
%0 Journal Article
%A Imrie, BC 
%A J Kirkman, Colleen 
%A Ross, DR 
%T Computer Simulation of a Sporophytic Self-Incompatibility Breeding System
%J Australian Journal of Biological Sciences
%D 1972/04/01
%V 25
%N 2
%P 343-350
%K 
%R https://doi.org/10.1071/BI9720343
%U https://www.publish.csiro.au/paper/BI9720343 
%X A sporophytic self· incompatibility system, such as occurs in Carthamus jlavescens Spreng., was studied by computer simulation. Equilibrium gene fre-quencies in an infinite population were estimated for three-allele and six-allele systems and found to be independent of initial frequencies. In a species existing as a series of more or less isolated small populations genetic drift caused rapid loss of alleles. Maintenance of the S allele system was enhanced by increased population size, and particularly by migration, by which alleles lost from one local population could be re-introduced from adjacent populations. Hard seed carryover had a lesser effect. 
