1887

Abstract

Three hundred and seventy mutants of the ascomycete stock were isolated. They were assigned to at least 75 loci. Mutations in 33 loci affect ascospore morphology: 19 of these loci affect pigmentation, 5 affect pigment distribution and 9 affect shape. The reliability of various phenotypes and the role of multigenic control on ascospore morphogenesis are discussed. Other mutations affect the mycelial growth rate or morphology and sporulation. A total of 56 loci have been mapped in 13 linkage groups corresponding to at least nine chromosomes. Using an intermediary strain, successful crosses between two intersterile stocks of ( and ) demonstrated that 12 pairs of mutants isolated in each stock correspond to 12 homologous loci.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-125-2-257
1981-08-01
2024-12-12
Loading full text...

Full text loading...

/deliver/fulltext/micro/125/2/mic-125-2-257.html?itemId=/content/journal/micro/10.1099/00221287-125-2-257&mimeType=html&fmt=ahah

References

  1. Chevaugeon J. 1959; La zonation du thalle, phénomène périodique autonome chez l’Ascobolus immersus. Compte rendu hebdomadaire des séances de l’Académie des Sciences 248:1381–1384
    [Google Scholar]
  2. Decaris B., Girard J., Leblon G. 1974 In Handbook of Genetics pp. 563–573 Edited by King R. C. New York: Plenum Press;
    [Google Scholar]
  3. Decaris B., Francou F., Lefort C., Rizet G. 1978; Unstable ascospore color mutant of Ascobolus immersus. I. Temporal occurrence and modalities of back-mutations. Molecular and General Genetics 162:69–81
    [Google Scholar]
  4. Decaris B., Francou F., Kouassi A., Lefort C., Rizet G. 1981; Genetic instability in Ascobolus immersus: modalities of back-mutations, intragenic mapping of unstable sites, and unstable insertion. Preliminary biochemical data. Cold Spring Harbor Symposia on Quantitative Biology 45:2326–2354
    [Google Scholar]
  5. Girard J., Rossignol J.-L. 1974; The suppression of gene conversion and intragenic crossing- over in Ascobolus immersus: evidence for modifiers acting in the heterozygous state. Genetics 76:222–243
    [Google Scholar]
  6. Leblon G. 1972; Mechanism of gene conversion in Ascobolus immersus. I. Existence of a correlation between the origin of mutants induced by different mutagens and their conversion spectrum. Molecular and General Genetics 115:36–48
    [Google Scholar]
  7. Leblon G. 1974 Mise en évidence et propriétés d’un mécanisme de correction mutant spécifique a l’origine des conversions chez Ascobolus immersus Thèse Doctorat-ès-Sciences, Université Paris-Sud, Centre d’Orsay, France
    [Google Scholar]
  8. Leblon G., Paquette N. 1978; Intragenic suppression at the b2 locus in Ascobolus immersus.I. Identification of three distinct groups of sup-pression. Genetics 90:475–488
    [Google Scholar]
  9. Lissouba P., Mousseau J., Rizet G., Rossignol J. -L. 1962; Fine structure of genes in Ascobolus immersus. Advances in Genetics 11:343–380
    [Google Scholar]
  10. Mekki-Berrada A., Rossignol J.-L., Paquette N. 1976; Haute fréquence de réversion d’un mutant spontané chez Ascobolus immersus. Compte rendu hebdomadaire des séances de l’Académie des Sciences 283:971–974
    [Google Scholar]
  11. Mortimer R. K., Hawthorne D. C. 1975; Genetic mapping in yeast. Methods in Cell Biology 11:221–233
    [Google Scholar]
  12. Nicolas A. 1978 Carte génétique et fréquences de conversion dans le génome d’Ascobolus immersus Thése Doctorat, Universite Paris-Sud, Centre d’Orsay, France.
    [Google Scholar]
  13. Nicolas A. 1979; Variation of gene conversion and intragenic recombination frequencies in the genome of. Ascobolus immersus. Molecular and General Genetics 176:129–138
    [Google Scholar]
  14. Paquette N. 1973 Cartographic preliminaire des mutants morphologiques de la souche S2 d’Ascobolus immersus et mise en évidence d’un nouveau systeme génétique de la recombinaison intragénique avec marqueurs externes chez ce champignon M.Sc. thesis University of Montreal; Canada:
    [Google Scholar]
  15. Paquette N. 1978; Detection of aberrant 4:4 asci in Ascobolus immersus. Canadian Journal of Genetics and Cytology 20:9–17
    [Google Scholar]
  16. Paszewski A., Surzycki S., Mankowska M. 1966; Chromosome maps in Ascobolus immersus (Rizet strain). Acta Societatis botanicorum Poloniae 35:181–188
    [Google Scholar]
  17. Perkins D. D. 1949; Biochemical mutants in smut fungusUstilago maydis. Genetics 34:607–626
    [Google Scholar]
  18. Rizet G., Rossignol J.-L., Lefort C. 1969; Sur la variété et la spécificité des spectres d’anomalies de ségrégations chez Ascobolus. Compte rendu hebdomadaire des séances de l’Academie des Sciences 269:1427–1430
    [Google Scholar]
  19. Rizet G., Lefort C., Decaris B., Francou F., Kouassi A. 1979; Unstable ascospore color mutants of Ascobolus immersus. III. Mapping, temporal occurrence and modalities of back-mutations of 34 new unstable mutants. Molecular and General Genetics 175:293–303
    [Google Scholar]
  20. Rossignol J.-L., Paquette N., Nicolas A. 1979; Aberrant 4:4 asci, disparity in the direction of conversion and frequencies of conversion in Ascobolus immersus. Cold Spring Harbor Symposia on Quantitative Biology 43:1343–1352
    [Google Scholar]
  21. Stadler D. R., Towe A. M., Rossignol J. -L. 1970; Intragenic recombination of ascospore color mutants in Ascobolus and its relationship to the segregation of outside markers. Genetics 66:429–447
    [Google Scholar]
  22. Yu Sun C. C. C. 1964; Biochemical and morpho-logical mutants of Ascobolus immersus. Genetics 50:987–998
    [Google Scholar]
  23. Yu Sun C. C. C. 1966; Linkage groups in Ascobolus immersus. Genetika 37:569–580
    [Google Scholar]
/content/journal/micro/10.1099/00221287-125-2-257
Loading
/content/journal/micro/10.1099/00221287-125-2-257
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error