the tree I do point out the foreigners.  While my father was born in Lahaina, Maui, Hawai’i, both of his parents were from the Visayas region in the Philippines.  For my maternal grandmother’s mother – Rose Holbron, her paternal grandfather was from Hull, England while her maternal grandfather was from Queens, New York, U.S.A.  And for my maternal grandmother’s father – Frank Kanae, he had distant American ties.  His great-grandfather Isaac Lewis Kanae was the son of Captain Isaiah Lewis.  I still have not pinpointed his origin yet.  And Isaiah Lewis’ father-in-law Oliver Holmes arrived in the Hawaiian Islands in 1793 from Plymouth, Massachusetts.  At the time Oliver Holmes left Plymouth, there were only 15 states in the U.S.A.

So what I did was place their ethnicities under a continental level and compared it to my DNA results, which all adds fairly nicely, taking in random inheritance.  My mother gets 17% European compared to her sister who gets exactly 15% which is consistent with the genealogy.  And in turn my mother gave not one but both of my brothers about half of her European – 8% and 9% for them while I ended up with the higher percentage – 11% which appears as about 11% – 12% at different testing companies.

And while I show 2% Samoa, my mother ended up with 1% of both Samoa and Tonga.

 

For my cousin who is not admixed, it was interesting to see, despite the erroneous genetic communities that would come up, how hers changed.  Because we match other Polynesians at a very closely predicted relationship, and the fact that my cousin is not admixed, she matches a lot of part Polynesian people who fall into a specific genetic community among others of whom she also matches.  So she ends up with the same genetic community.

 

 

With this latest update, they finally got rid of the Native American category for both my cousin and my mother.  But now with Samoa and Tonga, it is no surprise that they would give us a small percentage of that.  And having gone through several of these 1% – 2% categories of Samoa and Tonga, they all seem to range the same – 1% – 4%.  Interestingly for my mother, her range for Tonga was 1% – 3% while her Samoa was 1% – 4%.  But the way it ended up was both 1%.

I have also been witnessing those who previously had small amounts of Polynesia now being reclassified as Samoa, Tonga or Guam.  Usually, these are people with either Melanesia or some other Southeast Asian from various parts of Indonesia.  I would be really interested in seeing more results who have ties to that area.

So while I was told the number of increase of samples would not do anything, it obviously did quite a bit.  If only they would have renamed the Polynesia category by specifying Eastern Polynesia.  They should also do the same renaming their genetic community.  It would make more sense as we know that both Samoa and Tonga is part of Polynesia and of course, their map for Polynesia would include Samoa and Tonga within that area.  I would have expected western Polynesia as I mentioned to them versus eastern Polynesia, but they really got very specific.  And in the end result, Samoans will see that they are about 30% Tongan and probably the same for Tongans where they will see a smaller percentage of Samoa.  These people do get about 0% – 1% Polynesia in their results.

We will just have to wait to see what the future updates would bring.

Previous entries about AncestryDNA’s Polynesia category:

https://hawaiiandna.wordpress.com/2014/12/15/polynesia-category-ancestrydna-com/

https://hawaiiandna.wordpress.com/2015/06/30/polynesia-category-ancestry-com-part-2/

MyHeritage Ethnicities

As of May 30, 2017, MyHeritage finally released their Ethnicity Estimate (beta) to those who uploaded their raw data.  So far this service is still free.  Not sure if they will discontinue that service.  Currently their tests are at a reduced price of $79.

 

Not only does MyHeritage (MH) have an Oceanian category but they included Polynesian along with Melanesian and Papuan.

 

Last year and probably the year before that, they reached out to people who had a tree at MH whose 4 grandparents were listed in a given geographic area confirming ties to that particular place or country.  And while they seem to have obtained more than Ancestry’s 18 Polynesian samples, they did not take into consideration that these people may be admixed.

A lot of admixed Polynesians who did test with MH are reporting to have lost a lot of their European while simultaneously having an increased percentage of Polynesian.  There seems to be about 10% difference.

Here are my mother, my maternal aunt and my own results.

Click for larger image

My mother and her sister are 85% Hawaiian while 15% is of European background.  My mother gets about 17% European at the varying DNA testing companies.

