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Mutations of the A mating type factor in Coprinus lagopus

Published online by Cambridge University Press:  14 April 2009

P. R. Day
P. R. Day
Affiliation:
John Innes Institute, Bayfordbury, Hertford, Herts.

Extract

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Ten A factor mutants and an unlinked A suppressor mutant were isolated from fruit bodies formed by common A heterokaryons of Coprinus lagopus. All A factor mutants formed false clamps and lacked A mating-type specificity. Four A5 and two A6 mutants had functional α sub-units which were recovered in tests for intra-factor recombination in matings between mutant and wild-type factors. No functional β sub-units were recovered in tests of two of the A5 mutants and the two A6 mutants which possessed functional α sub-units. From three other mutants (two A5 and one A6) neither α nor β sub-units were recovered.

The suppressor mutant also formed false clamps but was recessive since stocks carrying it retained their A and B specificities when mated with wild-type testers. Fruit bodies formed by monokaryons carrying the suppressor mutant had pale gills bearing varying proportions of abnormal tetrads with less than four spores.

Type
Research Article
Information
Genetics Research , Volume 4 , Issue 1 , February 1963 , pp. 55 - 64
Copyright
Copyright © Cambridge University Press 1963

References

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