Figure 1

The phylogenetic tree of the Y chromosome and the distribution of the patients and controls in different haplogroups.
Each vertical line represents one haplogroup of the Y chromosome phylogenetic tree. Totally 10 common haplogroups are shown and lined up from the older (C, DE, F*) on the left to the younger (O3e1) on the right. The upper symbols (M130, YAP, M89, M231, M175, M119, M268, M122, M134 and M117) are markers of the single nucleotide polymorphisms that define different haplogroups according to the Y chromosome Consortium nomenclature. The numbers in the table reflect the number and percentage of cases and controls, odds ratio, 95% confindence intervals and P value of each haplogroup in our study.