Several Polynesians have shared their Ancestry results with me.  Comparing it to MH it seems that the numerous samples that they used for the Polynesian category included some admixed Polynesians of European heritage.  I have been hearing the same situation for those with admixed Native American background reporting 20% to 30% more Native American while reducing the amount of European.

What is interesting about MH is that they did have other populations not covered by the other testing companies.  They separated the Melanesian and Papuan, commonly grouped together and labeled as “Oceanian” by other companies or at GEDmatch, and provided a separate Polynesian category.  They did something similar for the Asia group.

MH has specific groups within the Southeast Asia area, such as Filipino, Cambodian, Vietnamese, Thai, Malaysian and Indonesian.  While the thinking is that if you come from that particular background which they tested, you should score perfectly with that group.  This may not apply for some either due to the limited number of samples and/or where they got their samples from, such as taking samples from one specific area.  I have only seen a few Filipinos’ results where they score 100% Filipino/Indonesian/Malaysian.  A couple of Chinese people received majority Chinese and Vietnamese and a smaller percentage of Filipino/Indonesian/Malaysian.

My guess is that this breakdown of the various Southeast Asian groups helps separate Polynesians (and Micronesians) who also have some Southeast Asian background.  At Ancestry, Chinese people were reporting about 10% Polynesia, Vietnamese as high as 15% and Filipinos around 32%.  Ancestry has no Southeast Asian category, so those of Southeast Asian background will get some of the East Asian, or what Ancestry has as “Asia East” along with a small percentage of Polynesia.

Aside from MH engulfing the European for admixed Polynesians, it seems fairly accurate at least for me being that I am half Filipino and 43% Hawaiian and about 12% European background.  I am going to assume that the West Asian below is part of my European background while the South Asian is part of my Filipino backgroundc

New 5th Cousin connection helps map out chromosome!

HOW WE CONNECT

Now that I had figured out who my mother’s biological parents were it has become easier to find connections.  (You can read about it here: https://hawaiiandna.wordpress.com/2015/08/01/finding-a-dna-connection-despite-endogamy/)

While there is one branch where I find a lot of relatives on my great-grandmother Rose Holbron’s side, I am slowly finding distant connections on my great-grandfather Frank Kanae’s side.  Frank Kanae was Rose Holbron’s husband.

Earlier this week I received an email from a woman named Raychelle who saw me and my numerous kits of family members that I manage on GEDmatch.com as a match to her.  I began the normal response, almost ready to dismiss her since many of these matches appear to be close when in reality we are usually distant, and for others, much more distant.  And from what I could see, it wasn’t such a huge amount.  At GEDmatch, Raychelle and my mother shares 62.9cM total, with a large segment of 10.7cM.  So at least a 4th cousin level.

After I told her that she could find me on Ancestry (since she uploaded to GEDmatch via Ancestry) and look at my HOLBRON family tree, she found out that we have the LEWIS connection.

She is a 5th cousin to my mother, and a 5th cousin once removed (5C1R) to me.  I come from Isaac Lewis who was known as Isaac Lewis Kanae or Isaac Kanae Lewis, and also known by the Hawaiianized version – Aikake Lui.  While Raychelle comes from John George Lewis, and his Hawaiianized name was Keo Lui.  My assumption is that Keo was short for Keoki (George).  Keo could also be short for Keoni (John) and then there was the catholic version – Ioane for John.

But what was interesting is that she had this genealogy and I had updated mine from this to reflect what a couple of people have been researching.

According to the information that has been circulating at various sites on the internet, Isaac’s father – Captain Isaiah Lewis was the son of Captain Ezra Lewis.  And John G. Lewis was the son of Captain John Lewis, who was Captain Ezra Lewis’ son but through a different wife.  I listed them as spouse #1 and spouse #2 because different sites and people will switch the spouses showing Isaac as the son of one spouse, and another will show Isaac as the son of the other spouse, and vice versa for John G. Lewis.

Click to see larger image
So the question is, were Isaac and John full brothers, or (maternal) half-brothers?  And if they were (maternal) half-brothers, were their fathers paternal half-brothers?

