ADMIX 2.0

Computing admixture coefficients from molecular data

Introduction Input files Output files In case of troubles Fixed bugs References Download

Introduction

The program Admix 2.0 can be used to compute the estimators mY initially described in Bertorelle & Excoffier (1998) and extended to any number of parental populations by Dupanloup & Bertorelle (2001).

Admix 2.0 runs on PC. The Apple version is not available yet. The number of different alleles for each locus is restricted to 1000 !


Input files


A possible data file for 2 parental populations and 3 loci could therefore look like:

1000
0.00005
2
3
LocA
4
0
1 0
4 1 0
9 4 1 0
LocB
5
0
1 0
4 1 0
9 4 1 0
25 9 4 1 0
LocC
2
0
1 0
LocA
30 24 27
3 6 0
3 12 3
15 3 15
9 3 9
LocB
51 30 36
9 0 12
9 6 0
30 6 21
0 9 0
3 9 3
LocC
30 30 24
12 21 6
18 9 18


Output files


In case of troubles

In case of any trouble using Admix 2.0, please contact I. Dupanloup, Institute of Ecology and Evolution, University of Bern. E-mail: isabelle.dupanloup@zoo.unibe.ch


Fixed bugs

August 2002: When 2 parental populations have the same allelic composition (in the observed samples or in bootstrapped samples), the software crashed. Now the program stops and a message error is given in the log file. Note that this problem is not linked to our software. It is impossible to estimate admixture proportions when 2 (or more) parental populations are genetically identical. Practically, one shall esclude 1 (or more) samples or pool the samples.


References


Isabelle Dupanloup, Institute of Ecology and Evolution, University of Bern