Y-DNA Haplogroup J and its Subclades

FTDNA's Haplotree http://ytree.ftdna.com/index.php?name=Draft&parent=89159733 

J-L24 FTDNA Draft tree  http://ytree.ftdna.com/index.php?name=Draft&parent=56436509

Y-DNA haplogroup J evolved in the ancient Near East and was carried into North Africa, Europe, Central Asia, Pakistan and India. J2 lineages originated in the area known as the Fertile Crescent. The main spread of J2 into the Mediterranean area is thought to have coincided with the expansion of agricultural peoples during the Neolithic period. 

The timing of the demographic events that brought J2 to Central Asia, Pakistan, and India is not yet known. J1 lineages may have a more southern origin, as they are more often found in the Levant region, other parts of the Near East, and North Africa, with a sparse distribution in the southern Mediterranean flank of Europe, and in Ethiopia.

There is a descending gradient in the frequency of occurrence of haplogroup J from the Middle East toward the northwest of Europe, reaching about 3% of the population on the northwest Atlantic coast. The occurrence of J in Europe is undoubtedly due both to the Neolithic expansion and to episodic migrations, though the relative proportion of those two sources is controversial and may not be the same in different locations.

A significant fraction of Jews belong to haplogroup J, but Jews represent a small minority of the European members of the haplogroup. The "Cohen Modal Haplotype" is a specific set of six Y-STR marker values that occurs in both J1 and J2, though at a much higher frequency in J1.

There are also studies indicating that J2 may have spread along the shores of the Mediterranean by the Phoenicians.

Adams et al, The Genetic Legacy of Religious Diversity and Intolerance: Paternal Lineages of Christians, Jews, and Muslims in the Iberian Peninsula, American Journal of Human Genetics, 83(6): 725-36, 2008.
Alonso et al, The Place of the Basques in the European Y-chromosome Diversity Landscape. (available by subscription) European Journal of Human Genetics, 13:1293-1302, 2005.
Athey T W, Schrack B E, A New Subclade of Y Haplogroup J2b. (pdf) Journal of Genetic Genealogy, 4(1):27-34, 2008.
Behar et al, Contrasting Patterns of Y Chromosome Variation in Ashkenazi Jewish and Host Non-Jewish European Populations. (pdf) Hum Genet 114:354-365, 2004.
Capelli et al, Population Structure in the Mediterranean Basin: A Y Chromosome Perspective. (pdf) Annals of Human Genetics, 2005.
Cinnioglu et al, Excavating Y-chromosome Haplotype Strata in Anatolia. (pdf) Human Genetics. 114:127-148, 2004.
Cruciani et al, A Back Migration from Asia to Sub-Saharan Africa Is Supported by High-Resolution Analysis of Human Y-Chromosome Haplotypes. American Journal of Human Genetics, 70:1197-1214, 2002.
Cruciani et al, Tracing Past Human Male Movements in Northern/Eastern Africa and Western Eurasia: New Clues from Y-Chromosomal Haplogroups E-M78 and J-M12. (pdf) Molecular Biology and Evolution 24(6):1300-1311, 2007.
Di Giacomo et al, Y Chromosomal Haplogroup J as a Signature of the Post-Neolithic Colonization of Europe. (pdf) Human Genetics, 115:357-371, 2004.
Flores et al, Reduced Genetic Structure of the Iberian Peninsula Revealed by Y-chromosome Analysis: Implications for Population Demography. (available by subscription) European Journal of Human Genetics, 12:855-863, 2004.
Karafet et al, New Binary Polymorphisms Reshape and Increase Resolution of the Human Y-Chromosomal Haplogroup Tree. Abstract. Genome Research, published online April 2, 2008. Supplementary Material.
Karafet et al, Paternal Population History of East Asia: Sources, Patterns, and Microevolutionary Processes. (pdf) American Journal of Human Genetics, 69:615-628, 2001.
King et al, The Coming of the Greeks to Provence and Corsica: Y-Chromosome Models of Archaic Greek Colonization of the Western Mediterranean, BMC Evolutionary Biology, 11: 69, 2011.
King et al, Differential Y-chromosome Anatolian Influences on the Greek and Cretan Neolithic. (abstract) Annals of Human Genetics. 72:205–214. 2008.
Kivisild et al, The Genetic Heritage of the Earliest Settlers Persists in Both Indian Tribal and Caste Populations. (pdf) American Journal of Human Genetics, 72:313-332, 2003.
Myres et al, (2007), Y-chromosome Short Tandem Repeat DYS458.2 Non-concensus Alleles Occur Independently in Both Binary Haplogroups J1-M267 and R1b3-M405. Croatian Medical Journal, 48, 2007.
Nasidze et al, MtDNA and Y-chromosome Variation in Kurdish Groups. (abstract) Annals of Human Genetics, 69:401-412, 2005.
Nasidze et al, Testing Hypotheses of Language Replacement in the Caucasus: Evidence from the Y-chromosome, Human Genetics 112 (3): 255-61, 2003.
Regueiro et al, Iran: Tricontinental Nexus for Y-Chromosome Driven Migration. (abstract) Human Heredity, Vol. 61, No 3, 132-143, 2006.
Semino et al, Ethiopians and Khoisan Share the Deepest Clades of the Human Y-Chromosome Phylogeny. (pdf) American Journal of Human Genetics, 70:265-268, 2002.
Semino et al, Origin, Diffusion, and Differentiation of Y-Chromosome Haplogroups E and J: Inferences on the Neolithization of Europe and Later Migratory Events in the Mediterranean Area. (pdf) American Journal of Human Genetics, 74:1023-1034, 2004.
Sengupta et al, Polarity and Temporality of High Resolution Y-chromosome Distributions in India Identify Both Indigenous and Exogenous Expansions and Reveal Minor Genetic Influence of Central Asian Pastoralists. (pdf) American Journal of Human Genetics, 78:202-221, 2006.
Shen et al, Reconstruction of Patrilineages and Matrilineages of Samaritans and other Israeli Populations from Y-Chromosome and Mitochondrial DNA Sequence Variation. (pdf) Human Mutation, 24:248-260, 2004.
Zalloua et al, Y Chromosome Diversity in Lebanon is Structured by Recent Historical Events. (abstract) The American Journal of Human Genetics, Volume 82, Issue 4, 873-882, 28 March 2008.
Zalloua et al, Y Chromosome Diversity in Lebanon is Structured by Recent Historical Events. (abstract) The American Journal of Human Genetics, Volume 82, Issue 4, 873-882, 28 March 2008.
Additional Resources:
The Y-Haplogroup J DNA Project, Bonnie Schrack and Tim Janzen.
J1b (J-M365) Haplogroup Y-DNA Project, Ricardo Costa de Oliveira.
J1c3 Haplogroup Y-DNA Project, Jaber Al Haddad.
J1c3d1 (J-L222.2) Haplogroup Y-DNA Project,
J2 Haplogroup Y-DNA Project, Angela Cone.
J2 Haplogroup Arab Y-DNA Project, Kamal Al-Gazzah.
J2 Haplogroup Jewish Y-DNA Project, Debra Katz.
The J2b-M102 DNA Project, Roman Sychev.
J2b (455=8) Y-DNA Project,
J2Plus Project, Donn Devine.
J-L24 Y-DNA Project, Alfred Aberto, Debra Katz, Tim Janzen, Kamal Al-Gazzah.