While all of this information going back that far is based solely on people creating these trees without further documentation, for now I am only going by what was documented.  The trees habitually say that Polly was known as Sarah Pauline “Polly” Holmes.  While I can understand that Polly could be a diminutive for Paula and Mary, I’m not so sure that these are the same person, especially since a lot of the information lists this Sarah Pauline “Polly” Holmes having been born in Massachusetts and died there,  and that her husband Captain Isaac Lewis from Massachusetts too.

What we know for a fact according to testimonies from people who lived during the time of Polly Holmes and her father Oliver Holmes.

screen-shot-2016-12-02-at-12-32-31-pm

I am still in the process of confirming and documenting all of these ancestors, so for now I am considering Raychelle and I 5C1R, and that her 3x great-grandfather John George Lewis (Keo Lui) and my 4x great-grandfather Isaac Lewis Kanae (Aikake Lui) were full-brothers.

 

SHARED DNA SEGMENTS & CHROMOSOME MAPPING

I compared Raychelle to all of the relatives to see which segments we all had in common.  Any common segments or segments that multiple relatives share would indicate that segment was inherited from a common ancestor.  In this case, Polly Holmes and her husband Isaiah Lewis.

And while autosomal DNA inherited from our common ancestor can remain in our genome for about 5 – 6 generations, there are some cases where it can span several generations and for some as we have seen, in larger segments. These larger segments tend to be passed on within generations entirely intact and having not recombined.

With endogamy, that may confuse things as it isn’t guaranteed that the shared segment came from that same common ancestor.  Especially for Polynesians where we share many small segments.  And these multiple segments may not be in common with other relatives, or rather these segments may not overlap as what I am about to demonstrate.  So when looking to map out these segments, and at the 4x great-grandparent level, if the segments are really small, that may be suspect to being segments randomly inherited.  It may or may not be from the common ancestor, or may come from the same common ancestor multiple times through their different descendants.

I first compared my brother Kaimi and Raychelle and looked for the chromosomes that should match my mom.  Kaimi and I have different fathers, so I decided to use his to compare because his father is also Hawaiian.

I use Kaimi’s unphased and phased data to be sure that if there are extra segments that does not match our mother, then the presumption is that the segment came from Kaimi’s father.  These were the results.

screen-shot-2016-12-23-at-2-08-35-pm

You can easily see how with the phased data the size of the segment is somewhat smaller if it doesn’t remain the same or disappear altogether.

The real work comes in when I compare Raychelle to my mom’s brother’s son Chris, her half-brother’s daughter Lena and her maternal half-sister Aunty Stella.  The detailed specification of their relationship is to help you understand how they are related and know what is to be expected as far as sharing DNA with different relationships go.

What I did first was compare Raychelle to all of those family members mentioned and then see which of those matching segments actually matches up with what my mother matches.  Here’s a diagram of how we are related and descend from Isaiah Lewis and Polly Holmes.

screen-shot-2016-12-03-at-6-55-03-pm

I’ll start first with Chris, the son of my mother’s brother Joseph.

screen-shot-2016-12-04-at-7-33-00-am

While there were other segments that Raychelle shared with Chris, I am only comparing overlapping segments that are shared with my mom.  There are 3 chromosomes where they share overlapping segments.  Ch 6, 7 and 20.

With Aunty Stella, there were segments on different chromosomes, sometimes on the same chromosome but in different parts of the chromosome that did not overlap.

screen-shot-2016-12-04-at-7-45-56-am

Only one overlapping segment which is on ch 7.

Then with Lena, the daughter of my mom’s half-brother George.

Lena also shared different segments and different chromosomes with Raychelle that my mom does not have, except for ch 7.

So what is consistent with all of them is that a segment on chromosome 7 is shared with Raychelle.

The diagram above  shows how everyone matches each other, with the last one again showing my mom with Raychelle and that consistent block of segment.

So the fact that we all shared an overlapping segment in common with each other indicates that particular segment was inherited from our common ancestor.  In this case, both Isaiah LEWIS and Polly HOLMES.  But how do we figure out if that segment came from Isaiah vs. Polly?  Remember that there was a discrepancy that Polly’s two husbands – Isaiah LEWIS and John LEWIS were paternal half-brothers according to some other genealogy and that Isaac LEWIS KANAE was Isaiah’s son, while John George LEWIS was John LEWIS’ son.  Both Isaac and John had the same mother – Polly HOLMES.

