Evidence for a multi-allelic heterokaryon incompatibility (het) locus detected by hybridization among three heterokaryon-compatibility (h-c) groups of Aspergillus nidulans

A strain of heterokaryon-compatibility (h-c) group A was crossed sexually to strains of h-cB and h-cGL of Aspergillus nidulans. A back-crossing programme established that there were seven hetero-allelic heterokaryon compatibility (het) genes controlling somatic incompatibility between strains of h-c...

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Bibliographic Details
Published in:Heredity 1993-05, Vol.70 (5), p.537-543
Main Authors: Dales, R.B.G, Moorhouse, J, Croft, J.H
Format: Article
Language:English
Subjects:
Alleles
Animals
asexual reproduction
Aspergillus nidulans - genetics
Aspergillus nidulans - physiology
Aspergillus nidulellus
Biological and medical sciences
Biomedical and Life Sciences
Biomedicine
Classical genetics, quantitative genetics, hybrids
Crosses, Genetic
Cytogenetics
Ecology
Evolutionary Biology
Fundamental and applied biological sciences. Psychology
Genes, Fungal
Genetics of eukaryotes. Biological and molecular evolution
heterokaryosis
Human Genetics
hybridization
Hybridization, Genetic
incompatibility
Invertebrata
loci
original-article
Plant Genetics and Genomics
Spores, Fungal
strain differences
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Summary:A strain of heterokaryon-compatibility (h-c) group A was crossed sexually to strains of h-cB and h-cGL of Aspergillus nidulans. A back-crossing programme established that there were seven hetero-allelic heterokaryon compatibility (het) genes controlling somatic incompatibility between strains of h-cA and h-cB. A similar back-crossing programme between strains of h-cA and h-cGL confirmed that these two groups differ at six het loci. Previous work has shown that h-cB differs from h-cGL at two het loci, hetA on linkage group V and hetB on linkage group VI. As an allelic difference at a single het locus is enough to cause two strains to be heterokaryon incompatible, 15 alleles spread over seven het loci are necessary to explain the h-cA, h-cB, h-cGL triangular compatibility relationship. One het locus is multi-allelic and this locus must be either hetA or hetB.
ISSN:0018-067X
1365-2540
DOI:10.1038/hdy.1993.77