Introduction

J mtDNA Migration - From National Genographic

This blog is about Mitochondrial DNA Haplogroup J. Everyone has Mitochondria within their cells that convert energy from food into a form we can use. Each cell contains hundreds to thousands of mitochondria.

MtDNA is passed from mother to child. Males do not pass their mtDNA on to their children.

On occasion there are slight mutations. These changes are then passed on to children. These mutations allow us to trace our ancestry back in time on the maternal line. The changes enable you to identify your genetic mtDNA "cousins".

Haplogroup J descends from the haplogroup JT. In his book The Seven Daughters of Eve, Professor Bryan Sykes named the originator of this mtDNA haplogroup Jasmine.

    Editors Note -This blog is intended to integrate what we know about J mtDNA in one place. There are a number of sites that cover J mtDNA including two Facebook pages and a Yahoo page. They are excellent discussion pages but you get lost in the forest for the trees. Wikapedia and Eupedia provide interesting information. Other sites are buy profit companies, two of which have gone out of business with some loss of information.  We try to copy some of that info here without incurring the copyright wrath of the companies. 

J-mtDNA Links

Family Tree DNA Site about J mtDNA
https://www.familytreedna.com/groups/j-mt-dna/about

Wikapedia Article about Haplogroup J mtDNA

https://en.wikipedia.org/wiki/Haplogroup_J_(mtDNA) 

Eupedia Article about Haplogroup J mtDNA

https://www.eupedia.com/europe/Haplogroup_J_mtDNA.shtml

Family Pedia

https://familypedia.wikia.org/wiki/Haplogroup_J_(mtDNA)

Facebook Group about J mtDNA 

https://www.facebook.com/groups/6959054533/  

Facebook Group about J mtDNA 

https://www.facebook.com/pages/category/Community/Haplogroup-J-mtDNA-116642511702696/

Geni.com Site about J mtDNA  

https://www.geni.com/projects/J-mtDNA/8529

Frontiers in Neuroscience

https://www.frontiersin.org/articles/10.3389/fnins.2018.00682/full

 

 

DNA Explained - Genetic Genealogy

https://dna-explained.com/2017/05/09/mitochondrial-dna-your-moms-story/

Testing Sites - Companies Provide Testing for MtDNA

Autosomal, mtDNA, and Y-DNA Tests Offered

https://www.familytreedna.com/products/mt-dna

JmtDNA Info From Eupedia

"Te mutation defining haplogroup J is thought to have 

The interesting map above from Eupedia shows distribution of J mtDNA. Darker colors show higher density. It appears that the origin was in the middle east. And distribution seems to be allong the mediteranean - the boot of Italy, Sardinia, Catalonia, whe western portion of the United Kingdom, and Denmark. This looks like a movement by ships. More from Eupedia below:

"The mutation defining haplogroup J is thought to have taken place some 45,000 years ago, probably in West Asia. It is estimated that J2 split first from J* around 37,000 years ago, followed by J1 some 33,000 years ago. Between the Last Glacial Maximum (c. 26,500 to 19,000 years before present) until the end of the last glaciation (c. 12,000 years ago), J lineages branched off in seven main subclades: J1b (± 23,000 ybp), J1c (± 16,500 ybp), J1d (± 20,000 ybp), J2a1 (± 16,500 ybp), J2a2 (± 20,500 ybp), J2b1 (± 15,500 ybp) and J2b2 (± 11,000 ybp). Note that the current nomenclature does not include any subclade called J1a anymore (the previous J1a was renamed J1b3a).”

“Haplogroup J is relatively evenly distributed across all Europe. The only population in which it is absent are the Saami from Lapland. The highest frequencies of mtDNA J in Europe are found in Cornwall (20%), Wales (15%), Iceland (14%), Denmark (13.5%), Sardinia (13%), Scotland (12.5%), England (11.5%), Switzerland (11.5%), the Netherlands (11%) and Romania (11%).” 

“In the Middle East, it is most common in Saudi Arabia (21%), followed by Kuwait (16%), Yemen (15%), Kurdistan (15%), south-west Iran (14%), Iraq (13%), and the United Arab Emirates (12%). Local peaks are also observed among some Caucasian ethnic groups, such as the North Ossetians (16%) and the Dargins (11%).”