The best way to distinguish that inherited segment being inherited from Isaiah LEWIS or Polly HOLMES is to test members of each of those families.  That would be distant relatives of whom we cannot find a connection to just yet.  Instead, I used another method.

Since my mother tested at 23andme, they have the ability to show the ancestry broken down by each chromosome. This is what my mother’s 7th chromosome looks like.

 

screen-shot-2016-12-03-at-7-36-33-pm

23andme identifies portions of the Hawaiian segments of the chromosome as a combination of East Asian & Native American, and Oceanian.  I simplified it by just indicating Hawaiian.  Both of my mother’s parents were Hawaiian, but her mother Rose KANAE also had European ancestry.  Which is why in that diagram one chromosome is labeled as the paternal chromosome, the other as the maternal.

My mother’s maternal grandmother was Rose HOLBRON.  Rose’s paternal grandfather John HALBORN was from Hull, England, and her maternal grandfather William LUDLUM was an American whaler from Jamaica, Queens, New York.  Rose HOLBRON’s grandmothers were Hawaiian (Kanaka).

But it is Rose KANAE’S father – Frank KANAE whose paternal grandmother Mary LEWIS KANAE’s father was Isaac LEWIS KANAE.  Isaac’s father was Captain Isaiah LEWIS.  Isaac’s mother Polly HOLMES was the daughter of Oliver Holmes of Kingston, Plymouth, Massachusetts and Mahi, daughter of the chief Kalanihooulumokuikekai of Ko’olau.  My assumption was that the European portion from Rose KANAE’s father is too far back.  In other words, the European portion of that chromosome that my mother inherited from her mother could have only come from John HALBORN or William LUDLUM, or a combination of both.

There are a few factors that could make a segment remain in tact for several generations:
1) The length of the chromosome.
2) How many cross-over events there were for that particular chromosome.
3) Location on the chromosome (some areas are more SNP dense than others).
4) The possibility of having fewer cross-over events or none at all (we see this happening as well).
This segment seems to match nicely ranging from 7.1cM (my mom) to 9.1cM (Aunty Stella) with all the relatives.

So when I visually compare the section of chromosome 7 that matches up with the shared overlapping segment for all of us, this is where they line up.


If you have read my other posts, you would have read that multiple segments for Polynesians can remain for awhile given that we come from a few common ancestors multiple times.  This paritcular segment had to have come via Polly HOLMES’ mother – Mahi who got it from her parents Kalanihooulumokuikekai and his wife.  And since Raychelle is also a descendant of Polly HOLMES and Isaiah LEWIS, this portion of chromosome 7 did not come from my HOLBRON side.

While my family members used for comparison descend from Isaac LEWIS KANAE’s daughter Mary LEWIS KANAE, there are other descendants through Mary’s sister Papanaha LEWIS KANAE who got DNA tested.  But only one of them was a match to Raychelle.

screen-shot-2016-12-04-at-4-00-56-pm

This cousin shares an overlapping segment of 8cM on chromosome #7.  But when I compared that relative to my mother, they did not share that particular overlapping segment, although all my other close relatives did share that overlapping segment with this cousin.  After looking into it further, I found out that my mother seemed to have inherited a smaller section of that overlapping segment compared to other family members, and her matching criteria just did not qualify as a match according to GEDmatch.com where all of this analysis was done.  After all, she shares the least out of all the relatives only 7.1cM of this segment and Aunty Stella shares 9.1cM.  And while she gave me and my brother Kaimi this segment, my brother Travis did not inherit this segment.  Which means this portion of chromosome 7 for him was from our grandfather, not our grandmother Rose KANAE.

But that is what is complicated about mapping out segments for Polynesians. These segments could be from any of these lines going back to the same common ancestor multiple times. That means that Raychelle could just so happen match all of us via my maternal grandmother Rose KANAE’s mother’s side, or my great-grandfather Frank KANAE’s mother’s side, or John KANAE’s father’s side, and so forth.  It could also be just by chance, that we share the segment with any other of her Hawaiian ancestors.

