When the combined phenotypic effect of alleles at two or more loci deviates from the sum of their individual effects, this is referred to as a genetic interaction, or epistasis. Most biological traits ...
In our model, individuals are autopolyploid with either four (Y 4) or six (Y 6) sets of chromosomes (that is, 2n=4x=tetraploid; 2n=6x=hexaploid), but all populations must have the same ploidy level ...