Brief communication: New Y-chromosome binary markers improve phylogenetic resolution within haplogroup R1a1

2012 ◽  
Vol 149 (4) ◽  
pp. 611-615 ◽  
Author(s):  
Horolma Pamjav ◽  
Tibor Fehér ◽  
Endre Németh ◽  
Zsolt Pádár
Keyword(s):  
Y Chromosome ◽  
Phylogenetic Resolution ◽  
Binary Markers

Male contribution in the constitution of the Brazilian Centro-Oeste population estimated by Y-chromosome binary markers

2006 ◽  
Vol 1288 ◽  
pp. 228-230 ◽  
Author(s):  
R. Barcelos ◽  
G. Ribeiro ◽  
W. Silva ◽  
K. Abe-Sandes ◽  
N. Godinho ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Binary Markers

scholarly journals Improved phylogenetic resolution for Y-chromosome Haplogroup O2a1c-002611

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Xiaotian Yao ◽  
Senwei Tang ◽  
Beilei Bian ◽  
Xiaoli Wu ◽  
Gang Chen ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Phylogenetic Resolution

Y Chromosome Binary Markers to Study the High Prevalence of Males in Sardinian Centenarians and the Genetic Structure of the Sardinian Population

2001 ◽  
Vol 52 (3) ◽  
pp. 136-139 ◽  
Author(s):  
Giuseppe Passarino ◽  
Peter A. Underhill ◽  
L. Luca Cavalli-Sforza ◽  
Ornella Semino ◽  
Giovanni M. Pes ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Y Chromosome ◽  
High Prevalence ◽  
Sardinian Population ◽  
Binary Markers

scholarly journals Improved phylogenetic resolution and rapid diversification of Y-chromosome haplogroup K-M526 in Southeast Asia

2014 ◽  
Vol 23 (3) ◽  
pp. 369-373 ◽  
Author(s):  
Tatiana M Karafet ◽  
Fernando L Mendez ◽  
Herawati Sudoyo ◽  
J Stephen Lansing ◽  
Michael F Hammer
Keyword(s):  
Southeast Asia ◽  
Y Chromosome ◽  
Phylogenetic Resolution ◽  
Rapid Diversification

scholarly journals Rare Deep-Rooting Y Chromosome Lineages in Humans: Lessons for Phylogeography

Genetics ◽  
2003 ◽  
Vol 165 (1) ◽  
pp. 229-234
Author(s):  
Michael E Weale ◽  
Tina Shah ◽  
Abigail L Jones ◽  
John Greenhalgh ◽  
James F Wilson ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Geographic Origin ◽  
Genealogical Tree ◽  
Branching Order ◽  
Considerable Debate ◽  
Binary Markers ◽  
Human Y Chromosome

Abstract There has been considerable debate on the geographic origin of the human Y chromosome Alu polymorphism (YAP). Here we report a new, very rare deep-rooting haplogroup within the YAP clade, together with data on other deep-rooting YAP clades. The new haplogroup, found so far in only five Nigerians, is the least-derived YAP haplogroup according to currently known binary markers. However, because the interior branching order of the Y chromosome genealogical tree remains unknown, it is impossible to impute the origin of the YAP clade with certainty. We discuss the problems presented by rare deep-rooting lineages for Y chromosome phylogeography.

Sex determination and Y chromosome constitutive heterochromatin

2019 ◽  
Vol 1 (1) ◽  
pp. 1-5
Author(s):  
Abyt Ibraimov
Keyword(s):  
Sex Determination ◽  
Y Chromosome ◽  
Constitutive Heterochromatin ◽  
Sex Differentiation ◽  
Secondary Sexual Characteristics ◽  
Biological Meaning ◽  
Heterochromatin Block ◽  
Sexual Characteristics ◽  
Open Question ◽  
Efficient Elimination

In many animals, including us, the genetic sex is determined at fertilization by sex chromosomes. Seemingly, the sex determination (SD) in human and animals is determined by the amount of constitutive heterochromatin on Y chromosome via cell thermoregulation. It is assumed the medulla and cortex tissue cells in the undifferentiated embryonic gonads (UEG) differ in vulnerability to the increase of the intracellular temperature. If the amount of the Y chromosome constitutive heterochromatin is enough for efficient elimination of heat difference between the nucleus and cytoplasm in rapidly growing UEG cells the medulla tissue survives. Otherwise it doomed to degeneration and a cortex tissue will remain in the UEG. Regardless of whether our assumption is true or not, it remains an open question why on Y chromosome there is a large constitutive heterochromatin block? What is its biological meaning? Does it relate to sex determination, sex differentiation and development of secondary sexual characteristics? If so, what is its mechanism: chemical or physical? There is no scientifically sound answer to these questions.

Detection Y Chromosome Microdeletions Among Iraq Population in Infertile Patients with Azoospermia and Severe Oligospermia

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Samah A Hammood ◽  
Alaauldeen S M AL-Sallami ◽  
Saleh M Al-Khafaji
Keyword(s):  
Y Chromosome ◽  
Karyotype Analysis ◽  
Semen Analysis ◽  
Obstructive Azoospermia ◽  
Severe Oligozoospermia ◽  
Infertile Men ◽  
Y Chromosome Microdeletions ◽  
Detailed Evaluation ◽  
Health Organization ◽  
Infertile Patients

Objective: To detection of microdeletions of Y chromosome and study the frequency of microdeletions in infertile men with non-obstructive azoospermia or severe oligozoospermia(Middle Euphrates center)in Iraq population. Material and methods: 153 males were included in the study, the casesweredivided into groups according to the infertility etiology and semen analysis according to Word health organization, the frequencies and the characteristicsof Y chromosome microdeletions were investigated in groups. Multiplex PCR was applied to detect the microdeletions. Results:Y chromosome microdeletion was detected in 42 (40.7%) of 153 cases ,Microdeletions in azoospermia showed more frequently detected 28 (52.8%), followed by severe oligospermia 14 (28 %),Microdeletions in the AZFc region were the most common 12 (22.64%), followed by AZFb 11(20.75%) and AZFa 5(9.43%) in azoospermia compared to severe oligospermisAZFc 6 (12%) AZFb 4 (8 %) and AZFa 4 (8%). Conclusion: Y chromosome microdeletions were detected quite frequently in certain infertility subgroups. Therefore, detailed evaluation of an infertile man by physical examination, semen analysis, hormonal evaluationsand when required, karyotype analysis may predict the patients for whom Y chromosome microdeletionanalysis is necessary and also prevent cost increases. Recommendation: This study emphasizes that analysis of microdeletions should be carried out for all patients with idiopathic azoospermia and severe oligospermia who are candidates for intracytoplasmic sperm injection

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