Saha N, Tay J, Piplai C, Gupta R, Roy S K
Department of Biochemistry, National University of Singapore.
Am J Phys Anthropol. 1988 Jul;76(3):321-30. doi: 10.1002/ajpa.1330760306.
A total of 334 Oraons of both sexes from two localities in eastern India were tested for 11 polymorphic and six monomorphic blood genetic markers. The sample comprised 130 sedentes from the Gumla district in Bihar and 204 migrants to the Jalpaiguri district of North Bengal. At the hemoglobin locus one example of HbAS was observed in the Gumla sample, while two cases of HbAS were found in the Jalpaiguri group. The Oraons are a distinct tribe and are characterized by a very low frequency of Hp1, TFC2, and a high frequency of TfD1 and GcIF at the serum protein loci. In the red cell enzyme systems the Oraons have a higher frequency of pa at the acid phosphatase locus and GLO1 at the Glyoxalase I locus. Absence of red cell lactate dehydrogenase and very low HbS and GdB- is also characteristic of the Oraons. A probable new nondeficient slow variant of Gd has been observed in polymorphic frequency in the Oraons of Gumla. There was an excess of homozygotes at the Gc locus. No significant difference in the gene frequency between the two groups of Oraons was observed at any of the loci. Genetic distance estimates using the gene frequency data indicate that the Oraons of the two localities are genetically homogeneous and form one cluster with the Bhils. They are nearer to the Irula and Kurumba tribes of the Nilgiris rather than the other Dravidian tribes, Tamils, or Nayars.
对来自印度东部两个地区的334名男女奥拉昂人进行了11种多态性和6种单态性血液遗传标记的检测。样本包括来自比哈尔邦古姆拉地区的130名定居者和迁移到北孟加拉邦 Jalpaiguri 地区的204名移民。在血红蛋白位点，古姆拉样本中观察到1例 HbAS，而在 Jalpaiguri 组中发现2例 HbAS。奥拉昂人是一个独特的部落，其特征是血清蛋白位点上Hp1、TFC2的频率非常低，而TfD1和GcIF的频率很高。在红细胞酶系统中，奥拉昂人在酸性磷酸酶位点的pa频率较高，在乙二醛酶I位点的GLO1频率较高。红细胞乳酸脱氢酶缺失以及极低的HbS和GdB - 也是奥拉昂人的特征。在古姆拉的奥拉昂人中观察到一种可能的新的非缺陷型Gd慢变体，其多态性频率较高。在Gc位点纯合子过多。在任何位点上，两组奥拉昂人的基因频率均未观察到显著差异。利用基因频率数据进行的遗传距离估计表明，两个地区的奥拉昂人在遗传上是同质的，并与比尔人形成一个聚类。他们更接近尼尔吉里斯的伊鲁拉人和库伦巴部落，而不是其他达罗毗荼部落、泰米尔人或纳亚尔人。
