Genetic variability and vegetative compatibility in Aspergillus niger isolated from various food substances in Benin City Nigeria

In this investigation, Aspergillus niger isolated from eight food substances, have been classified based on the absence of heterokaryon formation. The size their sporangia were differentiated, wild and mutant strains subjected to vegetative compatibility tests in order group them into different groups (VCGs) which include VCG-1, VCG-2, VCG-3 VCG-4. further tested for possible formation a stable using nit mutants generated potato dextrose agar (PDA) containing 2.5% chlorate (KClO3), represented as PDC. Based groups, paired minimal medium (MM) complementation test. Interestingly, there was with mycelia showing anastomoses but without heterokaryon. suggested four genotypes polymorphism het loci. A population study detailed genotyping is unravel genetic recombination A. niger.