A detailed analysis of the recombination landscape of the button mushroom Agaricus bisporus var. bisporus

The button mushroom Agaricus bisporus var. bisporus retains most of its heterozygosity in the offspring by restricting recombination between homologs to chromosome ends and by combining non-sister nuclei in most of its offspring. The genotypes of the parental nuclei (A) and of a heterokaryotic single spore isolate (B) are almost identical except for a different distribution of chromosomes over the constituent nuclei and recombination at chromosome ends (C).203