Genetic polymorphisms of DYF155S1 locus on human Y chromosome in both the Han population, China and the Japanese population / 中国法医学杂志

ABSTRACT

Objective To study the genetic polymorphisms of DYF155S1 locus in 107 unrelated individuals both in the Han population, China and the Japanese population. Methods MVR-PCR, automated fluorescence detection and DNA sequence analysis were carried out for studying. Results Five types of repeat unit and one type newly named type 6 which was resulted from the T22A substitution on Type 1 were detected. Type 6 is monopolized by Japanese and may be regarded as a racial characteristic genetic marker. The common arrangement of the repeat units was 3134 which were detected at 73.44 % and 67.44 % in the Han and Japanese populations respectively. The abundance of arrangement of 3134 is the character of yellow race. Next to the arrangement of 3134 was the arrangement of 134 which was detected at 17.19% in the Han population while the arrangement of 6134 was detected at 16.28% in the Japanese population. The average number of type 4 unit at the 3'terminal was 8.8 in the Japanese population much lower than 12.5 in the Han population. Conclusion This study implies that DYF155S1 locus is an important geneticmarker with good genetic polymorphisms. The population difference between the Han and the Janpanes is significant.