No abstract

No abstract

No abstract

316 adults and children from an isolated community of Bali, Indonesia, have been tested for 18 red cell enzyme systems controlled by 24 loci, and haemoglobin. 13 loci were invariant. The other 11 loci showed variations similar to those found previously in Southeast Asian populations. Of special interest is the occurrence of lactate dehydrogenase Calcutta-1 variants, indicating Indian gene admixture, and PGM⁹₂, indicating a Melanesian genetic component. A few individuals were CA₁ 1–3_Bali and this is possibly the same as other CA₁ 1–3 types found in the Philippines and Guam. Nearly 10% were glucose-6-phosphate dehydrogenase (G6PD) deficient and 2% carried Hb E. A fast electrophoretic variant of G6PD was detected in 5 persons. Two sub-groups of the population were studied. Gene frequencies in the Isolate supported the view that inbreeding and genetic drift have made this sub-group genetically distinct from the non-inbred part of the population.

320 adults and children of an isolated community of Bali, Indonesia, have been tested for blood groups ABO, Rh, MNS, P, Lewis, Duffy, Kell, for haptoglobin and transferrin and for hepatitis B surface antigen and antibodies. Phenotype distribution and gene frequencies are given for the total population tested and for two subgroups representative of the inbred population of the isolate and of the non-inbred part of the population. Significant differences between the two subgroups show a clear genetic drift in the inbred population. The study brings biological support to the ethnological hypothesis of population migrations in this area. Tests for hepatitis B surface antigen reveal a lower prevalence of the disease than in most other south-east Asian populations.

One hundred eighty‐two Balinese were typed for HLA‐A and ‐B locus antigens. From these, 103 were also typed for HLA ‐C, 51 for HLA‐DR, 172 for Bf and 173 for GLO. These results and the significant phenotypic associations are situated with respect to other South‐East Asian populations. In addition to this first study, 175 individuals from an isolated Balinese village typed for HLA‐A, ‐B, ‐DR, Bf and GLO are presented, The effect of isolation on haplotype (HLA‐A/‐B/Bf/‐DR) variability is discussed.

Serum samples from Bali, obtained in three different ethnic groups and in one isolated village were tested by isoelectric focusing electrophoresis for Gc, Pi, Tf and Hp subtyping. In addition to the three common alleles Gc1F, Gc1S and Gc2, two variants Gc1A1 and Gc1A8 were observed. In the Pi system, five alleles were present: PiM1, PiM2, PiM3, PiM4 and PiX. The Tf variability was exceptional with the presence of eight alleles: TfB1, TfC1, TfC2, TfC3, TfC4, TfC8, TfD1 and TfDchi. For Hp, there were two common alleles Hp1S and Hp1FS and two rare ones: Hp1F and Hp2SS. As expected, the genetic polymorphism is reduced in the isolated community. The anthropological significance of these genetic data is discussed.

No abstract