Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-28T05:40:04.771Z Has data issue: false hasContentIssue false
  • English
  • Français

The control of plastid inheritance in Pelargonium

Published online by Cambridge University Press:  14 April 2009

R. A. E. Tilney-Bassett
R. A. E. Tilney-Bassett
Affiliation:
Department of Genetics, University College of Swansea
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Twenty-four reciprocal crosses between two green and six chimera cultivars, containing respectively normal green and mutant white plastids in their germ layers, were analysed for their segregation patterns of green, variegated and white embryos, and for their fertility data.

Analysis of variance of fertility data showed that W × G crosses were generally less fertile than the reciprocal G × W crosses, but this was not correlated with selection against any particular class of embryo.

Analysis of segregation patterns showed that they were essentially the same with a constant female and varying male parent, but change the female and the pattern could be radically altered. The six different mutant females with both constant green males could be arranged in a sequence in which white plastids were increasingly successful, and white and variegated embryos increasingly frequent. A similar sequence was demonstrated with three green females and two constant white males. It was concluded that the major control of plastid inheritance was determined by the female nuclear and plastid genotypes, with the male having only a minor, modifying influence even when male plastids were more successfully transmitted than female ones.

The very low frequencies of variegated embryos in some crosses led to a rejection of the classical hypothesis of sorting-out from mixed cells, and its replacement by the hypothesis that pure green or pure white embryos arise by the replication of only one plastid at a time, whereas variegated embryos arise by replication of both plastids.

Type
Research Article
Information
Genetics Research , Volume 16 , Issue 1 , August 1970 , pp. 49 - 61
Copyright
Copyright © Cambridge University Press 1970

References

REFERENCES

Baur, E. (1809). Das Wesen und die Erblichkeitsverhältnisse der ‘Varietates albomarginatae hort’ von Pelargonium zonale. Zeitschrift für Vererbungslehre 1, 330–351.Google Scholar
Fisher, R. A. & Yates, F. (1963). Statistical Tables for Biological, Agricultural and Medical Research, 6th. ed.Edinburgh and London: Oliver and Boyd.Google Scholar
Hagemann, R. (1964). Plasmatische Vererbung. Genelik Gründlagen, Ergebnisse und Probleme in Einzeldarstellungen. Jena: Veb Gustav Fischer Verlag.Google Scholar
Kirk, J. T. O. & Tilney-Bassett, R. A. E. (1967). The Plastids: Their Chemistry, Structure, Growth and Inheritance. London and San Francisco: W. H. Freeman and Company.Google Scholar
Michaelis, P. (1955 a). Modellversuche zur Plastiden- und Plasmavererbung. Züchter 25, 209–221.CrossRefGoogle Scholar
Michaelis, P. (1955 b). Über Gesetzmässigkeiten der Plasmon-Umkombination und über eine Methode zur Trennung einer Plastiden-, Chrondriosomen-, resp. Sphaerosomen-, (Mikrosomen)- und einer Zytoplasmavererbung. Cytalogia 20, 315–338.CrossRefGoogle Scholar
Scheffé, H. (1959). The Analysis of Variance. New York and London: John Wiley and Sons Inc.Google Scholar
Tilney-Bassett, R. A. E. (1963). Genetics and plastid physiology in Pelargonium. Heredity 18, 485–504.CrossRefGoogle Scholar
Tilney-Bassett, R. A. E. (1964). Failure to transmit mutant plastids in a Pelargonium cross. Heredity 19, 516–518.CrossRefGoogle Scholar
Tilney-Bassett, R. A. E. (1965). Genetics and plastid physiology in Pelargonium: II. Heredity 20, 451–466.CrossRefGoogle Scholar
Tilney-Bassett, R. A. E. (1970 a). Genetics and plastid physiology in Pelargonium. III. Effect of cultivar and plastids on fertilisation and embryo survival. Heredity 25, 89–103.CrossRefGoogle Scholar
Tilney-Bassett, R. A. E. (1970 b). Effect of environment on plastid segregation in young embryos of Pelargonium × Hortorum Bailey. Annals of Botany 34, in Press.CrossRefGoogle Scholar