Heterokaryon incompatibility and variation in wild populations of Aspergillus nidulans

Jinks, J L; Caten, C. E.; Simchen, Giora; Croft, J. H.

doi:10.1038/hdy.1966.20

Cited by 72 publications

(39 citation statements)

References 13 publications

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“…The means of both the L-and 0-type crosses are lower than the mean of the GL-type which is in turn slightly lower than that of the G-type crosses. These results are in general accord with the findings of Jinks et al (1966). The analysis of variance adopted tests whether or not these differences are significant and have any genetic basis.…”

Section: Results (I) Diallel Crosssupporting

confidence: 85%

“…The criterion for the selection of these crosses was the availability of relevant information. The six crosses described by Jinks et al (1966) are The basic aim in considering these data is to investigate any possible relationships between genetic differences between parents and the occurrence of non-allelic interactions. The manifestation of such non-allelic interactions is measured by the difference between the mean growth rate of the parents and the mean growth rate of their progeny ([i], see section (iii) below).…”

Section: Results (I) Diallel Crossmentioning

confidence: 99%

“…Jinks et al (1966) found, however, evidence of reduced vigour in growth rate (presumably a fitness character) amongst the progeny of crosses between heterokaryon incompatible parents and expressed a doubt as to whether such progeny would be able to establish themselves in the natural environment in competition with their more vigorous parents.…”

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confidence: 99%

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Non-allelic interactions and genetic isolation in wild populations of Aspergillus nidulans

Butcher

1969

Heredity

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Section: Results (I) Diallel Crosssupporting

confidence: 85%

Section: Results (I) Diallel Crossmentioning

confidence: 99%

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Non-allelic interactions and genetic isolation in wild populations of Aspergillus nidulans

Butcher

1969

Heredity

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“…In A. nidulans somatic incompatibility is regulated by heterokaryon incompatibility genes (het genes : Jinks & Grindle, 1963). When two strains have different alleles for one or more het genes they are somatically incompatible (Jinks et al, 1966). When two strains have a different allele for a partial-het gene they are partially somatically incompatible (Coenen et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the spread of double-stranded RNA viruses in Aspergillus nidulans

Coenen¹,

Kevei²,

Hoekstra³

1997

Genet. Res.

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SummaryViruses are common in asexual Aspergilli but not in sexual Aspergilli. We found no viruses in 112 isolates of the sexual Aspergillus nidulans. We have investigated factors that could play a role in preventing the spread of mycoviruses through populations of A. nidulans. Experiments were performed with A. nidulans strains infected with viruses originating from A. niger. Horizontal virus transmission was restricted but not prevented by somatic incompatibility. Viruses were transmitted vertically via conidiospores but not via ascospores. Competition experiments revealed no effect of virus infection on host fitness. Outcrossing was found to limit the spread of viruses significantly more than selfing. It is concluded that the exclusion of viruses from sexual Aspergilli could be due to the formation of new somatic incompatibility groups by sexual recombination.

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“…The system is a heterogenic one in that strains which carry identical genes at all het loci are compatible, while allelic differences at one or more het loci will render the two strains heterokaryon incompatible. Allelic differences at het loci do not seem to prevent or even significantly reduce the capacity for sexual crossing between strains (Jinks et al, 1966;Butcher, 1968).…”

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confidence: 99%

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

1993

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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.

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Heterokaryon incompatibility and variation in wild populations of Aspergillus nidulans

Cited by 72 publications

References 13 publications

Non-allelic interactions and genetic isolation in wild populations of Aspergillus nidulans

Non-allelic interactions and genetic isolation in wild populations of Aspergillus nidulans

Factors affecting the spread of double-stranded RNA viruses in Aspergillus nidulans

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

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