Skip to main content

Advertisement

Table 4 Estimates of demographic parameters in the Southwest and Southeast edges of the Bantu expansions

From: On the edge of Bantu expansions: mtDNA, Y chromosome and lactase persistence genetic variation in southwestern Angola

  N1 N2 NA m1 m2 2N1m1 2N2m2 t (years)
Y chrom         
  10020 5510 1195 0 0 0 0 1950
  (6684–21557) (3313–12057) (647–2372) (0–4 × 10-3) (0–6 × 10-3) (0–80.2) (0–66.1) (1388–2940)
mtDNA         
A 33212 31885 7090 2.6 × 10-4 5.5 × 10-4 17 35 25410
  (22680–44905) (23592–46315) (3441–16129) (9.0 × 10-5-4.5 × 10-3) (2.8 × 10-4-4.7 × 10-3) (6–297) (18–298) (14612–39135)
B 35700 30558 7173 2.4 × 10-4 3.0 × 10-3 17 184 24978
  (24256–46066) (23055–46315) (3607–17041) (5.0 × 10-5-3.9 × 10-3) (4.5 × 10-4-4.8 × 10-3) (4–275) (21–296) (13749–38319)
Joint         
A 6894 6150 1394 2 × 10-3 7 × 10-3 28 86 4133
  (4631–9571) (4403–8619) (343–2246) (4.7 × 10-4-1.6 × 10-2) (1.4 × 10-3-1.6 × 10-2) (6–215) (17–191) (3071–13384)
B 7558 6274 1372 1 × 10-3 9 × 10-3 15 113 3981
  (5417–9929) (4884–8578) (933–2433) (4.5 × 10-4-1.1 × 10-2) (4.5 × 10-4-1.5 × 10-2) (7–211) (6–185) (3147–6332)
  1. N1-Current effective population size in the Southwest edge; N2-Current population size in the Southeast edge; NA-Ancestral effective population size; m1-Probability of migration from Southeast to Southwest Africa, per gene copy per generation; m2-Probability of migration from Southwest to Southeast Africa, per gene copy per generation; 2N1m1-Effective number of genes migrating into Southwest Africa, per generation; 2N2m2-Effective number of genes migrating into Southeast Africa, per generation; t-time since divergence from a common ancestor. 95% credibility intervals are given in parentheses. A and B show the outcome of runs with different probability density peaks for m2.