title: [Distribution of ABO blood group in Tibetan population and their genetic relationship].
abstract: OBJECTIVE
  To explore the distribution of ABO blood group in Tibetans population and their genetic relationship.
  
  
  METHODS
  Data of ABO blood group of 28 Tibetan populations were collected from China and India. The gene frequencies were processed by Phylip3.68 and MEGA4.1 genetic analysis software pack, and the Nei's genetic distance was imported and the genetic relationship was analyzed.
  
  
  RESULTS
  The distribution of ABO blood group among Gansu, Qianghai, Sichuan, Yunnan, Tibet, and India was O>A>B>AB. The nation index and genetic distance were 0.63-0.98 and 0-0.0072, respectively.
  
  
  CONCLUSIONS
  There is probable historical relationship among the ancestors of these Tibetan populations, but the differentiation incident of Tibetan population living in different area in history was different, so that their distribution of gene frequencies is diversified.
authors.affiliation: Department of Biochemistry, Qiannan Medical College for Nationalities, Guizhou, China. longyoug@sina.com
authors.forename: Youguo
authors.initials: Y
authors.lastname: Long
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Huang
authors.forename: Yuesheng
authors.initials: Y
authors.lastname: Yu
authors.forename: Sifang
authors.initials: S
authors.lastname: Long
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D002681:China / Q000208:ethnology; D005260:Female; D005787:Gene Frequency; D006801:Humans; D007194:India / Q000208:ethnology; D008297:Male; D018609:Tibet
chemical_list: D000017:ABO Blood-Group System