Since many Polynesians share multiple small segments and as small as 7cM, as well as having these segments line up very close to each other if not right next to each other, it makes chromosome mapping very difficult to do.  For example, I mentioned one of Papanaha LEWIS KANAE’s descendants share that same overlapping segment on chromosome 7 with the rest of us, while the other descendants  share multiple non-overlapping segments.  I cannot easily assign them to our common ancestor – Isaac LEWIS KANAE, or presume that all of these multiple segments came from our common ancestor.

Since Polly HOLMES is 6 generations away from my mom and all of her descendants share this same overlapping segment, it is safe to presume that this segment came from Polly HOLMES’ mother – Mahi.  And now I can assign at least this small portion to Mahi.

screen-shot-2016-12-04-at-4-11-13-pm

Some Runs of Homozygosity but no relation

Last year I blogged about GEDmatch’s “Are your parents related” where it looks for Runs of Homozygosity or identical alleles on paired chromosome that would indicate a possible close relative.

But now that I have found & confirmed my mother’s biological parents, I took a look again at GEDmatch’s “Are your parents related” tool to see their predicted genetic distance.

Are your parents related?
It estimated 4.1 generations to the MRCA (most recent common ancestor).  I normally do not go by GEDmatch’s predicted estimated number of generations but in this case because I cannot determine whether 51.5cM is a lot or not, and if 13.9cM largest segment plays a pivotal role or not, I am going by their estimated number of generations.

This is my mother’s genealogy.  I italicized all females.

Genealogy1) Mahi – Ko’olau, O’ahu
2) Kumahaulu – O’ahu
3) Kaapuiki – Kapa’ahu, Puna, Hawai’i
4) Piipii – Puna, Hawai’i
5) Naea – no information
6) Kamau – Hau’ula, O’ahu
7) Ehu – Mapulehu, Molokai
8) Kalahope -Pulama, Puna, Hawai’i
9) George – Kalapana, Puna, Hawai’i
10) Laahiwa – Kalapana, Puna, Hawai’i
11) Hookano – Honomuni, Molokai

These are my Kanaka or aboriginal Hawaiian ancestors.  The people I specifically chose were at the end of my genealogy branches.  I’ve listed their known origins with the names of the place (ahupua’a), district and/or island.  The main thing to look for is that both of my mother’s parents Joseph and Rose just do not have families coming from the same areas.

My grandfather Joseph’s family was from the island of Hawai’i.  Rose’s paternal grandfather John was from Molokai as well as his wife Hookano.  Ehu was also from Molokai while Kamau was from O’ahu.  It is not clear where John’s father Naea was actually from.

The point of all this is to show how contrary to predicted closeness with all of these DNA companies and even a tool to look for ROH, that there is still no known close connection to my grandparents.

East Asian category for Polynesians

My mother told me today that she received from the First District Circuit Court that handled her adoption, the non-indentifying form, which is where it lists her biological parents’ ancestries.  They indicated that both parents are Hawaiian and Chinese.  I find that to be an error since my mother had her DNA tested at 3 companies.  Maybe that was based on an assumption or the biological parents may not have known too much about their ancestries.

At the age of 5, she met her biological father and described him as a “pure Hawaiian.”  This made sense since she gets the following percentages from each company.

Screen Shot 2015-07-13 at 3.25.31 PM

 

So this meant that one parent was just Hawaiian while the other parent was admixed with some European.  Based on all the companies she has tested with and analysis [from Dr. McDonald], my mother gets the following averages.

European = 16%
Oceanian = 25%
East Asian = 55%

Those are based on 23andme, FTDNA’s old Population Finder and Dr. McDonald’s analysis.  FTDNA’s current myOrigin lumped their former Oceania category under Southeast Asia, or the more broader East Asian category.  AncestryDNA however created a Pacific Islander category with the subgroups Polynesia & Melanesia and between myOrigins and Ancestry, the average total is 83%.

In reality, the East Asia category is just one of two components that make up the genome of Polynesians.  The other is Melanesian/Papuan (Oceania).  For Polynesians, autosomally they are 79% East Asian and 21% Melanesian1.