Click to read more at

 

https://www.eupedia.com/europe/Haplogroup_J_mtDNA.shtml

J-mtDNA - From National Genographic - No Longer Acrive

The common direct maternal ancestor to all women alive today was born in East Africa about 180,000 years ago. Though not the only woman alive at the time, hers is the only line to survive into current generations.

From East Africa, groups containing this lineage spread across Africa. Between 60 and 70 thousand years ago, some groups moved from Africa to Asia. Your line traces to one of these groups.

Around 32,000 years ago, your line was born in West Asia. There, your ancestors lived through the Paleolithic and the last glacial maximum. At the end of the last ice age, the beginning of settled agriculture triggered a population expansion among members of this line, but their story was just beginning.The map below shows how your female ancestors distributed around the world.

INTRODUCTION TO YOUR STORY

We will now take you back through the stories of your distant ancestors and show how the movements of their descendants gave rise to your lineage.

Each segment on the map above represents the migratory path of successive groups that eventually coalesced to form your branch of the tree. We start with the marker for your oldest ancestor, and walk forward to more recent times, showing at each step the line of your ancestors who lived up to that point.

What is a marker? Each of us carries DNA that is a combination of genes passed from both our mother and father, giving us traits that range from eye color and height to athleticism and disease susceptibility. As part of this process, the Y-chromosome is passed directly from father to son, unchanged, from generation to generation down a purely male line. Mitochondrial DNA, on the other hand, is passed from mothers to their children, but only their daughters pass it on to the next generation. It traces a purely maternal line.

The DNA is passed on unchanged, unless a mutation—a random, naturally occurring, usually harmless change—occurs. The mutation, known as a marker, acts as a beacon; it can be mapped through generations because it will be passed down for thousands of years.

When geneticists identify such a marker, they try to figure out when it first occurred, and in which geographic region of the world. Each marker is essentially the beginning of a new lineage on the family tree of the human race. Tracking the lineages provides a picture of how small tribes of modern humans in Africa tens of thousands of years ago diversified and spread to populate the world.

By looking at the markers you carry, we can trace your lineage, ancestor by ancestor, to reveal the path they traveled as they moved out of Africa. Our story begins with your earliest ancestor. Who were they, where did they live, and what is their story? The MtDNA shared by Beth and Serena and their descendants and ancestors on the female line are "J", called Jasmine. The MtDna is passed from mother to child with very minimal changes.

Human mtDNA Origin and Distribution

 

Human mtDNA Origin and distribution

The map illustrates the evolution and migration of individuals by mDNA. Our ancestors originated in Africa and slowly migrated around the world. Mutations in mtDNA occurred which were passed down to descendants. The table shows the estimated origin date of mtDNA mutations.

Family Tree DNA is a DNA testing company and has a great deal of interesting information on their site.

Click to view their page.

https://www.familytreedna.com/groups/j-mt-dna/about

J-mtDNA Origin Map - Wikapedia

 

The map about from Wikapedia shows the percentage of people with J-mtDNA.  Read more at:

https://en.wikipedia.org/wiki/Haplogroup_J_(mtDNA)

 Haplogroup J was formed someplace in the Middle East and its branches are found primarily in the Mediterranean, Europe and western Asia today, plus, of course, diaspora regions like the Americas, Canada, Australia and New Zealand.

The mitochondrial Haplogroup J Project at Family Tree DNA provides a map of the most distant known ancestors of Haplogroup J members, including all branches, shown below.

My branch, haplogroup J1c2f, a rare haplogroup, is found in a much more restricted geography. It has taken 10 years or so to accumulate 10 pins on the map.  Of course, there would be more if everyone tested and joined their haplogroup project.

How Old is Haplogroup J?

With the mtFull Sequence test, you receive a lot more information than with the mtPlus test, for not a lot more investment, as you can see in the chart below and as we work through results.

Haplogroup	Born Years Ago	Receive With Test
J	34,000	mtPlus
J1	27,000	mtFull Sequence
J1c	13.000	mtFull Sequence
J1c2	10,000	mtFull Sequence
J1c2f	1,000	mtFull Sequence

Click to Read Much More on this excellent site:

https://dna-explained.com/2017/05/09/mitochondrial-dna-your-moms-story/