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Postmeiotic segregation in locus ‘46’ of Ascobolus immersus

Published online by Cambridge University Press:  14 April 2009

W. Gajewski ,
A. Paszewski ,
A. Dawidowicz  and
B. Dudzińska
W. Gajewski
Affiliation:
Department of General Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
A. Paszewski
Affiliation:
Department of General Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
A. Dawidowicz
Affiliation:
Department of General Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
B. Dudzińska
Affiliation:
Department of General Genetics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland

Extract

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White-spored mutants of Ascobolus immersus were used to study postmeiotic segregation within a gene. It was found that in two-point crosses between mutants showing postmeiotic segregation, polarization in recombinant asci resulting from this type of segregation resembled that in normal (even-type) conversion. However, the ratio of recombinant asci with even segregation (6:2 asci) to those with odd segregation (7:1 asci) was much higher than might have been expected on the basis of the frequencies of various recombinant asci found in crosses between the same mutants and the wild-type strain. It seems that none of the current models of recombination gives a satisfactory explanation of the results obtained.

Type
Research Article
Information
Genetics Research , Volume 11 , Issue 3 , June 1968 , pp. 311 - 318
Copyright
Copyright © Cambridge University Press 1968

References

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