In Population Genetic Structure and Origins of Native Hawaiians in the Multiethnic Cohort Study they applied ADMIXTURE on genome-wide SNP data to finely estimate the degree of admixture in Native Hawaiians.  They found that with Native Hawaiians, “an average of 32% and 68% of their genomes to be derived from Melanesian and Asian origins, respectively”.  But that “[r]ecently, Kayser et al. surveyed the nuclear genome with 377 microsatellite markers in 47 Pacific Islanders and identified 79% Asian and 21% Melanesian proportions of ancestry for Polynesians.”

So while other studies revealed that Polynesian genome consist of 79% Asian and 21% Melanesian components, the study with Hawaiians averaged 32% Melanesian and 68% East Asian2.  The higher amount of Melanesian could be attributed to the repeated bottleneck effects throughout the centuries specifically for eastern Polynesians, i.e. French Polynesians, Rapa Nui, Cook Island Maoris, Maoris from New Zealand and Hawaiians.

My mother averages 25% Oceanian and 55% East Asian.  The two combined equals 80%.  25% (Oceanian) is 31% of the entire Polynesian (80%) percentage.

Just over a year ago I was going through my mother’s matches on GEDmatch and began running their kits through various admixture tools to see their totals of Oceania versus East Asia.  I wanted to see if they fell within the 27% to 32% Melanesian/Papuan/Oceanian.

Screen Shot 2015-07-13 at 5.20.34 PM

This is only a partial list.  There are more lines on the bottom but I am just showing the first several.  I use various calculator admixture tools at GEDmatch that had the specific Oceania/Papuan/Melanesian category.  Dodecad World9 uses “Australian” instead. I created a column that totaled the average.  And the columns to the right of that shows those who tested at other companies and their Oceania percentages.  What is not shown in the list is the proportion of East Asian that would prove it does fall within the 27% – 32% Oceania.

The first row (in red) belongs to my mother, followed by my averages and then my brother’s.  The following lines in bold are for those at least 95% Polynesian.  I took the lowest and the highest percentages of Oceanian to see if it falls within the range consistent with the research.  Since these admixture calculators did not have just a single East Asia category alone, I listed the other categories that are known to split off from the East Asia category.

Eurogenes K9b
Oceania = 17.74%
Southeast Asian = 48.87%
Northeast Asian = 13.32%
Native American = 1.55%

Adding the Southeast Asian, Northeast Asian and Native American categories total 63.74%.  17.74% Oceanian makes up 27.8% of the total (East Asian compiled categories) of the Polynesian genome.  Consistent with the research.  Looking at the highest percentage.

MDLP World
Melanesian = 20.78%
East Asian = 56.31%
Artic Amerind = 1.65%
Mesoamerica = 0.13%

There was an Indian category showing 3.74%, but I did not add that in.  Adding it, changed the overall percentage to 33%, but leaving it out made it 35.7% of the Polynesian portion. For the others listed on that list, they also picked up a small 1 – 3% of the Indian category, and leaving it out made their average 30%.  If I look at the average column for all the admixture calculators for my mother, it comes out to 30%.

But what happens when there is a higher percentage of East Asian?  In my case, it is higher because my father was Filipino. My portion could easily be verified simply by removing 50% (my father’s contribution) from my average total of 85% East Asian giving me 35% East Asian that would be my Hawaiian/Polynesian side.  My average (GEDmatch) showed 32%.

There are many Hawaiians admixed with Chinese, Japanese, Filipino or Korean, being that they were all immigrant groups to the Hawaiian islands.  Are you able to tell if they have an Asian admixture?  Can it be distinguished from the East Asian that is part of the Polynesian genome?  This is something I have been seeing more now particularly with adoptees.

Any excess East Asian percentage  compared to the Oceanian percentage [79% to 21%], would indicate that the person is admixed with some other Asian ancestry.  Since my mother’s genome does not indicate any more East Asian than what it should for Polynesians, it is clear that she does not have any additional Asian ancestry.

Footnotes

1. Genome-Wide Analysis indicates More Asian than Melanesian Ancestry of Polynesians
2. Population Genetic Structure and Origins of Native Hawaiians in the Multiethnic Cohort Study